SDSS J084214.91+343850.6

All names: Gaia DR3 717223529426672896, GALEX J084214.8+343850, Gaia DR2 717223529426672896, SDSS J084214.91+343850.6, Gaia EDR3 717223529426672896, SDSS J084214.91+343850.60, WD 0839+348

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 42 14.90 (0.6) 08 42 14.91 08 42 14.90 (1) 08 42 14.91 (0.6) 08 42 14.91 08 42 15.14 08 42 14.91
Declination 34 38 50.48 (0.4) 34 38 50.67 34 38 50.49 (0.7) 34 38 50.78 (0.4) 34 38 50.64 34 38 49.56 34 38 50.61
Spectral type DB DB DB DB DBA: DB
Effective temperature [K] 14871.0 13298.0 11469.0 15063.0 (621) 14672.0 (581)
log(g) [cgs] 7.78 8.94 8.80 7.79 (0.4) 7.70 (0.4)
Mass [M] 0.473 1.159 1.087
log(Luminosity) [L]
Cooling age [Gyr] 1.6420
log(H/He) -4.762
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] 3.88 (0.7) 3.59 (0.9) 3.88 (0.7)
Distance [pc] 257.96 (49) 278.54 (73) 257.96 (49)
Composition He
Proper motion (right ascension) [mas/yr] -8.933974449 (1) -9.931111557 (2) -8.934 (1)
Proper motion (declination) [mas/yr] -18.63410432 (1) -16.73951558 (1) -18.634 (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 20.30 (0.04) 20.27 (0.04) 20.26 (0.04) 20.25 20.29 (0.04)
g magnitude 20.36 (0.02) 20.34 (0.02) 20.36 (0.03) 20.35 20.38 (0.03)
r magnitude 20.58 (0.03) 20.57 (0.03) 20.56 (0.03) 20.55 20.56 (0.03)
i magnitude 20.74 (0.04) 20.73 (0.04) 20.76 (0.05) 20.75 20.76 (0.05)
z magnitude 21.13 (0.2) 21.20 (0.2) 21.21 (0.2) 21.20 21.22 (0.2)
G magnitude 20.47 (0.07) 20.53 20.47 (0.006)
BP magnitude 20.46 (0.07) 20.41
RP magnitude 20.22 (0.08) 20.37
Pan g magnitude 20.40 (0.01)
Pan r magnitude 20.58 (0.01)
Pan i magnitude 20.76 (0.03)
Pan z magnitude 20.92 (0.06)
Pan y magnitude 20.18 (0.2)
E(B-V) 0.015

* 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.