Minimum working example demonstrating that setting Gaia.MAIN_GAIA_TABLE
does not lead to EDR3 results:
import astropy.coordinates as coord
import astropy.units as u
from astroquery.gaia import Gaia
Gaia.MAIN_GAIA_TABLE = 'gaiaedr3.gaia_source'
result_tbl = Gaia.query_object(coord.SkyCoord(37.65032*u.deg,
89.26089*u.deg),
radius=4*u.arcsec)
print(result_tbl['designation'])
(Outputs a Gaia DR2 designation)
astroquery v0.4.2