SDSS J080421.52+165452.9

All names: Gaia DR2 656771010038276096, SDSS J080421.51+165452.9, SDSS J080421.52+165452.9, Gaia DR3 656771010038276096, GALEX J080421.5+165453, Gaia EDR3 656771010038276096, SDSS J080421.52+165452.90

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 04 21.51 (0.3) 08 04 21.52 08 04 21.51 (0.3) 08 04 21.52 (0.3) 08 04 21.52
Declination 16 54 52.85 (0.2) 16 54 52.93 16 54 52.85 (0.2) 16 54 52.97 (0.2) 16 54 52.94
Spectral type DBA DBA DBA DB
Effective temperature [K] 15763.0 14989.0 13789.0 16066.0 (266)
log(g) [cgs] 8.08 8.09 7.98 8.44 (0.2)
Mass [M] 0.639 0.646 0.576
log(Luminosity) [L]
Cooling age [Gyr] 0.2491
log(H/He) -4.283
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] 3.05 (0.3) 3.04 (0.4) 3.05 (0.3)
Distance [pc] 327.59 (37) 329.17 (40) 327.59 (37)
Composition He
Proper motion (right ascension) [mas/yr] -11.1928277 (0.3) -10.46785046 (0.6) -11.193 (0.3)
Proper motion (declination) [mas/yr] -7.542841206 (0.2) -8.236574767 (0.4) -7.543 (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 18.81 (0.02) 18.81 (0.02) 18.79 (0.02)
g magnitude 18.90 (0.009) 18.90 (0.009) 18.92 (0.02)
r magnitude 19.17 (0.01) 19.17 (0.01) 19.16 (0.02)
i magnitude 19.41 (0.02) 19.41 (0.02) 19.40 (0.02)
z magnitude 19.62 (0.08) 19.62 (0.08) 19.60 (0.07)
G magnitude 19.02 (0.03) 19.06 19.02 (0.004)
BP magnitude 18.96 (0.03) 18.92
RP magnitude 19.15 (0.06) 19.13
Pan g magnitude 18.93 (0.009)
Pan r magnitude 19.17 (0.006)
Pan i magnitude 19.43 (0.01)
Pan z magnitude 19.62 (0.02)
Pan y magnitude 19.64 (0.06)
E(B-V) 0.016

* 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.