Hi, it can be done as follows: 1. Get Y (year's number) from the closest 19-year circle: 1995 - 1, 1996 - 2,... 2012 - 18, 2013 - 19, 2014 - again 1. Assuming D (day) and M (month) in its civil meaning, you will get L (Moon age in days, 15 - full) from the equation: L = mod 30 (11Y + D + M - 14),
Best regards, Alexei Kroutiakov N 56.04 E 37.589 >Вторник, 8 декабря 2015, 12:00 +01:00 от sundial-requ...@uni-koeln.de: > >Send sundial mailing list submissions to >sundial@uni-koeln.de > >To subscribe or unsubscribe via the World Wide Web, visit >https://lists.uni-koeln.de/mailman/listinfo/sundial >or, via email, send a message with subject or body 'help' to >sundial-requ...@uni-koeln.de > >You can reach the person managing the list at >sundial-ow...@uni-koeln.de > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of sundial digest..." > > >Today's Topics: > > 1. Calculating age of the moon from the epact (graham stapleton) > 2. RE: Calculating age of the moon from the epact (Dave Bell) > 3. Re: Calculating age of the moon from the epact (Steve Lelievre) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Mon, 7 Dec 2015 15:15:40 +0000 (UTC) >From: graham stapleton < manaeus2...@yahoo.co.uk > >To: " sundial@uni-koeln.de " < sundial@uni-koeln.de > >Subject: Calculating age of the moon from the epact >Message-ID: >< 811103497.27237233.1449501340762.javamail.ya...@mail.yahoo.com > >Content-Type: text/plain; charset="utf-8" > >Dear All, >The origin of my query is the seamen's boxes of Pieter Holm that feature a >table enabling a calculation from the epact - integers only - of the >(approximate) age of the moon. > >Attempting to use the illustrated figures for the current year has been >unsuccesful and a general trawl of the web has not provided anything that >helps.? A method applicable for any date would be ideal, but at least for the >first of the month.? Thank you. > >Using the Tables on the Seaman's Tobacco Box of Pieter Holm > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: < >https://lists.uni-koeln.de/mailman/private/sundial/attachments/20151207/e761b3d1/attachment-0001.html > > > >------------------------------ > >Message: 2 >Date: Mon, 7 Dec 2015 19:46:12 -0800 >From: "Dave Bell" < db...@thebells.net > >To: "'graham stapleton'" < manaeus2...@yahoo.co.uk >, >< sundial@uni-koeln.de > >Subject: RE: Calculating age of the moon from the epact >Message-ID: <677F9E5291AC48309547C1865F8F5011@DaveQuad> >Content-Type: text/plain; charset="us-ascii" > >I admit it was tricky figuring out how to read the tables, but I *think* I >have it working for the current year. > > > >December 3rd (same day of week as January 1st) shows a lunar age of 10 days. > >Adding the Gregorian epact of 10 (*), plus 4 days between the 3rd and today, >gives an age of 24 days. > >Next New Moon is December 11th (**), 4 more days from now = 28 days old, or >New Moon. > > > >Dave > > > >(*) http://www.staff.science.uu.nl/~gent0113/easter/eastercalculator.htm > >(**) http://www.moongiant.com/phase/12/9/2015 > > > > _____ > >From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of graham >stapleton >Sent: Monday, December 07, 2015 7:16 AM >To: sundial@uni-koeln.de >Subject: Calculating age of the moon from the epact > > > >Dear All, > > > >The origin of my query is the seamen's boxes of Pieter Holm that feature a >table enabling a calculation from the epact - integers only - of the >(approximate) age of the moon. > > > >Attempting to use the illustrated figures for the current year has been >unsuccesful and a general trawl of the web has not provided anything that >helps. A method applicable for any date would be ideal, but at least for >the first of the month. Thank you. > > > >Using the Tables on the Seaman's Tobacco Box of Pieter Holm >< http://www.staff.science.uu.nl/%7Egent0113/holmbox/holmboxtables.htm > > > > > < http://www.staff.science.uu.nl/%7Egent0113/holmbox/holmboxtables.htm > > > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: < >https://lists.uni-koeln.de/mailman/private/sundial/attachments/20151207/6fabac49/attachment-0001.html > > > >------------------------------ > >Message: 3 >Date: Mon, 7 Dec 2015 22:03:44 -0800 >From: Steve Lelievre < steve.lelievre.can...@gmail.com > >To: "'graham stapleton'" < manaeus2...@yahoo.co.uk > >Cc: sundial@uni-koeln.de >Subject: Re: Calculating age of the moon from the epact >Message-ID: < 566672c0.2010...@gmail.com > >Content-Type: text/plain; charset="windows-1252"; Format="flowed" > >Hi, > >I worked on the basis that if the day of a New Moon is counted as age 1, >the next one happens on the day with age 30 (the lunar month is 29 days, >so age 30 is the same as age 1). Thus finding New Moon in the desired >month can be achieved by finding the day with age 30, as follows: >- Take the Age value for the required calendar month from the table. For >December, the value is 10. >- Add the Epact, which for 2015 is also 10, making 20. >- To get our total up to 30 requires that a further 10 is added, which >is achieved by moving 10 days into December; December 1st plus 10 days >is December 11th. > >This is same answer as Dave Bell derived, and I hope it wasn't just a >lucky fluke (was it?). > >Steve > > > >On 07/12/2015 19:46, Dave Bell wrote: >> >> I admit it was tricky figuring out how to read the tables, but I >> **think** I have it working for the current year. >> >> December 3^rd (same day of week as January 1^st ) shows a lunar age of >> 10 days. >> >> Adding the Gregorian epact of 10 (*), plus 4 days between the 3^rd and >> today, gives an age of 24 days. >> >> Next New Moon is December 11^th (**), 4 more days from now = 28 days >> old, or New Moon. >> >> Dave >> >> (*) http://www.staff.science.uu.nl/~gent0113/easter/eastercalculator.htm >> >> (**) http://www.moongiant.com/phase/12/9/2015 >> >> ------------------------------------------------------------------------ >> >> *From:*sundial [mailto:sundial-boun...@uni-koeln.de] *On Behalf Of >> *graham stapleton >> *Sent:* Monday, December 07, 2015 7:16 AM >> *To:* sundial@uni-koeln.de >> *Subject:* Calculating age of the moon from the epact >> >> Dear All, >> >> The origin of my query is the seamen's boxes of Pieter Holm that >> feature a table enabling a calculation from the epact - integers only >> - of the (approximate) age of the moon. >> >> Attempting to use the illustrated figures for the current year has >> been unsuccesful and a general trawl of the web has not provided >> anything that helps. A method applicable for any date would be ideal, >> but at least for the first of the month. Thank you. >> >> Using the Tables on the Seaman's Tobacco Box of Pieter Holm >> < http://www.staff.science.uu.nl/%7Egent0113/holmbox/holmboxtables.htm > >> >> >> < http://www.staff.science.uu.nl/%7Egent0113/holmbox/holmboxtables.htm > >> >> >> >> --------------------------------------------------- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: < >https://lists.uni-koeln.de/mailman/private/sundial/attachments/20151207/9362f1f7/attachment-0001.html > > > >------------------------------ > >Subject: Digest Footer > >_______________________________________________ >sundial mailing list >sundial@uni-koeln.de >https://lists.uni-koeln.de/mailman/listinfo/sundial > > >------------------------------ > >End of sundial Digest, Vol 120, Issue 7 >*************************************** Алексей Крутяков, www.analemma.ru 007 (495) 720-24-XII
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