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Stellarium program moon phase8/30/2023 ![]() So it has read the aa.ini file and you can see its content listed, thenĪnd I set it to 1 days result at 1 day intervalsĪnd choose planet no 3 (which happens to be the moon) Planet number 0-9 or 88 to read star, 99 to read orbit (0) ? 3 ![]() Planetary and lunar positions approximate DE404.ġ066 October 14 Saturday 8h 39m 10.734s UTġ066 October 14 Saturday 9h 00m 00.000s TDTĮnter interval between tabulations in days (1.000000) ? Here are the questions Steve Moshier's Ephemeris Program v5.6 aa is one of those old fashioned so called interactive programs… the sort of thing you might have used in the 1970’s sitting at a teletype on a minicomputer. Put this in a clean directory, then cd cleandirectory Here is my aa.ini file for Hastings in the UK 0.5734 Terrestrial east longitude of observer, degreesġ 0 - TDT=UT, 1 - input=TDT, 2 - input=UTĠ.0 Use this deltaT (sec) if nonzero, else compute it. To run aa you need an aa.ini file defining the location ( on earths surface) of interest. You will get a binary in /usr/bin, files in /usr/share/doc/astronomical-almanac, and more files in /usr/share/aa,Īnd a global init file in /etc/aa.ini. ![]() ![]() We will need these data to setup aa for that location.Īa is available in Debian as the package astronomical-almanac so it installs with Hastings is at latitude 50.85 degrees and Longitude 0.5734 degrees. Have you ever needed to know where the moon was during the Battle of Hastings? Probably not, but there is a marvellous piece of software which goes by the unassuming name of aa which can compute the position in the sky of any planet, sun, moon, or star, in any year/date, and at any time.Īs an example we are going to use aa to find where the Moon was during the Battle of Hastings. ![]()
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