SDSS J225158.75+314936.4

All names: SDSS J225158.75+314936.4, SDSS J225158.75+314936.45, GALEX J225158.7+314936, Gaia DR3 1889707205614351872, Gaia EDR3 1889707205614351872, SDSS J225158.75+314936.5, SDSS J225158.73+314936.6, SDSS J225158.74+314936.5, Gaia DR2 1889707205614351872

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Koester & Kepler 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 22 51 58.76 (0.1) 22 51 58.73 22 51 58.76 (0.2) 22 51 58.76 22 51 58.71 (0.1)
Declination 31 49 36.37 (0.2) 31 49 36.62 31 49 36.38 (0.2) 31 49 36.37 31 49 36.75 (0.2)
Spectral type DB DB DB DB DB
Effective temperature [K] 12955.0 11890.0 11123.0 13418.0 (177) 12351.0 (86) 11108.0 (454)
log(g) [cgs] 8.26 8.08 8.00 8.61 (0.1) 8.00 (0) 7.91 (0.08)
Mass [M] 0.747 0.632 0.583 0.969 (0.07) 0.529 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.4713
log(H/He) -6.27 <-5.8
log(C/He)
log(Ca/He) <-9.8
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] 4.11 (0.2) 4.29 (0.2) 4.11 4.11 (0.2)
Distance [pc] 243.24 (11) 232.92 (13) 245.00 243.24 243.24 (11)
Composition He
Proper motion (right ascension) [mas/yr] 40.32030066 (0.2) 40.39002393 (0.4) 40.32 (0.2)
Proper motion (declination) [mas/yr] -23.5859565 (0.2) -24.12320419 (0.3) -23.586 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.78 (0.02) 18.81 (0.02) 18.79 (0.02)
g magnitude 18.73 (0.008) 18.76 (0.01) 18.74 (0.008)
r magnitude 18.91 (0.01) 18.93 (0.01) 18.91 (0.01)
i magnitude 19.08 (0.01) 19.09 (0.02) 19.07 (0.01)
z magnitude 19.28 (0.05) 19.29 (0.05) 19.26 (0.05)
G magnitude 18.82 (0.02) 18.86 18.82 18.82 (0.003)
BP magnitude 18.83 (0.02) 18.82
RP magnitude 18.79 (0.03) 18.83
Pan g magnitude 18.79 (0.005)
Pan r magnitude 18.93 (0.02)
Pan i magnitude 19.12 (0.005)
Pan z magnitude 19.28 (0.02)
Pan y magnitude 19.42 (0.04)
E(B-V) 0.039

* 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.