SDSS J224459.20+310443.2

All names: Gaia DR2 1888850819199025280, Gaia DR3 1888850819199025280, SDSS J224459.20+310443.20, Gaia EDR3 1888850819199025280, SDSS J224459.20+310443.2

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 22 44 59.20 (0.4) 22 44 59.20 22 44 59.20 (0.6) 22 44 59.21 (0.4) 22 44 59.20
Declination 31 04 43.06 (0.6) 31 04 43.21 31 04 43.06 (0.8) 31 04 43.34 (0.6) 31 04 43.22
Spectral type DB DB DB DB+MS
Effective temperature [K] 14043.0 12684.0 9089.0 13869.0 (489)
log(g) [cgs] 7.27 8.58 8.06 7.42 (0.3)
Mass [M] 0.279 0.956 0.615 0.306 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.8718
log(H/He) <-5.986
log(C/He)
log(Ca/He)
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 2.63 (0.8) 2.75 (0.9) 2.63 (0.8)
Distance [pc] 380.62 (116) 363.36 (121) 380.62 (116)
Composition He
Proper motion (right ascension) [mas/yr] -6.934253637 (0.6) -8.658229861 (1) -6.934 (0.6)
Proper motion (declination) [mas/yr] -17.84852075 (0.7) -19.2741701 (1) -17.849 (0.7)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.40 (0.05) 20.38 (0.05) 20.38 (0.05)
g magnitude 20.36 (0.02) 20.36 (0.02) 20.36 (0.02)
r magnitude 20.59 (0.03) 20.61 (0.03) 20.61 (0.03)
i magnitude 20.67 (0.04) 20.75 (0.04) 20.75 (0.04)
z magnitude 20.43 (0.1) 20.48 (0.1) 20.48 (0.1)
G magnitude 20.50 (0.09) 20.56 20.50 (0.008)
BP magnitude 20.34 (0.09) 20.51
RP magnitude 20.06 (0.1) 20.12
Pan g magnitude 20.42 (0.02)
Pan r magnitude 20.60 (0.03)
Pan i magnitude 20.65 (0.02)
Pan z magnitude 20.35 (0.05)
Pan y magnitude 19.83 (0.2)
E(B-V) 0.051

* 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.