SDSS J085717.07+380206.0

All names: SDSS J085717.08+380206.0, GALEX J085717.1+380206, SDSS J085717.07+380206.0, Gaia DR2 719591709971035648, SDSS J085717.10+380206.0, SDSS J085717.08+380206.00, Gaia DR3 719591709971035648, WD 0854+382, Gaia EDR3 719591709971035648

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism 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 57 17.13 (0.2) 08 57 17.08 08 57 17.13 (0.3) 08 57 17.13 08 57 17.08 (0.2) 08 57 17.08 08 57 16.51 08 57 17.08
Declination 38 02 06.04 (0.2) 38 02 06.09 38 02 06.04 (0.2) 38 02 06.04 38 02 06.08 (0.2) 38 02 06.01 38 02 00.96 38 02 06.03
Spectral type DB DB DB DB DB DB DB
Effective temperature [K] 13561.0 11170.0 11413.0 11725.0 (691) 12903.0 (383) 12834.0 (392)
log(g) [cgs] 9.00 8.12 8.20 8.23 (0.1) 8.64 (0.3) 8.90 (0.3)
Mass [M] 1.189 0.657 0.704 0.729 (0.1) 1.159 (0.08)
log(Luminosity) [L]
Cooling age [Gyr] 0.5932
log(H/He) <-6.218
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] 4.02 (0.3) 4.00 (0.4) 4.02 4.02 (0.3)
Distance [pc] 248.49 (20) 250.31 (26) 248.49 248.49 (20)
Composition He
Proper motion (right ascension) [mas/yr] 37.53060826 (0.3) 37.36975671 (0.6) 37.531 (0.3) 34.0
Proper motion (declination) [mas/yr] -2.101047675 (0.3) -2.823861849 (0.5) -2.101 (0.3) -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 19.26 (0.02) 19.26 (0.02) 19.13 (0.03) 19.13 19.14 (0.03)
g magnitude 19.11 (0.01) 19.11 (0.01) 19.15 (0.02) 19.14 19.14 (0.02)
r magnitude 19.24 (0.01) 19.24 (0.01) 19.30 (0.02) 19.29 19.29 (0.02)
i magnitude 19.44 (0.02) 19.44 (0.02) 19.45 (0.03) 19.44 19.44 (0.03)
z magnitude 19.60 (0.06) 19.60 (0.06) 19.71 (0.06) 19.70 19.69 (0.06)
G magnitude 19.19 (0.03) 19.23 19.19 19.19 (0.004)
BP magnitude 19.22 (0.03) 19.14
RP magnitude 19.17 (0.05) 19.21
Pan g magnitude 19.15 (0.009)
Pan r magnitude 19.31 (0.007)
Pan i magnitude 19.50 (0.008)
Pan z magnitude 19.68 (0.02)
Pan y magnitude 19.73 (0.07)
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.