Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hi Again: If one were on Mars (hold your breath and bring a warm jacket), Holmes would be 1.17 AU away (vs. 1.63 AU) and 0.7 magnitudes (2 times) brighter than what we see. And there would be less intereference from moonlight! Larry On Wed, October 24, 2007 2:20 pm, mexicodoug wrote: > Hi Again Listees, > > > With regards to Comet 17P (Holmes) estimated at under 3.5 Km in diameter, > and being twice as far from the Earth as the planet Mars: > > How could it be one sixteenth as bright as Mars and an easy object in the > night sky with an almost Full Moon? No doubt it has a lot of ice > crystals or something white and reflective. A rought thought says that in > absolute terms it is one fourth the brightness of Mars if they were at the > same distance from us! This is because we perceive only 1/4 of the light > intensity due to the doubling of distance, > > It is it is hard to avoid the temptation of thinking this tiny body is of > relatively pristine material now confined to the Asteroid belt, but > before, from the Outer Solar System, and may, for once, given Jupiter his > dues, have been affected by a relatively close pass to the inner Solar > System, with > Venus, Earth and Mars all aligned this month to exert their gravitational > attraction together. Not to mention all of the scientists and collectors > who would will material to Earth. > > The comet is over 40% further away from Earth as it is from Mars at the > moment, so I hope the guys with their hands on the controls of the Mars > rovers take a break and look up for us at MidSolnight, and that the Deep > Impact Crew is already into emergency overdrive to make the comparison > they will be held accountable for, now that there is a second chance > :-)... > > > Best Skies and great health, > Doug > > > > > > - Original Message - > From: "mexicodoug" <[EMAIL PROTECTED]> > To: > Sent: Wednesday, October 24, 2007 2:52 PM > Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! > > > >> Hello List, >> >> >> This bodes great (in a Titian-Bodean sense) for tonight in Europe and >> North America. I put a finder chart up for this evening at: >> >> >> www.diogenite.com/17P.jpg >> >> This is the show in Europe right now...and should print well to an A4 >> or letter sized piece of paper. >> >> A new "star" was just born for those familiar with the neighborhood of >> Algol and Capella. The best time will be as the moon gets lower just >> before the glow of Sunrise, and the comet will be half way to the Zenith >> due NW (and the chart will still be fine upside down in the Northern >> hemisphere). Mars will brightly shine 16 times brighter overhead in >> Gemini. Nearby is Capella, the 6th largest star and 6th brightest >> starry object in the sky (Called Colca by the Aymara for a cache of food >> - which >> ancient Greeks believed was the horn of plenty "Cornucopia", and the >> name of the famous Valley/Canyon of Condors by Arequipa, Peru) is >> nearby. >> >> Moon or not, it's so bright you can still get a fine view after Sunset >> if you don't mind the interference from that big Lunar up there. >> Tonight's >> the night!! The location on the finder chart is similar for the next >> week (heading toward Mirphak, just a tad), since the comet is very far >> away from Earth with respect to noticable relative motion. >> >> Best wishes for a long night, >> Doug >> >> >> >> >> - Original Message - >> From: "K. Ohtsuka" <[EMAIL PROTECTED]> >> To: "MeteoriteList" >> Sent: Wednesday, October 24, 2007 12:32 PM >> Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! >> >> >> >>> Hello all, >>> >>> >>> I have just looked at the superoutburst of 17P/Holmes, >>> as follows: >>> >>> 2007 Oct. 24.72 UT: m1=2.8, Dia.=, DC=9, by NE >>> >>> >>> Katsu. OHTSUKA >>> Tokyo, JAPAN >>> >>> >>> - Original Message - >>> From: "giovannisostero" <[EMAIL PROTECTED]> >>> To: "mexicodoug" <[EMAIL PROTECTED]> >>> Cc: "meteorite-list" >>> Sent: Thursday, October 25, 2007 1:22 AM >>> Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! >>> >>> >>> >>>> Hi all, >>>> this is our BVR shot of 17P/Holmes in outburst (brightest object in >>>> the >>> fie
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hey Biela, let's go Holmes. Meteor storm us! Jerry Flaherty - Original Message - From: "Sterling K. Webb" <[EMAIL PROTECTED]> To: Cc: <[EMAIL PROTECTED]> Sent: Wednesday, October 24, 2007 8:09 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi, A history of Holmes at: http://cometography.com/pcomets/017p.html says it was discovered (1892) in a brilliant "naked-eye" outburst but then faded away. Five months later, it brightened again back to a lesser "naked-eye" status. It was observed through its 1906 perihelion, but was lost thereafter. It was often observed without any coma whatsoever. It was recovered in 1964 after Brian Marsten recalculated the orbit, as a coma-less condensation and has never shown more than a wisp of coma... until now. Hard to imagine that solar heating of