EC 20450-6947

All names: EC 20450-6947, UCAC4 102-105044, Gaia EDR3 6376187436940164480, Gaia DR3 6376187436940164480, GALEXJ20499-6936, 2MASS J20495426-6936306, Gaia DR2 6376187436940164480, TIC 372172495, WISE J204954.30-693630.7

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 20 49 54.30 (0.02) 20 49 54.06 20 49 54.26 (0.02)
Declination -69 36 31.07 (0.03) -69 36 31.71 -69 36 30.82 (0.03)
Spectral type He-sdO sdO7VIIHe40
Effective temperature [K]
log(g) [cgs]
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 0.68 (0.03) 0.51 (0.06) 0.68 (0.03)
Distance [pc] 1476.01 (72) 1944.77 (209) 1476.01 (72)
Composition
Proper motion (right ascension) [mas/yr] 13.068 (0.03) 13.112 (0.06) 13.068 (0.03)
Proper motion (declination) [mas/yr] -16.096 (0.03) -16.18 (0.08) -16.096 (0.03)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.55
V magnitude 14.99
R magnitude 14.98 (0.04)
I magnitude
J magnitude 15.35 (0.07) 15.35 (0.07)
H magnitude 15.78 (0.2) 15.78 (0.2)
K magnitude 15.12 (0.2) 15.12 (0.2)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.69 (0.003) 14.71 (0.0007) 14.69 (0.003)
BP magnitude 14.54 (0.003) 14.49 (0.01)
RP magnitude 14.98 (0.004) 14.98 (0.002)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.033

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.