SDSS J081546.08+244603.3

All names: GALEX J081546.0+244604, SDSS J081546.08+244603.2, WD 0812+249, USNO-B1.0 1147-00153894, Gaia EDR3 679295777043705216, SDSS J081546.08+244603.3, Gaia DR2 679295777043705216, Gaia DR3 679295777043705216

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 MWDD H Gaia DR2 Stilism Eisenstein et al. 2006 Hugelmeyer et al. 2006 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 15 46.08 (0.2) 08 15 46.08 08 15 46.08 (0.3) 08 15 46.09 08 15 46.08 (0.2) 08 15 45.50 08 15 46.08
Declination 24 46 03.25 (0.1) 24 46 03.29 24 46 03.25 (0.1) 24 46 03.29 24 46 03.25 (0.1) 24 45 57.96 24 46 03.29
Spectral type DO DO DO DO DO DO DO DB
Effective temperature [K] 46468.0 (580) 28111.0 45500.0 (400) 48000.0 (200) 46753.0 (260)
log(g) [cgs] 7.89 (0.1) 7.45 7.72 (0.09) 8.20 (0.01) 7.74 (0.1)
Mass [M] 0.59 (0.07) 0.407 0.76
log(Luminosity) [L] -0.06 (0.1)
Cooling age [Gyr] 0.0028 (0.0002) 0.0118
log(H/He)
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] 0.81 (0.2) 1.21 (0.4) 0.81 (0.2)
Distance [pc] 1232.71 (349) 824.27 (248) 1232.74 (349)
Composition He
Proper motion (right ascension) [mas/yr] -5.997337961 (0.2) -5.655503072 (0.6) -5.997 (0.2)
Proper motion (declination) [mas/yr] 0.358226103 (0.2) 0.238250506 (0.3) 0.358 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.17
V magnitude 18.82
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.16 (0.01) 18.17 (0.02) 18.16 (0.01) 18.59 18.15 (0.02)
g magnitude 18.57 (0.008) 18.59 (0.02) 18.57 (0.008) 18.59 18.59 (0.02)
r magnitude 19.02 (0.01) 19.05 (0.02) 19.02 (0.01) 19.04 (0.02)
i magnitude 19.38 (0.02) 19.40 (0.03) 19.38 (0.02) 19.39 (0.03)
z magnitude 19.62 (0.08) 19.65 (0.08) 19.62 (0.08) 19.64 (0.08)
G magnitude 18.81 (0.03) 18.86 18.81 (0.004)
BP magnitude 18.67 (0.03) 18.57
RP magnitude 19.04 (0.04) 19.06
Pan g magnitude 18.62 (0.009)
Pan r magnitude 19.06 (0.007)
Pan i magnitude 19.43 (0.01)
Pan z magnitude 19.69 (0.01)
Pan y magnitude 19.92 (0.05)
E(B-V) 0.034

* 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.