volatiles at its great distance at irregular intervals could be responsible for such brightening. When it was discovered, it was excitedly thought to be a recovery of Comet Biela, and we all know what happened in Biela-ville. Exposing half the comet to sunlight (or a third or a quarter) might do it. [For those not up on their comet gossip, the large bright Comet Biela broke apart into TWO Comet Bielas, then eventually NO Comet Bielas. http://en.wikipedia.org/wiki/3D/Biela] Sterling K. Webb -- - Original Message - From: "Chris Peterson" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 6:40 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! It certainly is remarkable. Fascinating to speculate on just what occurred to throw off what must be a vast amount of material. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Sure, and my questions were rhetorical more than anything else (not to compare to Halley's Comet's size, or anything like that - they are miracle specific). What would the wise kings in Biblical times have made of this? (rhetorical) However, coma aside, a (now) 500,000 times increase in a few short hours is quite remarkable by any standard - especially for something so far away, and what has gone into this. This is not your typical comet event as you know and is completely exploding off any graph for how magnitudes of comets normally evolve - that is at the heart. This event will go down as one of the most spectacular, if not the most spectacular, of its kind ever observed. If not for the prior much lesser outburst recorded for this comet, I would be more inclined to think it was an impact, than anything else. This is a comet that at closest approach to the Sun only makes a Vesta (Main belt asteroid, maximum concentration zone) distance. It virtually appeared out of nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point about the coma is well accepted. I am blown away by rate at which it happened as the comet was already very well far on its way out. and after all, it is traveling at 2.2 Km/s. Best wishes, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
I just received my phone call and email from Space Weather.com phone line. This List is remarkable for its early warning system! Jerry Flaherty - Original Message - From: "Chris Peterson" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 7:40 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! It certainly is remarkable. Fascinating to speculate on just what occurred to throw off what must be a vast amount of material. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Sure, and my questions were rhetorical more than anything else (not to compare to Halley's Comet's size, or anything like that - they are miracle specific). What would the wise kings in Biblical times have made of this? (rhetorical) However, coma aside, a (now) 500,000 times increase in a few short hours is quite remarkable by any standard - especially for something so far away, and what has gone into this. This is not your typical comet event as you know and is completely exploding off any graph for how magnitudes of comets normally evolve - that is at the heart. This event will go down as one of the most spectacular, if not the most spectacular, of its kind ever observed. If not for the prior much lesser outburst recorded for this comet, I would be more inclined to think it was an impact, than anything else. This is a comet that at closest approach to the Sun only makes a Vesta (Main belt asteroid, maximum concentration zone) distance. It virtually appeared out of nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point about the coma is well accepted. I am blown away by rate at which it happened as the comet was already very well far on its way out. and after all, it is traveling at 2.2 Km/s. Best wishes, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Given the improbability of solar excitation because of the mighty distance, could a mighty collisional event be perhaps the cause of this sudden brightening. An event colossal compared to our recent astounding success an comet interception but rather weak effects at brightening, preceived only marginaly from anywhere but Right There. Jerry Flaherty - Original Message - From: "Sterling K. Webb" <[EMAIL PROTECTED]> To: Cc: <[EMAIL PROTECTED]> Sent: Wednesday, October 24, 2007 8:09 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi, A history of Holmes at: http://cometography.com/pcomets/017p.html says it was discovered (1892) in a brilliant "naked-eye" outburst but then faded away. Five months later, it brightened again back to a lesser "naked-eye" status. It was observed through its 1906 perihelion, but was lost thereafter. It was often observed without any coma whatsoever. It was recovered in 1964 after Brian Marsten recalculated the orbit, as a coma-less condensation and has never shown more than a wisp of coma... until now. Hard to imagine that solar heating of volatiles at its great distance at irregular intervals could be responsible for such brightening. When it was discovered, it was excitedly thought to be a recovery of Comet Biela, and we all know what happened in Biela-ville. Exposing half the comet to sunlight (or a third or a quarter) might do it. [For those not up on their comet gossip, the large bright Comet Biela broke apart into TWO Comet Bielas, then eventually NO Comet Bielas. http://en.wikipedia.org/wiki/3D/Biela] Sterling K. Webb -- - Original Message - From: "Chris Peterson" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 6:40 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! It certainly is remarkable. Fascinating to speculate on just what occurred to throw off what must be a vast amount of material. