SDSS J085434.16+563713.9

All names: SDSS J085434.16+563713.90, Gaia DR3 1037002639390652032, Gaia EDR3 1037002639390652032, SDSS J085434.16+563713.9, Gaia DR2 1037002639390652032, SDSS J085434.17+563713.9, GALEX J085434.0+563714, WD 0850+568

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 54 34.20 (0.6) 08 54 34.17 08 54 34.20 (0.9) 08 54 34.17 (0.6) 08 54 34.17 08 54 33.96 08 54 34.16
Declination 56 37 14.06 (0.5) 56 37 13.91 56 37 14.06 (0.7) 56 37 13.97 (0.5) 56 37 13.92 56 37 10.56 56 37 13.92
Spectral type DB DB DB DB DB DB
Effective temperature [K] 17242.0 17839.0 12324.0 18241.0 (753) 18674.0 (1176)
log(g) [cgs] 7.89 7.70 7.03 7.90 (0.3) 7.93 (0.3)
Mass [M] 0.534 0.439 0.219
log(Luminosity) [L]
Cooling age [Gyr] 0.1462
log(H/He) -5.069
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] 1.10 (0.7) 1.07 (1) 1.10 (0.7)
Distance [pc] 908.80 (618) 933.15 (986) 908.76 (618)
Composition He
Proper motion (right ascension) [mas/yr] 15.10382027 (0.7) 17.25315899 (2) 15.104 (0.7) 17.6
Proper motion (declination) [mas/yr] 5.494353513 (0.6) 4.075588576 (1) 5.494 (0.6) 1.2
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.13 (0.05) 20.13 (0.04) 20.15 (0.05) 20.14 20.14 (0.05)
g magnitude 20.25 (0.02) 20.25 (0.02) 20.22 (0.05) 20.22 20.22 (0.05)
r magnitude 20.52 (0.04) 20.53 (0.04) 20.57 (0.05) 20.57 20.56 (0.05)
i magnitude 20.70 (0.07) 20.70 (0.07) 20.75 (0.07) 20.75 20.74 (0.07)
z magnitude 20.67 (0.3) 20.62 (0.3) 20.66 (0.3) 20.66 20.63 (0.3)
G magnitude 20.36 (0.1) 20.42 20.36 (0.007)
BP magnitude 20.30 (0.1) 20.22
RP magnitude 20.40 (0.1) 20.26
Pan g magnitude 20.22 (0.03)
Pan r magnitude 20.47 (0.02)
Pan i magnitude 20.75 (0.03)
Pan z magnitude 21.00 (0.03)
Pan y magnitude
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.