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catra

03 Aug 2020 19:05



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ok, am gasit intr-o biblioteca de javascript doua functii pentru calculul precesiei (una mai simpla, alta mai exacta)

https://github.com/MelBartels/AstronomyCalculatorsJavaScript/blob/master/lib/coordLib.js / MLB.coordLib.calcPrecessionQuick / MLB.coordLib.calcPrecessionRigorous

The effect on equatorial coordinates is formally more complicated, and approximately given by
RA  = m + n * sin RA * tan Dec
Dec = n * cos RA
where the constants m and n are the precession components given by
m = + 46.124" + 0.000279" * t
n = + 20.043" - 0.000085" * t


Aplicand corectiile astea ajung si eu aproape de valorile din Stellarium; deci, nesurprinzator, Stellarium calculeaza ok :D

Multumesc pentru indrumare