From: astror...@hotmail.com To: scho...@mybluelight.com; meteorite-list@meteoritecentral.com Subject: RE: [meteorite-list] 10/04/14 AZ Fireball: Sextant-Compass readings of Belmont, AZ smoke tr ail Date: Fri, 10 Oct 2014 20:59:04 -0500 Hello Steve and all, Thanks for your hard work. When it comes down to a good starting point, say using Kayenta or Hwy 160 as a reference, where would you suggest? I'm going to try to get over to that area Sunday. If there is anyone that has begin a seach for this possible fall, give me a shout. Would like to see a new fall in this area, even though it may be on a Reservation. May have to brush up on my trading skills. 😉 Dennis Miller Northwest New Mexico astror...@hotmail.com > Date: Sat, 11 Oct 2014 00:55:13 +0000 > To: meteorite-list@meteoritecentral.com > Subject: [meteorite-list] 10/04/14 AZ Fireball: Sextant-Compass readings of > Belmont, AZ smoke tr ail > From: meteorite-list@meteoritecentral.com > > Hello all, > > I took a trip out to the Belmont, AZ Weather Service and stood in front of > the camera that took the photo of the smoke cloud 5 or 6 minutes after it had > ended. I had the photo in hand to estimate to the best of my ability as to > where the clouds were in the sky as related to Fremont Peak that morning. > These clouds might have dissipated somewhat and drifted slightly to the south > east 5 to 6 min after the fireball passed. > > I spent over an hour taking readings with my WWII Bendix A-7 sextant, and two > WWI British prismatic compasses, averaging the readings of each. > > (BTW: these compasses are top notch, so good that they were used by sailors > lost at sea to find destinations even without a sextant. The WWII Bendix A-7 > is a fantastic sextant and very accurate as well) > > Readings from the compasses: (Magnetic) 35 - 36 degrees Easterly direction. > > Sextant, after estimating where the clouds were over Fremont Peak. > > Top cloud (larger one): 13.0 degrees above horizon. > > Bottom cloud (smaller one): 7.25 degrees above horizon. > > Average between both as the two clouds are linked in a chain ~8.6 degrees > above horizon. > > The top cloud which is very dispersed after the six or so min after the > fireball end at 15:52:32 represents the start of the fireball, and from > reports it came in a a very steep angle ~45 degrees from the North East. This > fireball was observed from the Belmont location and others West of Flagstaff > including my all sky camera, as going DOWNWARD. If it rose up, or remained > stationary instead of downward as it did, then it would appear heading toward > and above the Belmont Weather station camera. In all sightings west of > Flagstaff it went DOWNWARD and to the East. > > So the higher cloud appears higher in the sky due to the fact that the > luminous flight began at about 60 miles or so. The smaller more defined cloud > is the lower one to the ground maybe 15 to 20 miles above ground and closer > to the Belmont Weather camera than the more distant larger dispersed portion > of the smoke cloud. > > Do the trig. 13, 7.25 degrees above the horizon and an average between the > two above the horizon taking into account the downward angle of the Fireball > and the average assumed height between the beginning and the end of the event > between 60 and 15 miles above the ground. > > The larger cloud is most likely over 120 miles away from the camera. The > lower one most likely over 70 miles away from the camera. > > And the compass heading of 35-36 degrees is a magnetic heading, keeping in > mind the magnetic variation of 10.5 degrees to East of the the Celestial Pole > which is True North to which my all sky camera is aligned. > > Draw your lines accordingly from the Belmont Weather Station at Navajo Army > Depot along that line of magnetic bearing 35-36 degrees average between the > two 35.5 degrees. If you transpose to a map that is aligned to the true > Celestial North, be sure to take into account the magnetic variation of 10.5 > degrees in drawing the line. > > > Steve Schoner. > ____________________________________________________________ > 2014 Best Skin Tighteners > A Review List of The Top Performing Skin Tighteners In 2014 > http://thirdpartyoffers.netzero.net/TGL3331/54388043c33924301c8st02duc > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list > ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] FW: 10/04/14 AZ Fireball: Sextant-Compass readings of Belmont, AZ smoke tr ail
Dennis Miller via Meteorite-list Fri, 10 Oct 2014 19:31:32 -0700
- [meteorite-list] 10/04/14 AZ Fireball: S... Steve Schoner via Meteorite-list
- [meteorite-list] FW: 10/04/14 AZ Fi... Dennis Miller via Meteorite-list
- Re: [meteorite-list] FW: 10/04/... Michael Farmer via Meteorite-list