SDSS J084424.51+105043.9

All names: Gaia EDR3 598794376084628224, Gaia DR2 598794376084628224, GALEX J084424.5+105044, SDSS J084424.51+105044.00, SDSS J084424.51+105044.0, Gaia DR3 598794376084628224, SDSS J084424.51+105043.9, SDSS J084424.50+105043.9

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 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 44 24.49 (0.2) 08 44 24.51 08 44 24.49 (0.2) 08 44 24.52 (0.2) 08 44 24.51
Declination 10 50 43.78 (0.09) 10 50 43.97 10 50 43.79 (0.1) 10 50 44.02 (0.09) 10 50 43.97
Spectral type DB DB DBAH: DB
Effective temperature [K] 17420.0 19278.0 16074.0 17666.0 (149) 17772.0 (194)
log(g) [cgs] 8.14 7.93 7.71 8.00 (0.07) 8.17 (0.07)
Mass [M] 0.676 0.558 0.443
log(Luminosity) [L]
Cooling age [Gyr] 0.1012
log(H/He) -4.927 <-4.69
log(C/He)
log(Ca/He) <-5.68
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] 2.81 (0.2) 2.68 (0.3) 2.81 (0.2)
Distance [pc] 356.26 (23) 373.50 (35) 328.00 356.25 (23)
Composition He
Proper motion (right ascension) [mas/yr] -28.55835364 (0.2) -28.29910706 (0.4) -28.558 (0.2)
Proper motion (declination) [mas/yr] -15.09209392 (0.2) -15.13988481 (0.3) -15.092 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.30 (0.01) 18.30 (0.01) 18.32 (0.03)
g magnitude 18.38 (0.007) 18.38 (0.007) 18.38 (0.02)
r magnitude 18.72 (0.009) 18.72 (0.009) 18.71 (0.02)
i magnitude 18.99 (0.01) 18.99 (0.01) 18.96 (0.02)
z magnitude 19.27 (0.04) 19.27 (0.04) 19.29 (0.05)
G magnitude 18.56 (0.02) 18.60 18.56 (0.003)
BP magnitude 18.48 (0.02) 18.42
RP magnitude 18.73 (0.06) 18.66
Pan g magnitude 18.43 (0.007)
Pan r magnitude 18.72 (0.002)
Pan i magnitude 19.02 (0.01)
Pan z magnitude 19.22 (0.03)
Pan y magnitude 19.24 (0.07)
E(B-V) 0.025

* 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.