SDSS J080949.93+310642.0

All names: J0809+3106, SDSS J080949.93+310642.0, SDSS J080949.93+310642.1, SDSS J080949.94+310642.00, WD 0806+312, SDSS J080949.94+310642.0, Gaia DR3 877057614905717760, GALEX J080949.9+310642, Gaia EDR3 877057614905717760, Gaia DR2 877057614905717760

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Coutu et al. 2019 Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 09 49.87 (0.2) 08 09 49.93 08 09 49.94 08 09 49.87 (0.2) 08 09 49.87 08 09 49.94 (0.2) 08 09 49.93 08 09 50.02 08 09 49.94
Declination 31 06 41.76 (0.1) 31 06 42.10 31 06 42.13 31 06 41.77 (0.1) 31 06 41.76 31 06 42.12 (0.1) 31 06 42.04 31 06 37.80 31 06 42.03
Spectral type DBZA DB DBZA DBZA DBZA DBZA DB
Effective temperature [K] 16592.0 11764.0 11657.0 (434) 11782.0 (135) 11953.0 (662) 13239.0 (212) 12821.0 (294)
log(g) [cgs] 9.27 7.85 7.85 8.00 (0) 7.97 (0.08) 8.90 (0.1) 8.78 (0.2)
Mass [M] 1.286 0.5 0.4981 0.565 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 0.3370
log(H/He) -4.696 -5.4399 (0.3) -5.31 (0.3)
log(C/He)
log(Ca/He) -9.5537 (0.2) -9.69 (0.3)
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] 4.46 (0.2) 4.35 4.35 (0.2) 4.46 4.46 (0.2)
Distance [pc] 224.34 (9) 229.96 (12) 229.96 (12) 208.00 224.34 224.34 (9)
Composition He
Proper motion (right ascension) [mas/yr] -62.12428017 (0.2) -62.42748399 (0.4) -62.124 (0.2)
Proper motion (declination) [mas/yr] -22.31912186 (0.1) -22.81884657 (0.3) -22.319 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.49 (0.02) 18.49 (0.02) 18.50 (0.02) 18.50 18.48 (0.02)
g magnitude 18.41 (0.007) 18.41 (0.007) 18.44 (0.02) 18.44 18.42 (0.02)
r magnitude 18.60 (0.009) 18.60 (0.009) 18.59 (0.02) 18.59 18.60 (0.02)
i magnitude 18.79 (0.01) 18.79 (0.01) 18.80 (0.03) 18.79 18.80 (0.03)
z magnitude 19.07 (0.04) 19.07 (0.04) 19.05 (0.04) 19.04 19.03 (0.04)
G magnitude 18.49 (0.04) 18.53 18.49 18.49 (0.003)
BP magnitude 18.47 (0.04) 18.47
RP magnitude 18.49 (0.04) 18.48
Pan g magnitude 18.46 (0.005)
Pan r magnitude 18.59 (0.006)
Pan i magnitude 18.81 (0.01)
Pan z magnitude 18.98 (0.01)
Pan y magnitude 19.14 (0.04)
E(B-V) 0.014

* 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.