How to calculate the phase angle between satellite and sun with the use of skyfield

Asked Sep 27 '21 at 10:56

Active Sep 28 '21 at 16:28

Viewed 308 times

With the discussion that took place on answer(s) to How to calculate cone angle between two satellites given their look angles? I would like to ask if my proposal solving that question works like intended:

sun = ephemeris['sun']
earth = ephemeris['earth']
vecObserverSat = (s1 - loc).at(tEv)
vecObsserverSun = (sun - (earth + loc)).at(tEv)
phase = vecObserverSat.separation_from(vecObserverSun)

edited Sep 28 '21 at 16:28

asked Sep 27 '21 at 10:56

mworion

2

You may find some helpful information in Astronomy SE in answers to Calculating the apparent magnitude of a satellite and Venus' magnitude during inferior conjunction and What is the difference between albedo, absolute magnitude or apparent magnitude? and Why is Enceladus's albedo greater than 1? – uhoh Sep 27 '21 at 11:31
I vote to close this question because the context explained in the body of the question does not match the question itself. To me, the linkage with the previous question ("cone angle between two satellites") is not well explained. – Ng Ph Sep 27 '21 at 14:59
Sorry about the mismatch, I corrected the question – mworion Sep 28 '21 at 16:29
Makes sense. Thanks – Ng Ph Sep 29 '21 at 13:58

How to calculate the phase angle between satellite and sun with the use of skyfield

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