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Sure, and my questions were rhetorical more than anything else (not to compare to Halley's Comet's size, or anything like that - they are miracle specific). What would the wise kings in Biblical times have made of this? (rhetorical) However, coma aside, a (now) 500,000 times increase in a few short hours is quite remarkable by any standard - especially for something so far away, and what has gone into this. This is not your typical comet event as you know and is completely exploding off any graph for how magnitudes of comets normally evolve - that is at the heart. This event will go down as one of the most spectacular, if not the most spectacular, of its kind ever observed. If not for the prior much lesser outburst recorded for this comet, I would be more inclined to think it was an impact, than anything else. This is a comet that at closest approach to the Sun only makes a Vesta (Main belt asteroid, maximum concentration zone) distance. It virtually appeared out of nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point about the coma is well accepted. I am blown away by rate at which it happened as the comet was already very well far on its way out. and after all, it is traveling at 2.2 Km/s. Best wishes, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
On Wed, 24 Oct 2007 19:09:21 -0500, you wrote: >A history of Holmes at: >http://cometography.com/pcomets/017p.html >says it was discovered (1892) in a brilliant "naked-eye" >outburst but then faded away. Five months later, it Hm. A unusual acting comet named Holmes and a prominent Scientologist married to someone named Holmes. Coincidence? Maybe Hale-Bopp isn't the only comet with a spaceship behind it... __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Wouldn't you know, clouded out here in eastern Massachusetts. Fortunately, Comets should "hang around" for a time. Jerry Flaherty - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 3:52 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hello List, This bodes great (in a Titian-Bodean sense) for tonight in Europe and North America. I put a finder chart up for this evening at: www.diogenite.com/17P.jpg This is the show in Europe right now...and should print well to an A4 or letter sized piece of paper. A new "star" was just born for those familiar with the neighborhood of Algol and Capella. The best time will be as the moon gets lower just before the glow of Sunrise, and the comet will be half way to the Zenith due NW (and the chart will still be fine upside down in the Northern hemisphere). Mars will brightly shine 16 times brighter overhead in Gemini. Nearby is Capella, the 6th largest star and 6th brightest starry object in the sky (Called Colca by the Aymara for a cache of food - which ancient Greeks believed was the horn of plenty "Cornucopia", and the name of the famous Valley/Canyon of Condors by Arequipa, Peru) is nearby. Moon or not, it's so bright you can still get a fine view after Sunset if you don't mind the interference from that big Lunar up there. Tonight's the night!! The location on the finder chart is similar for the next week (heading toward Mirphak, just a tad), since the comet is very far away from Earth with respect to noticable relative motion. Best wishes for a long night, Doug - Original Message - From: "K. Ohtsuka" <[EMAIL PROTECTED]> To: "MeteoriteList" Sent: Wednesday, October 24, 2007 12:32 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hello all, I have just looked at the superoutburst of 17P/Holmes, as follows: 2007 Oct. 24.72 UT: m1=2.8, Dia.