SDSS J082041.50+062024.8

All names: Gaia EDR3 3096814910980164864, SDSS J082041.50+062024.90, SDSS J082041.50+062024.9, GALEX J082041.5+062025, Gaia DR2 3096814910980164864, WD 0818+064, Gaia DR3 3096814910980164864, SDSS J082041.50+062024.8

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 20 41.51 (0.5) 08 20 41.50 08 20 41.51 (0.6) 08 20 41.50 (0.5) 08 20 41.50 08 20 40.92 08 20 41.50
Declination 06 20 24.52 (0.4) 06 20 24.86 06 20 24.53 (0.5) 06 20 24.95 (0.4) 06 20 24.85 06 20 21.48 06 20 24.85
Spectral type DB DB DB DB DB DB
Effective temperature [K] 14652.0 14971.0 13875.0 15701.0 (538) 14797.0 (534)
log(g) [cgs] 8.38 8.20 8.12 8.38 (0.3) 8.38 (0.4)
Mass [M] 0.832 0.709 0.659 0.82 (0.2)
log(Luminosity) [L]
Cooling age [Gyr] 0.3079
log(H/He) <-6.02
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] 1.60 (0.5) 1.96 (0.7) 1.60 (0.5)
Distance [pc] 624.02 (211) 509.61 (192) 624.02 (211)
Composition He
Proper motion (right ascension) [mas/yr] 5.963882758 (0.6) 6.357529585 (1) 5.964 (0.6) 12.2
Proper motion (declination) [mas/yr] -26.64072703 (0.5) -27.35859929 (1) -26.641 (0.5) -25.7
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.99 (0.04) 19.99 (0.04) 19.96 (0.04) 19.95 19.95 (0.04)
g magnitude 20.03 (0.02) 20.03 (0.02) 20.03 (0.02) 20.03 20.04 (0.02)
r magnitude 20.28 (0.02) 20.28 (0.02) 20.29 (0.02) 20.29 20.29 (0.02)
i magnitude 20.51 (0.03) 20.51 (0.04) 20.51 (0.04) 20.51 20.52 (0.04)
z magnitude 20.98 (0.2) 20.98 (0.2) 20.95 (0.2) 20.95 20.97 (0.2)
G magnitude 20.17 (0.06) 20.21 20.17 (0.006)
BP magnitude 20.15 (0.06) 20.02
RP magnitude 20.25 (0.1) 20.00
Pan g magnitude 20.08 (0.01)
Pan r magnitude 20.27 (0.03)
Pan i magnitude 20.63 (0.05)
Pan z magnitude 20.75 (0.2)
Pan y magnitude 20.61 (0.2)
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.