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#1
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Which calendar is correct?
According to hebcal.com,
March 27, 1906 is the 1st day of the Hebrew month of Nisan, which would be the new moon after the equinox. April 9, 1906 is Nisan 14, Passover. See: http://www.hebcal.com/hebcal/?year=1....cgifields=set Now, according to the Naval Observatory, March *24*, 1906 represents the New moon. See: http://aa.usno.navy.mil/cgi-bin/aa_m...r=1906&ZZZ=END Which is correct? Can anyone offer any explanation as to why there's an offset between the new moon information of hebcal.com and the Observatory? |
#2
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Which calendar is correct?
On 23 Mar 2006 09:38:07 -0800, "RB" wrote:
According to hebcal.com, March 27, 1906 is the 1st day of the Hebrew month of Nisan, which would be the new moon after the equinox. April 9, 1906 is Nisan 14, Passover. See: http://www.hebcal.com/hebcal/?year=1....cgifields=set Now, according to the Naval Observatory, March *24*, 1906 represents the New moon. See: http://aa.usno.navy.mil/cgi-bin/aa_m...r=1906&ZZZ=END Which is correct? Can anyone offer any explanation as to why there's an offset between the new moon information of hebcal.com and the Observatory? The Naval Observatory data is correct. Doesn't the Hebrew calendar define the New Moon based on visibility? After all, when the calendar was established people didn't know how to calculate exactly when the New Moon would occur. If so, March 27 sounds about right for a New Moon that occurred around midnight on March 24/25. _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
#3
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Which calendar is correct?
On 2006-03-23, RB wrote:
According to hebcal.com, March 27, 1906 is the 1st day of the Hebrew month of Nisan, which would be the new moon after the equinox. April 9, 1906 is Nisan 14, Passover. See: http://www.hebcal.com/hebcal/?year=1....cgifields=set Now, according to the Naval Observatory, March *24*, 1906 represents the New moon. See: http://aa.usno.navy.mil/cgi-bin/aa_m...r=1906&ZZZ=END Which is correct? Can anyone offer any explanation as to why there's an offset between the new moon information of hebcal.com and the Observatory? The Jewish calendar is based on a calculated lunar cycle, not the astronomical new moon. The calendrical new moonth is not necessarily on the date of the astronomical new moon. It's done that way because the new moon isn't always observable. -- The night is just the shadow of the Earth. |
#4
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Which calendar is correct?
Thanks for both of your replies. That definitely shines light on it.
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#5
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Which calendar is correct?
JRS: In article .com
, dated Thu, 23 Mar 2006 09:38:07 remote, seen in news:sci.astro.amateur, RB posted : According to hebcal.com, March 27, 1906 is the 1st day of the Hebrew month of Nisan, which would be the new moon after the equinox. April 9, 1906 is Nisan 14, Passover. See: http://www.hebcal.com/hebcal/?year=1...&o=on&s=on& i =on&vis=on&D=on&d=on&set=on&heb=on&c=off&geo=zip& zip=&m=72&.s=Get+Calendar&.cgif ields=nx&.cgifields=nh&.cgifields=set Now, according to the Naval Observatory, March *24*, 1906 represents the New moon. See: http://aa.usno.navy.mil/cgi-bin/aa_m...r=1906&ZZZ=END Which is correct? Can anyone offer any explanation as to why there's an offset between the new moon information of hebcal.com and the Observatory? Which Naval Observatory? There are many Navies. The NO is doubtless reporting the actual New Moon, and may be doing so in Local Time. The Hebrew Calendar uses a theoretical approximation to the visible Moon, in Jerusalem Time. The Islamic Calendars use different approximations to the visible New Moon, in Local or Mecca Time IIRC. One should not expect full agreement between calendars and the Solar System. Nisan is not locked to the Equinox, since the average length of the Hebrew Year is not exactly right; it makes a complete cycle of the seasons in about 85000 years (the Gregorian Calendar is not locked either, cycling in around 10000000 years). URL:http://www.merlyn.demon.co.uk/heb-date.htm and references. -- © John Stockton, Surrey, UK. Turnpike v4.00 MIME. © Web URL:http://www.merlyn.demon.co.uk/ - w. FAQish topics, links, acronyms PAS EXE etc : URL:http://www.merlyn.demon.co.uk/programs/ - see 00index.htm Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc. |
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