PHL 244

All names: PHL 244, UCAC3 144-465950, GALEXJ22229-1819, Gaia DR2 6822573416760233216, UCAC4 359-204801, UCAC2 24991278, TIC 137840206, SBC9 3348, EC 22202-1834, Gaia DR3 6822573416760233216, GALEX J222257.9-181909, 2MASS J22225805-1819100

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 22 22 57.94 22 22 58.06 (0.03)
Declination -18 19 09.20 -18 19 10.03 (0.04)
Spectral type sdB+WD 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] 1.09 (0.07) 1.19 (0.04)
Distance [pc] 916.25 (55) 837.03 (30)
Composition
Proper motion (right ascension) [mas/yr] 9.636 (0.1) 9.8 (0.04)
Proper motion (declination) [mas/yr] -15.73 (0.1) -15.627 (0.04)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 13.65 (0.03)
V magnitude 13.80 (0.03)
R magnitude 14.13 (0.2)
I magnitude
J magnitude 14.39 (0.03) 14.39 (0.03)
H magnitude 14.43 (0.05) 14.43 (0.05)
K magnitude 14.51 (0.09) 14.51 (0.09)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 13.81 (0.0007) 13.79 (0.003)
BP magnitude 13.62 (0.01)
RP magnitude 14.04 (0.003)
Pan g magnitude 13.64 (0.02)
Pan r magnitude 14.04 (0.003)
Pan i magnitude 14.39 (0.002)
Pan z magnitude 14.64 (0.003)
Pan y magnitude 14.81 (0.005)
E(B-V) 0.025

* 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.