=, DC=9, by NE Katsu. OHTSUKA Tokyo, JAPAN - Original Message - From: "giovannisostero" <[EMAIL PROTECTED]> To: "mexicodoug" <[EMAIL PROTECTED]> Cc: "meteorite-list" Sent: Thursday, October 25, 2007 1:22 AM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi all, this is our BVR shot of 17P/Holmes in outburst (brightest object in the field center): http://tinyurl.com/2mxrmx Cheers, Giovanni and Ernesto __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hi, A history of Holmes at: http://cometography.com/pcomets/017p.html says it was discovered (1892) in a brilliant "naked-eye" outburst but then faded away. Five months later, it brightened again back to a lesser "naked-eye" status. It was observed through its 1906 perihelion, but was lost thereafter. It was often observed without any coma whatsoever. It was recovered in 1964 after Brian Marsten recalculated the orbit, as a coma-less condensation and has never shown more than a wisp of coma... until now. Hard to imagine that solar heating of volatiles at its great distance at irregular intervals could be responsible for such brightening. When it was discovered, it was excitedly thought to be a recovery of Comet Biela, and we all know what happened in Biela-ville. Exposing half the comet to sunlight (or a third or a quarter) might do it. [For those not up on their comet gossip, the large bright Comet Biela broke apart into TWO Comet Bielas, then eventually NO Comet Bielas. http://en.wikipedia.org/wiki/3D/Biela] Sterling K. Webb -- - Original Message - From: "Chris Peterson" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 6:40 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! It certainly is remarkable. Fascinating to speculate on just what occurred to throw off what must be a vast amount of material. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! > Sure, and my questions were rhetorical more than anything else (not to > compare to Halley's Comet's size, or anything like that - they are > miracle specific). What would the wise kings in Biblical times have > made of this? (rhetorical) > > However, coma aside, a (now) 500,000 times increase in a few short > hours is quite remarkable by any standard - especially for something > so far away, and what has gone into this. This is not your typical > comet event as you know and is completely exploding off any graph for > how magnitudes of comets normally evolve - that is at the heart. > > This event will go down as one of the most spectacular, if not the > most spectacular, of its kind ever observed. If not for the prior > much lesser outburst recorded for this comet, I would be more inclined > to think it was an impact, than anything else. This is a comet that > at closest approach to the Sun only makes a Vesta (Main belt asteroid, > maximum concentration zone) distance. It virtually appeared out of > nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. > Nonetheless, your point about the coma is well accepted. > > I am blown away by rate at which it happened as the comet was already > very well far on its way out. and after all, it is traveling at 2.2 > Km/s. > Best wishes, > Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
It certainly is remarkable. Fascinating to speculate on just what occurred to throw off what must be a vast amount of material. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Sure, and my questions were rhetorical more than anything else (not to compare to Halley's Comet's size, or anything like that - they are miracle specific). What would the wise kings in Biblical times have made of this? (rhetorical) However, coma aside, a (now) 500,000 times increase in a few short hours is quite remarkable by any standard - especially for something so far away, and what has gone into this. This is not your typical comet event as you know and is completely exploding off any graph for how magnitudes of comets normally evolve - that is at the heart. This event will go down as one of the most spectacular, if not the most spectacular, of its kind ever observed. If not for the prior much lesser outburst recorded for this comet, I would be more inclined to think it was an impact, than anything else. This is a comet that at closest approach to the Sun only makes a Vesta (Main belt asteroid, maximum concentration zone) distance. It virtually appeared out of nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point about the coma is well accepted. I am blown away by rate at which it happened as the comet was already very well far on its way out. and after all, it is traveling at 2.2 Km/s. Best wishes, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Great tip Doug. Will stay tuned. Haven't heard yet from Space Weather Phone, a paid subscription I have, so thanks again for an early tip. Jerry Flaherty - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 10:58 AM Subject: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Resend didn't go through the first time ... - Original Message - From: mexicodoug To: meteorite-list@meteoritecentral.com Sent: Wednesday, October 24, 2007 9:28 AM Subject: Comet 17P (Holmes) Visible Event ! Hi List, In the ancient constellation of Perseus (Rising in the NE just after Sunset and highest in the sky around 2-4 am), a fading comet has suddenly exploded back into life. This comet, 17P Holmes, is suddenly visible to the naked eye, although it had already swung by its perihelion months ago and was now about 2.5 AU from the Sun. (and a little bit more than the Sun-Mars distance from Earth). Initially mistaken for a companion to the Andromeda Galaxy, Comet Holmes was discovered in 1892, and has had a lesser outburst before... Not bad for a Jupiter family (main belt asteroid