USNO-B1.0 0989-00223202

All names: Gaia EDR3 3903010332913824000, USNO-B1.0 0989-00223202, SDSS J123750.47+085526.0, GALEX J123750.5+085526, SDSS J123750.46+085526.0, Gaia DR2 3903010332913824000, SDSS J123750.47+085526.00, Gaia DR3 3903010332913824000, WD 1235+091

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Eisenstein et al. 2006 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 37 50.45 (0.2) 12 37 50.47 12 37 50.45 (0.3) 12 37 50.46 12 37 50.47 (0.2) 12 37 50.06 12 37 50.47
Declination 08 55 25.99 (0.2) 08 55 26.03 08 55 25.99 (0.2) 08 55 26.08 08 55 26.01 (0.2) 08 55 18.48 08 55 26.03
Spectral type DB DB DB DB DB DB DB+MS
Effective temperature [K] 32308.0 (856) 29566.0 29909.0 26093.0 31300.0 (800) 29682.0 (979)
log(g) [cgs] 7.75 (0.09) 7.97 8.14 8.06 7.82 (0.1) 7.81 (0.1)
Mass [M☉] 0.5 (0.04) 0.6 0.698 0.645 0.52 (0.05)
log(Luminosity) [L☉] -0.63 (0.07)
Cooling age [Gyr] 0.0071 (0.0009) 0.0213
log(H/He) <-3.481
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] 1.54 (0.2) 1.91 (0.3) 1.54 (0.2)
Distance [pc] 649.68 (105) 523.32 (94) 649.69 (105)
Composition He He
Proper motion (right ascension) [mas/yr] -13.47171687 (0.3) -13.79320102 (0.7) -13.472 (0.3)
Proper motion (declination) [mas/yr] -1.105791326 (0.3) -1.345930762 (0.4) -1.106 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 19.90 (0.2)
H magnitude
K magnitude
u magnitude 18.64 (0.02) 18.62 (0.03) 18.64 (0.02) 18.62 18.63 (0.03)
g magnitude 18.84 (0.009) 18.84 (0.02) 18.84 (0.009) 18.84 18.87 (0.02)
r magnitude 19.28 (0.01) 19.31 (0.03) 19.28 (0.01) 19.31 19.33 (0.03)
i magnitude 19.54 (0.02) 19.62 (0.05) 19.54 (0.02) 19.62 19.62 (0.05)
z magnitude 19.94 (0.1) 19.96 (0.1) 19.93 (0.1) 19.96 19.96 (0.1)
G magnitude 19.07 (0.02) 19.12 19.07 (0.004)
BP magnitude 18.97 (0.02) 18.90
RP magnitude 19.26 (0.05) 19.32
Pan g magnitude 18.91 (0.008)
Pan r magnitude 19.28 (0.01)
Pan i magnitude 19.65 (0.01)
Pan z magnitude 19.88 (0.03)
Pan y magnitude 19.88 (0.05)
E(B-V) 0.024

* 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.