EC 20034-5404

All names: EC20034-5404, GALEX J200719.9-535548, EC 20034-5404, Gaia DR2 6473242152957486592, UCAC4 181-215222, 2MASS J20071990-5355488, TIC 422043417, Gaia DR3 6473242152957486592, Gaia EDR3 6473242496554258304

Parameter Unit Gaia EDR3 Geier 2020 Stilism Simbad
Right ascension 20 07 30.43 (0.7) 20 07 19.85 20 07 19.91 (0.04)
Declination -53 54 56.54 (0.8) -53 55 48.47 -53 55 48.85 (0.03)
Spectral type sdB sdB
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] 1.20 (1) 0.40 (0.07) 0.46 (0.05)
Distance [pc] 835.49 (807) 2516.99 (459) 2176.75 (242)
Composition
Proper motion (right ascension) [mas/yr] -10.223 (1) 3.122 (0.1) 3.137 (0.04)
Proper motion (declination) [mas/yr] -7.712 (1) -0.368 (0.09) -0.254 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.49
V magnitude 15.69
R magnitude 15.87 (0.09)
I magnitude
J magnitude 16.44 (0.1) 16.44 (0.1)
H magnitude 15.97 (0.2) 15.97 (0.2)
K magnitude 15.44
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 20.73 (0.01) 15.69 (0.001) 15.68 (0.003)
BP magnitude 20.92 (0.2) 15.50 (0.008)
RP magnitude 20.07 (0.2) 15.92 (0.003)
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.030

* 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.