like) comet estimated at less than 3.5 Km in diameter. What is happing aboard Comet Holmes? Why is it suddenly 100,000 times brighter than it was before? Don't touch that dial and stay tuned for some exciting scenes next week :-) Happy Hunting, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hi, Doug, Walt, List, Get out those binoculars. Maybe you won't need them... Posted 49 minutes ago. P17 now 1,000,000 times brighter. Reported visible to the naked eye from a large city: http://www.skyandtelescope.com/observing/highlights/10775326.html "Comet expert Gary Kronk expects this object to remain bright and grow from a starlike point to several arcminutes across over the next few nights as it makes its way slowly westward across Perseus. Its position on October 25th (0h UT) is right ascension 3h 53m, declination +50.1° (equinox 2000), and by October 30th it will have moved only to 3h 48m, +50.4°. For those living in the Northern Hemisphere, Perseus is visible all night at this time of year." http://www.space.com/spacewatch/071025-comet-holmes.html with North American 8 pm chart for tonight at: http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=071024-comet-holmes-02.jpg&cap=Comet+Holmes%27+location+as+of+Oct.+24th+at+8+p.m.+local+time+from+midnorthern+latitudes.+ Sterling K. Webb -- - Original Message - From: "Walter Branch" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 5:41 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi Doug, You are right. This is a phenomenal event! First a supernova in NGC 7721 and now this comet suddenly brightens by several magnitudes. Unfortunately, all I have at present is a great view of the Great Cloudy (and rainey) Nebula. -Walter Branch (listing more meteorites on ebay) - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 6:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! > Sure, and my questions were rhetorical more than anything else (not to > compare to Halley's Comet's size, or anything like that - they are miracle > specific). What would the wise kings in Biblical times have made of this? > (rhetorical) > > However, coma aside, a (now) 500,000 times increase in a few short hours > is quite remarkable by any standard - especially for something so far > away, and what has gone into this. This is not your typical comet event > as you know and is completely exploding off any graph for how magnitudes > of comets normally evolve - that is at the heart. > > This event will go down as one of the most spectacular, if not the most > spectacular, of its kind ever observed. If not for the prior much lesser > outburst recorded for this comet, I would be more inclined to think it was > an impact, than anything else. This is a comet that at closest approach > to the Sun only makes a Vesta (Main belt asteroid, maximum concentration > zone) distance. It virtually appeared out of nowhere into not only the > eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point > about the coma is well accepted. > > I am blown away by rate at which it happened as the comet was already very > well far on its way out. and after all, it is traveling at 2.2 Km/s. > Best wishes, > Doug > > ----- Original Message - > From: "Chris Peterson" <[EMAIL PROTECTED]> > To: > Sent: Wednesday, October 24, 2007 4:33 PM > Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! > > >> The size of the comet core is largely irrelevant. What matters is the >> size of the coma, since that's what is reflecting the light. And an >> active comet can easily have a coma many times larger than Mars. In >> reality, active comets are amongst the largest objects in the Solar >> System, even though their cores are amongst the smallest. >> >> Chris >> >> ********* >> Chris L Peterson >> Cloudbait Observatory >> http://www.cloudbait.com >> >> >> - Original Message - >> From: "mexicodoug" <[EMAIL PROTECTED]> >> To: >> Sent: Wednesday, October 24, 2007 3:20 PM >> Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! >> >> >>> Hi Again Listees, >>> >>> With regards to Comet 17P (Holmes) estimated at under 3.5 Km in >>> diameter, and being twice as far from the Earth as the planet Mars: >>> >>> How could it be one sixteenth as bright as Mars and an easy object in >>> the night sky with an almost Full Moon? No doubt it has a lot of ice >>> crystals or something white and reflective. A rought thought says that >>> in absolute terms it is one fourth the brightness of Mars if they were >>> at the same distance from us! This is because we perceive only 1/4 of >>> the l
