USNO-B1.0 1213-00153639

All names: Gaia DR2 880081095788954240, WD 0742+314, GALEX J074538.1+312205, SDSS J074538.17+312205.4, USNO-B1.0 1213-00153639, SDSS J074538.17+312205.40, EQ J0745+3122, SDSS J074538.17+312205.3, SDSS J074538.16+312205.3, Gaia EDR3 880081095788954240, Gaia DR3 880081095788954240

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD H 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 07 45 38.13 (0.2) 07 45 38.17 07 45 38.13 (0.3) 07 45 38.17 07 45 38.18 (0.2) 07 45 38.42 07 45 38.17
Declination 31 22 05.24 (0.2) 31 22 05.35 31 22 05.25 (0.2) 31 22 05.38 31 22 05.39 (0.2) 31 22 04.44 31 22 05.41
Spectral type DBA DO DO DO DO DO DB DB
Effective temperature [K] 41854.0 (4661) 47975.0 37206.0 20123.0 24538.0 47200.0 (500) 50000.0 (645)
log(g) [cgs] 8.16 (0.4) 7.81 7.96 7.44 7.62 7.73 (0.1) 8.60 (0.2)
Mass [M] 0.72 (0.2) 0.557 0.606 0.375 0.427 0.985 (0.1)
log(Luminosity) [L] -0.42 (0.3)
Cooling age [Gyr] 0.0034 (0.001) 0.0220 0.0197
log(H/He) <-3.13
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] 1.44 (0.3) 1.44 (0.4) 1.44 (0.3)
Distance [pc] 696.75 (144) 695.63 (192) 696.77 (144)
Composition He
Proper motion (right ascension) [mas/yr] -38.57699943 (0.3) -39.27340136 (0.7) -38.577 (0.3)
Proper motion (declination) [mas/yr] -9.238873001 (0.2) -9.328947079 (0.4) -9.239 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.48
V magnitude 19.11
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.62 (0.02) 18.59 (0.02) 18.61 (0.02) 18.59 18.59 (0.02)
g magnitude 18.89 (0.009) 18.91 (0.01) 18.89 (0.009) 18.91 18.91 (0.01)
r magnitude 19.30 (0.01) 19.35 (0.02) 19.30 (0.01) 19.33 (0.02)
i magnitude 19.61 (0.02) 19.64 (0.02) 19.61 (0.02) 19.63 (0.02)
z magnitude 19.87 (0.08) 19.89 (0.08) 19.87 (0.08) 19.88 (0.09)
G magnitude 19.12 (0.03) 19.17 19.12 (0.004)
BP magnitude 19.01 (0.03) 18.88
RP magnitude 19.20 (0.05) 19.13
Pan g magnitude 18.98 (0.01)
Pan r magnitude 19.34 (0.007)
Pan i magnitude 19.66 (0.01)
Pan z magnitude 19.95 (0.04)
Pan y magnitude 19.67 (0.1)
E(B-V) 0.040

* 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.