astropy.coordinates.get_sun(time)[source] [edit on github]

Determines the location of the sun at a given time (or times, if the input is an array Time object), in geocentric coordinates.


time : Time

The time(s) at which to compute the location of the sun.


newsc : SkyCoord

The location of the sun as a SkyCoord in the GCRS frame.


The algorithm for determining the sun/earth relative position is based on the simplified version of VSOP2000 that is part of ERFA. Compared to JPL’s ephemeris, it should be good to about 4 km (in the Sun-Earth vector) from 1900-2100 C.E., 8 km for the 1800-2200 span, and perhaps 250 km over the 1000-3000.