emamajek on 14-Mar-2019 22:11:05 GMT about WASP-45
WASP-45 has stellar companion at 4.4" separation (binary is WDS J00209-3600 in Washington Double Star Catalog), which Evans+2018 (2018A&A...610A..20E) concludes is a physical companion. Here are Gaia DR2 parameters, and assigning "A" and "B" to the components of WDS J00209-3600:
A: WASP-45 A = Gaia DR2 2308834780352875904
RA, Dec = 005.23775666181, -35.99846503966 (ICRS, epoch 2015.5)
plx = 4.7064 +- 0.0390 mas
pmRA, pmDec = 52.895, -46.887 (+-0.049, 0.036) mas/yr
G = 12.0487 +- 0.0002
B: WASP-45 B = Gaia DR2 2308834784647991168
RA, Dec = 005.23674825181, -35.99756534993 (ICRS, epoch 2015.5)
plx = 4.2968 +- 0.3656 mas
pmRA, pmDec = 50.732, -48.901 (+-0.484, 0.357) mas/yr
G = 19.0074 +- 0.0034
The absolute magnitude of the companion is consistent with a mid-M dwarf,
and Evans+2018 estimates a photometric Teff of 3020+-90K.
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