WD 0950+021

All names: Gaia DR2 3846782515155602944, WD 0950+021, SDSS J095256.69+015407.7, SDSS J095256.69+015407.70, Gaia EDR3 3846782515155602944, SDSS J095256.69+015407.5, SDSS J095256.68+015407.6, SDSS J095256.68+015407.7, USNO-B1.0 0919-00212186, Gaia DR3 3846782515155602944

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Nitta et al. 2009 Eisenstein et al. 2006 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 09 52 56.69 (0.1) 09 52 56.68 09 52 56.69 (0.2) 09 52 56.68 09 52 56.69 09 52 56.68 (0.1) 09 52 55.99 09 52 56.69
Declination 01 54 07.58 (0.1) 01 54 07.68 01 54 07.58 (0.2) 01 54 07.70 01 54 07.58 01 54 07.73 (0.1) 01 54 02.88 01 54 07.72
Spectral type DB DB DB DB DB DB1.5 DB DB
Effective temperature [K] 33326.0 (320) 33904.0 28645.0 21189.0 33206.0 (263) 32920.0 (323) 33800.0 (200) 27851.0 (1732) 32287.0 (352)
log(g) [cgs] 8.13 (0.03) 8.05 8.06 7.91 8.06 (0.04) 8.16 (0.04) 8.16 (0.03) 7.98 (0.06) 8.19 (0.04)
Mass [M] 0.7 (0.02) 0.648 0.646 0.55 0.6 (0.05) 0.725 (0.02)
log(Luminosity) [L] -0.81 (0.03)
Cooling age [Gyr] 0.0072 (0.0003) 0.0432
log(H/He) <-3.664 <-2.91
log(C/He)
log(Ca/He) <-4.0
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] 3.37 (0.1) 3.56 (0.2) 3.37 3.37 (0.1)
Distance [pc] 296.78 (12) 280.76 (17) 314.00 296.78 296.78 (12)
Composition He He
Proper motion (right ascension) [mas/yr] 1.178370065 (0.1) 1.296902601 (0.3) 1.178 (0.1)
Proper motion (declination) [mas/yr] -9.456801433 (0.1) -9.887223362 (0.4) -9.457 (0.1)
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 18.21 (0.04)
H magnitude 18.40 (0.2)
K magnitude
u magnitude 17.31 (0.008) 17.29 (0.02) 17.31 (0.008) 17.30 17.32 (0.02)
g magnitude 17.48 (0.005) 17.50 17.50 (0.01) 17.48 (0.005) 17.50 17.51 (0.01)
r magnitude 17.85 (0.006) 17.85 (0.02) 17.85 (0.006) 17.84 17.86 (0.02)
i magnitude 18.17 (0.009) 18.16 (0.01) 18.17 (0.009) 18.15 18.17 (0.01)
z magnitude 18.48 (0.04) 18.45 (0.03) 18.48 (0.04) 18.45 18.46 (0.04)
G magnitude 17.67 (0.008) 17.71 17.67 17.67 (0.003)
BP magnitude 17.59 (0.008) 17.53
RP magnitude 17.88 (0.02) 17.87
Pan g magnitude 17.53 (0.004)
Pan r magnitude 17.87 (0.005)
Pan i magnitude 18.19 (0.006)
Pan z magnitude 18.45 (0.009)
Pan y magnitude 18.59 (0.03)
E(B-V) 0.023

* 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.