SDSS J012118.42+384606.9

All names: Gaia DR3 323521675747536384, SDSS J012118.42+384606.9, SDSS J012118.42+384606.8, Gaia DR2 323521675747536384, GALEX J012118.4+384606, Gaia EDR3 323521675747536384, SDSS J012118.42+384606.90

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 01 21 18.45 (0.4) 01 21 18.43 01 21 18.45 (0.6) 01 21 18.41 (0.4) 01 21 18.42
Declination 38 46 06.88 (0.3) 38 46 06.87 38 46 06.88 (0.4) 38 46 06.89 (0.3) 38 46 06.94
Spectral type DBH: DBH DBH: DB
Effective temperature [K] 17776.0 16437.0 15817.0 17664.0 (160) 18084.0 (266)
log(g) [cgs] 8.14 8.25 8.23 7.91 (0.08) 8.07 (0.09)
Mass [M] 0.677 0.748 0.735
log(Luminosity) [L]
Cooling age [Gyr] 0.2564
log(H/He) <-5.736 <-4.6
log(C/He)
log(Ca/He) <-5.58
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] 2.14 (0.4) 2.62 (0.6) 2.14 (0.4)
Distance [pc] 467.91 (81) 381.57 (85) 498.00 467.92 (81)
Composition He
Proper motion (right ascension) [mas/yr] 31.24169147 (0.4) 31.47027967 (1) 31.242 (0.4)
Proper motion (declination) [mas/yr] -0.17929542 (0.3) -0.780285481 (1) -0.179 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.20 (0.02) 19.20 (0.02) 19.16 (0.03)
g magnitude 19.29 (0.01) 19.29 (0.01) 19.26 (0.02)
r magnitude 19.58 (0.01) 19.58 (0.01) 19.59 (0.02)
i magnitude 19.82 (0.02) 19.82 (0.02) 19.79 (0.03)
z magnitude 20.08 (0.1) 20.08 (0.1) 20.11 (0.09)
G magnitude 19.42 (0.05) 19.47 19.42 (0.004)
BP magnitude 19.35 (0.05) 19.36
RP magnitude 19.48 (0.06) 19.56
Pan g magnitude 19.29 (0.008)
Pan r magnitude 19.57 (0.008)
Pan i magnitude 19.86 (0.01)
Pan z magnitude 20.06 (0.03)
Pan y magnitude 20.11 (0.07)
E(B-V) 0.038

* 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.