FBS 0021+418

All names: GALEX J002355.2+420905, TIC 440171028, FBS B 206, FBS 0021+418, LAMOST J002355.23+420905.5, 2MASS J00235521+4209053, Gaia DR3 382086995098288896, FBS0021+418, Gaia DR2 382086995098288896

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 00 23 55.22 00 23 55.22 (0.04)
Declination 42 09 04.90 42 09 05.35 (0.02)
Spectral type sdB sdBHe6
Effective temperature [K] 29234.0 (408)
log(g) [cgs] 5.35 (0.07)
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 0.22 (0.07) 0.39 (0.05)
Distance [pc] 4593.48 (1433) 2580.65 (316)
Composition
Proper motion (right ascension) [mas/yr] 6.779 (0.08) 6.771 (0.04)
Proper motion (declination) [mas/yr] 9.233 (0.04) 9.176 (0.03)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.17
V magnitude 16.40
R magnitude
I magnitude
J magnitude 16.29 (0.1) 16.29 (0.1)
H magnitude 16.31 (0.2) 16.31 (0.2)
K magnitude 16.06
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 15.79 (0.0006) 15.77 (0.003)
BP magnitude 15.62 (0.004)
RP magnitude 16.00 (0.002)
Pan g magnitude 15.62 (0.003)
Pan r magnitude 16.00 (0.002)
Pan i magnitude 16.32 (0.003)
Pan z magnitude 16.58 (0.002)
Pan y magnitude 16.73 (0.008)
E(B-V) 0.071

* 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.