SDSS J083924.84+185402.3

All names: GALEX J083924.8+185402, Gaia EDR3 659688357984352896, SDSS J083924.84+185402.2, SDSS J083924.84+185402.30, Gaia DR2 659688357984352896, SDSS J083924.83+185402.2, SDSS J083924.84+185402.3, Gaia DR3 659688357984352896

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 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 39 24.83 (0.3) 08 39 24.83 08 39 24.83 (0.3) 08 39 24.84 (0.3) 08 39 24.84
Declination 18 54 02.08 (0.2) 18 54 02.26 18 54 02.09 (0.2) 18 54 02.34 (0.2) 18 54 02.25
Spectral type DB DB DB DB
Effective temperature [K] 15913.0 17011.0 14421.0 15839.0 (348)
log(g) [cgs] 8.28 7.62 7.38 8.31 (0.2)
Mass [M] 0.762 0.406 0.311 0.776 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.1135
log(H/He) <-5.855
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] 1.90 (0.3) 1.83 (0.5) 1.90 (0.3)
Distance [pc] 525.87 (86) 547.30 (139) 525.87 (86)
Composition He
Proper motion (right ascension) [mas/yr] -12.28223276 (0.3) -13.54323819 (0.7) -12.282 (0.3)
Proper motion (declination) [mas/yr] -16.1116785 (0.2) -15.35313378 (0.4) -16.112 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.95 (0.02) 18.95 (0.02) 18.95 (0.02)
g magnitude 19.04 (0.009) 19.05 (0.009) 19.09 (0.02)
r magnitude 19.31 (0.01) 19.31 (0.01) 19.32 (0.01)
i magnitude 19.58 (0.02) 19.58 (0.02) 19.62 (0.02)
z magnitude 19.80 (0.08) 19.80 (0.08) 19.84 (0.08)
G magnitude 19.18 (0.03) 19.23 19.18 (0.004)
BP magnitude 19.13 (0.03) 19.02
RP magnitude 19.24 (0.04) 19.14
Pan g magnitude 19.08 (0.01)
Pan r magnitude 19.33 (0.008)
Pan i magnitude 19.58 (0.01)
Pan z magnitude 19.79 (0.03)
Pan y magnitude 19.98 (0.06)
E(B-V) 0.029

* 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.