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hi Doug, You are right. This is a phenomenal event! First a supernova in NGC 7721 and now this comet suddenly brightens by several magnitudes. Unfortunately, all I have at present is a great view of the Great Cloudy (and rainey) Nebula. -Walter Branch (listing more meteorites on ebay) - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 6:10 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Sure, and my questions were rhetorical more than anything else (not to compare to Halley's Comet's size, or anything like that - they are miracle specific). What would the wise kings in Biblical times have made of this? (rhetorical) However, coma aside, a (now) 500,000 times increase in a few short hours is quite remarkable by any standard - especially for something so far away, and what has gone into this. This is not your typical comet event as you know and is completely exploding off any graph for how magnitudes of comets normally evolve - that is at the heart. This event will go down as one of the most spectacular, if not the most spectacular, of its kind ever observed. If not for the prior much lesser outburst recorded for this comet, I would be more inclined to think it was an impact, than anything else. This is a comet that at closest approach to the Sun only makes a Vesta (Main belt asteroid, maximum concentration zone) distance. It virtually appeared out of nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point about the coma is well accepted. I am blown away by rate at which it happened as the comet was already very well far on its way out. and after all, it is traveling at 2.2 Km/s. Best wishes, Doug - Original Message - From: "Chris Peterson" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:33 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! The size of the comet core is largely irrelevant. What matters is the size of the coma, since that's what is reflecting the light. And an active comet can easily have a coma many times larger than Mars. In reality, active comets are amongst the largest objects in the Solar System, even though their cores are amongst the smallest. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 3:20 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi Again Listees, With regards to Comet 17P (Holmes) estimated at under 3.5 Km in diameter, and being twice as far from the Earth as the planet Mars: How could it be one sixteenth as bright as Mars and an easy object in the night sky with an almost Full Moon? No doubt it has a lot of ice crystals or something white and reflective. A rought thought says that in absolute terms it is one fourth the brightness of Mars if they were at the same distance from us! This is because we perceive only 1/4 of the light intensity due to the doubling of distance, It is it is hard to avoid the temptation of thinking this tiny body is of relatively pristine material now confined to the Asteroid belt, but before, from the Outer Solar System, and may, for once, given Jupiter his dues, have been affected by a relatively close pass to the inner Solar System, with Venus, Earth and Mars all aligned this month to exert their gravitational attraction together. Not to mention all of the scientists and collectors who would will material to Earth. The comet is over 40% further away from Earth as it is from Mars at the moment, so I hope the guys with their hands on the controls of the Mars rovers take a break and look up for us at MidSolnight, and that the Deep Impact Crew is already into emergency overdrive to make the comparison they will be held accountable for, now that there is a second chance :-)... Best Skies and great health, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Sure, and my questions were rhetorical more than anything else (not to compare to Halley's Comet's size, or anything like that - they are miracle specific). What would the wise kings in Biblical times have made of this? (rhetorical) However, coma aside, a (now) 500,000 times increase in a few short hours is quite remarkable by any standard - especially for something so far away, and what has gone into this. This is not your typical comet event as you know and is completely exploding off any graph for how magnitudes of comets normally evolve - that is at the heart. This event will go down as one of the most spectacular, if not the most spectacular, of its kind ever observed. If not for the prior much lesser outburst recorded for this comet, I would be more inclined to think it was an impact, than anything else. This is a comet that at closest approach to the Sun only makes a Vesta (Main belt asteroid, maximum concentration zone) distance. It virtually appeared out of nowhere into not only the eyepiece, but also the naked eye at 2.4+ AU. Nonetheless, your point about the coma is well accepted. I am blown away by rate at which it happened as the comet was already very well far on its way out. and after all, it is traveling at 2.2 Km/s. Best wishes, Doug - Original Message - From: "Chris Peterson" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 4:33 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! The size of the comet core is largely irrelevant. What matters is the size of the coma, since that's what is reflecting the light. And an active comet can easily have a coma many times larger than Mars. In reality, active comets are amongst the largest objects in the Solar System, even though their cores are amongst the smallest. