Lunation Number

Lunation Number

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

Perhaps the most commonly used is the Brown Lunation Number, which defines lunation 1 as beginning at the first new moon of 1923 (this occured 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 occured 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 since the beginning of the Islamic Calendar on July 16, 622. It can be calculated using ILM = 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", and can be calculated using GLN = LN + 37105.

External links

* [http://www.astrostar.com/MoonPhases.htm Table of recent and upcoming lunation numbers]
* [http://scienceworld.wolfram.com/astronomy/Lunation.html Lunation number in ScienceWorld]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • lunation — noun a) a month of approximately 29.53 days, measured from a lunar phase until the return of that same phase. On average, the number of days between Full Moons is about 29.5306 days. The actual number of days may differ from the average number by …   Wiktionary

  • Maya calendar — Maya civiliza …   Wikipedia

  • Julian day — JDN redirects here. For the military IT system, see Joint Data Network. For the comic book character Julian Gregory Day, see Calendar Man. Not to be confused with Julian year (disambiguation). Julian day is used in the Julian date (JD) system of… …   Wikipedia

  • calendar — calendrical /keuh len dri keuhl/, calendric, calendarial /kal euhn dair ee euhl/, calendarian, calendaric, adj. /kal euhn deuhr/, n. 1. a table or register with the days of each month and week in a year: He marked the date on his calendar. 2. any …   Universalium

  • Hindu chronology — The subject of Hindu chronology divides naturally into three parts: the calendar, the eras, and other reckonings. The Calendar The Hindus have had, from very ancient times, the system of lunisolar cycles, made by the combination of solar years,… …   Wikipedia

  • Full moon cycle — The full moon cycle is a cycle of about 14 lunations over which full moons vary in apparent size and age (time since new moon). The sequence is *Full moon big (perigee at full moon) *Full moon young (perigee at first quarter) *Full moon small… …   Wikipedia

  • Epact — • The surplus days of the solar over the lunar year; hence, more freely, the number of days in the age of the moon on 1 January of any given year. The whole system of epacts is based on the Metonic Lunar Cycle, and serves to indicate the days of… …   Catholic encyclopedia

  • New moon — For other uses, see New moon (disambiguation). The new moon phase In astronomical terminology, the new moon is the lunar phase that occurs when the Moon, in its monthly orbital motion around Earth, lies between Earth and the Sun, and is therefore …   Wikipedia

  • CALENDAR — (Heb. לוּחַ, lu aḥ). The present Jewish calendar is lunisolar, the months being reckoned according to the moon and the years according to the sun. A month is the period of time between one conjunction of the moon with the sun and the next. The… …   Encyclopedia of Judaism

  • Computus — (Latin for computation ) is the calculation of the date of Easter in the Christian calendar. The name has been used for this procedure since the early Middle Ages, as it was one of the most important computations of the age. In principle, the… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”