SDSS J085202.44+213036.5

All names: SDSS J085202.44+213036.4, Gaia DR3 685956889066350976, SDSS J085202.44+213036.5, SDSS J085202.44+213036.50, GALEX J085202.4+213036, WD 0849+216, Gaia DR2 685956889066350976, Gaia EDR3 685956889066350976

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Nitta et al. 2009 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 52 02.43 (0.1) 08 52 02.44 08 52 02.43 (0.2) 08 52 02.43 08 52 02.45 (0.1) 08 52 02.21 08 52 02.44
Declination 21 30 36.40 (0.08) 21 30 36.47 21 30 36.40 (0.1) 21 30 36.40 21 30 36.54 (0.08) 21 30 29.16 21 30 36.50
Spectral type DB DB DB DBV2.0 DB DB
Effective temperature [K] 26496.0 21656.0 20845.0 24946.0 (507) 25846.0 (6361) 20789.0 (1832) 24803.0 (464)
log(g) [cgs] 7.96 8.01 8.01 7.83 (0.04) 8.02 (0.06) 7.93 (0.09) 7.96 (0.05)
Mass [M] 0.586 0.607 0.603 0.562 (0.07) 0.582 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.0578
log(H/He) -4.323 <-3.11
log(C/He)
log(Ca/He) <-4.0
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] 2.73 (0.2) 2.79 (0.2) 2.73 2.73 (0.2)
Distance [pc] 366.80 (24) 358.65 (27) 423.00 366.80 366.80 (24)
Composition He
Proper motion (right ascension) [mas/yr] -20.1542467 (0.2) -19.97290197 (0.4) -20.154 (0.2)
Proper motion (declination) [mas/yr] -8.559861944 (0.2) -8.573579164 (0.3) -8.56 (0.2)
Variability VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.10 (0.01) 18.10 (0.01) 18.50 18.10 (0.03)
g magnitude 18.22 (0.006) 18.50 18.22 (0.006) 18.50 18.22 (0.02)
r magnitude 18.57 (0.009) 18.57 (0.009) 18.56 (0.02)
i magnitude 18.89 (0.01) 18.89 (0.01) 18.89 (0.02)
z magnitude 19.11 (0.05) 19.11 (0.05) 19.11 (0.05)
G magnitude 18.37 (0.02) 18.40 18.37 18.37 (0.003)
BP magnitude 18.25 (0.02) 18.24
RP magnitude 18.52 (0.04) 18.54
Pan g magnitude 18.23 (0.005)
Pan r magnitude 18.56 (0.004)
Pan i magnitude 18.86 (0.006)
Pan z magnitude 19.14 (0.02)
Pan y magnitude 19.28 (0.04)
E(B-V) 0.024

* 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.