KPD 2254+5444

All names: Gaia DR3 2002880555945732992, 2MASS J22570265+5500134, UCAC4 726-096657, TIC 389344798, KPD 2254+5444, Gaia DR2 2002880555945732992, KPD2254+5444

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 22 57 02.59 22 57 02.65 (0.02)
Declination 55 00 13.75 55 00 13.43 (0.01)
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] 1.46 (0.03) 1.41 (0.02)
Distance [pc] 686.62 (15) 709.87 (10)
Composition
Proper motion (right ascension) [mas/yr] 4.718 (0.05) 4.814 (0.02)
Proper motion (declination) [mas/yr] 1.57 (0.05) 1.472 (0.02)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.46 (0.01)
V magnitude 14.37 (0.01)
R magnitude 14.54 (0.09)
I magnitude
J magnitude 14.44 (0.07) 14.44 (0.07)
H magnitude 14.39 (0.06) 14.39 (0.06)
K magnitude 13.66
u magnitude
g magnitude 14.42 (0.01)
r magnitude 14.38 (0.01)
i magnitude 14.58 (0.01)
z magnitude
G magnitude 14.38 (0.0004) 14.37 (0.003)
BP magnitude 14.33 (0.007)
RP magnitude 14.35 (0.002)
Pan g magnitude 14.38 (0.004)
Pan r magnitude 14.50 (0.002)
Pan i magnitude 14.70 (0.003)
Pan z magnitude 14.86 (0.001)
Pan y magnitude 14.96 (0.002)
E(B-V) 0.159

* 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.