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 3:20 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi Again Listees, With regards to Comet 17P (Holmes) estimated at under 3.5 Km in diameter, and being twice as far from the Earth as the planet Mars: How could it be one sixteenth as bright as Mars and an easy object in the night sky with an almost Full Moon? No doubt it has a lot of ice crystals or something white and reflective. A rought thought says that in absolute terms it is one fourth the brightness of Mars if they were at the same distance from us! This is because we perceive only 1/4 of the light intensity due to the doubling of distance, It is it is hard to avoid the temptation of thinking this tiny body is of relatively pristine material now confined to the Asteroid belt, but before, from the Outer Solar System, and may, for once, given Jupiter his dues, have been affected by a relatively close pass to the inner Solar System, with Venus, Earth and Mars all aligned this month to exert their gravitational attraction together. Not to mention all of the scientists and collectors who would will material to Earth. The comet is over 40% further away from Earth as it is from Mars at the moment, so I hope the guys with their hands on the controls of the Mars rovers take a break and look up for us at MidSolnight, and that the Deep Impact Crew is already into emergency overdrive to make the comparison they will be held accountable for, now that there is a second chance :-)... Best Skies and great health, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
The size of the comet core is largely irrelevant. What matters is the size of the coma, since that's what is reflecting the light. And an active comet can easily have a coma many times larger than Mars. In reality, active comets are amongst the largest objects in the Solar System, even though their cores are amongst the smallest. Chris * Chris L Peterson Cloudbait Observatory http://www.cloudbait.com - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 3:20 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi Again Listees, With regards to Comet 17P (Holmes) estimated at under 3.5 Km in diameter, and being twice as far from the Earth as the planet Mars: How could it be one sixteenth as bright as Mars and an easy object in the night sky with an almost Full Moon? No doubt it has a lot of ice crystals or something white and reflective. A rought thought says that in absolute terms it is one fourth the brightness of Mars if they were at the same distance from us! This is because we perceive only 1/4 of the light intensity due to the doubling of distance, It is it is hard to avoid the temptation of thinking this tiny body is of relatively pristine material now confined to the Asteroid belt, but before, from the Outer Solar System, and may, for once, given Jupiter his dues, have been affected by a relatively close pass to the inner Solar System, with Venus, Earth and Mars all aligned this month to exert their gravitational attraction together. Not to mention all of the scientists and collectors who would will material to Earth. The comet is over 40% further away from Earth as it is from Mars at the moment, so I hope the guys with their hands on the controls of the Mars rovers take a break and look up for us at MidSolnight, and that the Deep Impact Crew is already into emergency overdrive to make the comparison they will be held accountable for, now that there is a second chance :-)... Best Skies and great health, Doug __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hi Again Listees, With regards to Comet 17P (Holmes) estimated at under 3.5 Km in diameter, and being twice as far from the Earth as the planet Mars: How could it be one sixteenth as bright as Mars and an easy object in the night sky with an almost Full Moon? No doubt it has a lot of ice crystals or something white and reflective. A rought thought says that in absolute terms it is one fourth the brightness of Mars if they were at the same distance from us! This is because we perceive only 1/4 of the light intensity due to the doubling of distance, It is it is hard to avoid the temptation of thinking this tiny body is of relatively pristine material now confined to the Asteroid belt, but before, from the Outer Solar System, and may, for once, given Jupiter his dues, have been affected by a relatively close pass to the inner Solar System, with Venus, Earth and Mars all aligned this month to exert their gravitational attraction together. Not to mention all of the scientists and collectors who would will material to Earth. The comet is over 40% further away from Earth as it is from Mars at the moment, so I hope the guys with their hands on the controls of the Mars rovers take a break and look up for us at MidSolnight, and that the Deep Impact Crew is already into emergency overdrive to make the comparison they will be held accountable for, now that there is a second chance :-)... Best Skies and great health, Doug - Original Message - From: "mexicodoug" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 24, 2007 2:52 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hello List, This bodes great (in a Titian-Bodean sense) for tonight in Europe and North America. I put a finder chart up for this evening at: www.diogenite.com/17P.jpg This is the show in Europe right now...and should print well to an A4 or letter sized piece of paper. A new "star" was just born for those familiar with the neighborhood of Algol and Capella. The best time will be as the moon gets lower just before the glow of Sunrise, and the comet will be half way to the Zenith due NW (and the chart will still be fine upside down in the Northern hemisphere). Mars will brightly shine 16 times brighter overhead in Gemini. Nearby is Capella, the 6th largest star and 6th brightest starry object in the sky (Called Colca by the Aymara for a cache of food - which ancient Greeks believed was the horn of plenty "Cornucopia", and the name of the famous Valley/Canyon of Condors by Arequipa, Peru) is nearby. Moon or not, it's so bright you can still get a fine view after Sunset if you don't mind the interference from that big Lunar up there. Tonight's the night!! The location on the finder chart is similar for the next week (heading toward Mirphak, just a tad), since the comet is very far away from Earth with respect to noticable relative motion. Best wishes for a long night, Doug - Original Message - From: "K. Ohtsuka" <[EMAIL PROTECTED]> To: "MeteoriteList" Sent: Wednesday, October 24, 2007 12:32 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hello all, I have just looked at the superoutburst of 17P/Holmes, as follows: 2007 Oct. 24.72 UT: m1=2.8, Dia.=, DC=9, by NE Katsu. OHTSUKA Tokyo, JAPAN - Original Message - From: "giovannisostero" <[EMAIL PROTECTED]> To: "mexicodoug" <[EMAIL PROTECTED]> Cc: "meteorite-list" Sent: Thursday, October 25, 2007 1:22 AM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi all, this is our BVR shot of 17P/Holmes in outburst (brightest object in the field center): http://tinyurl.com/2mxrmx Cheers, Giovanni and Ernesto __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hello List, This bodes great (in a Titian-Bodean sense) for tonight in Europe and North America. I put a finder chart up for this evening at: www.diogenite.com/17P.jpg This is the show in Europe right now...and should print well to an A4 or letter sized piece of paper. A new "star" was just born for those familiar with the neighborhood of Algol and Capella. The best time will be as the moon gets lower just before the glow of Sunrise, and the comet will be half way to the Zenith due NW (and the chart will still be fine upside down in the Northern hemisphere). Mars will brightly shine 16 times brighter overhead in Gemini. Nearby is Capella, the 6th largest star and 6th brightest starry object in the sky (Called Colca by the Aymara for a cache of food - which ancient Greeks believed was the horn of plenty "Cornucopia", and the name of the famous Valley/Canyon of Condors by Arequipa, Peru) is nearby. Moon or not, it's so bright you can still get a fine view after Sunset if you don't mind the interference from that big Lunar up there. Tonight's the night!! The location on the finder chart is similar for the next week (heading toward Mirphak, just a tad), since the comet is very far away from Earth with respect to noticable relative motion. Best wishes for a long night, Doug - Original Message - From: "K. Ohtsuka" <[EMAIL PROTECTED]> To: "MeteoriteList" Sent: Wednesday, October 24, 2007 12:32 PM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hello all, I have just looked at the superoutburst of 17P/Holmes, as follows: 2007 Oct. 24.72 UT: m1=2.8, Dia.=, DC=9, by NE Katsu. OHTSUKA Tokyo, JAPAN - Original Message - From: "giovannisostero" <[EMAIL PROTECTED]> To: "mexicodoug" <[EMAIL PROTECTED]> Cc: "meteorite-list" Sent: Thursday, October 25, 2007 1:22 AM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi all, this is our BVR shot of 17P/Holmes in outburst (brightest object in the field center): http://tinyurl.com/2mxrmx Cheers, Giovanni and Ernesto __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hello all, I have just looked at the superoutburst of 17P/Holmes, as follows: 2007 Oct. 24.72 UT: m1=2.8, Dia.=, DC=9, by NE Katsu. OHTSUKA Tokyo, JAPAN - Original Message - From: "giovannisostero" <[EMAIL PROTECTED]> To: "mexicodoug" <[EMAIL PROTECTED]> Cc: "meteorite-list" Sent: Thursday, October 25, 2007 1:22 AM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! > Hi all, > this is our BVR shot of 17P/Holmes in outburst (brightest object in the field center): > > http://tinyurl.com/2mxrmx > > Cheers, > Giovanni and Ernesto > > > __ > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hi all, this is our BVR shot of 17P/Holmes in outburst (brightest object in the field center): http://tinyurl.com/2mxrmx Cheers, Giovanni and Ernesto __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
