USNO-B1.0 0916-00171635

All names: WD 0846+018, USNO-B1.0 0916-00171635, GALEX J084916.2+013721, Gaia EDR3 3075847013784199936, Gaia DR3 3075847013784199936, Gaia DR2 3075847013784199936, SDSS J084916.18+013721.2, SDSS J084916.18+013721.3, SDSS J084916.18+013721.30

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 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 08 49 16.18 (0.3) 08 49 16.18 08 49 16.18 (0.5) 08 49 16.18 08 49 16.18 (0.3) 08 49 16.22 08 49 16.18
Declination 01 37 20.97 (0.2) 01 37 21.26 01 37 20.98 (0.3) 01 37 21.27 01 37 21.31 (0.2) 01 37 19.56 01 37 21.27
Spectral type DB DB DB DB DB DB
Effective temperature [K] 28924.0 24329.0 24190.0 29400.0 (1000) 27347.0 (1157)
log(g) [cgs] 7.75 7.68 7.71 7.72 (0.1) 7.75 (0.1)
Mass [M] 0.488 0.449 0.461 0.492 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.0205
log(H/He) <-3.548
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] 1.01 (0.4) 1.26 (0.5) 1.01 (0.4)
Distance [pc] 989.36 (362) 795.31 (321) 989.41 (362)
Composition He
Proper motion (right ascension) [mas/yr] -0.003604418 (0.5) -1.38487561 (0.9) -0.004 (0.5)
Proper motion (declination) [mas/yr] -21.32114923 (0.3) -20.46150415 (0.5) -21.321 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.29 (0.03) 19.30 (0.03) 19.29 (0.03) 19.29 19.30 (0.03)
g magnitude 19.42 (0.01) 19.45 (0.02) 19.42 (0.01) 19.45 19.45 (0.02)
r magnitude 19.77 (0.02) 19.80 (0.03) 19.77 (0.02) 19.80 19.79 (0.03)
i magnitude 20.02 (0.04) 20.05 (0.04) 20.02 (0.04) 20.05 20.05 (0.04)
z magnitude 20.54 (0.2) 20.54 (0.2) 20.54 (0.2) 20.54 20.53 (0.2)
G magnitude 19.57 (0.04) 19.62 19.57 (0.004)
BP magnitude 19.50 (0.04) 19.43
RP magnitude 19.68 (0.05) 19.70
Pan g magnitude 19.43 (0.02)
Pan r magnitude 19.74 (0.02)
Pan i magnitude 20.04 (0.02)
Pan z magnitude 20.35 (0.02)
Pan y magnitude
E(B-V) 0.030

* 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.