World Library  
Flag as Inappropriate
Email this Article

Lunation Number

Article Id: WHEBN0004565290
Reproduction Date:

Title: Lunation Number  
Author: World Heritage Encyclopedia
Language: English
Subject: Julian day, Lunation, Ernest William Brown
Publisher: World Heritage Encyclopedia

Lunation Number

Lunation Number or Lunation Cycle is a number given to each lunation beginning from a certain one in history. There are several series of lunation numbers in use.

The most commonly used is the Brown Lunation Number, which defines lunation 1 as beginning at the first new moon of 1923, the year when Ernest William Brown's lunar theory was introduced in the major national astronomical almanacs. Lunation 1 occurred at approximately 02:41 UTC, January 17, 1923.

Another increasingly popular lunation number (simply called the Lunation Number), introduced by Jean Meeus, defines lunation 0 as beginning on the first new moon of 2000 (this occurred at approximately 18:14 UTC, January 6, 2000). The formula relating this Lunation Number with the Brown Lunation Number is: BLN = LN + 953.

The Islamic Lunation Number is the count of lunations in the Islamic calendar with lunation 1 as beginning on July 16, 622. It can be calculated using ILN = LN + 17038.

The Goldstine Lunation Number refers to the lunation numbering used by Herman Goldstine in his 1973 book New and Full Moons: 1001 B.C. to A.D. 1651, with lunation 0 beginning on January 11, 1001 BC, and can be calculated using GLN = LN + 37105.

The Hebrew Lunation Number is the count of lunations in the Hebrew calendar with lunation 1 beginning on October 7, 3761 BC. It can be calculated using HLN = LN + 71234.

The Thai Lunation Number is called "มาสเกณฑ์" (Maasa-Kendha), defines lunation 0 as beginning of the SouthEast-Asian Calendar on Sunday March 22, 638 (Julian Calendar). It can be calculated using TLN = LN + 16843.

External links

  • Lunation number in ScienceWorld

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.