SDSS J122113.29+420625.5

All names: Gaia DR2 1537985835457168256, SDSS J122113.30+420625.6, Gaia EDR3 1537985835457168256, SDSS J122113.29+420625.5, Gaia DR3 1537985835457168256, GALEX J122113.2+420625, WD 1218+423

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 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 12 21 13.31 (0.4) 12 21 13.30 12 21 13.31 (0.8) 12 21 13.29 (0.4) 12 21 13.30 12 21 13.46 12 21 13.30
Declination 42 06 25.40 (0.5) 42 06 25.59 42 06 25.41 (0.7) 42 06 25.65 (0.5) 42 06 25.58 42 06 21.96 42 06 25.58
Spectral type DB: DB DB: DB: DA: DC:
Effective temperature [K] 12812.0 14090.0 (587) 13759.0 (612)
log(g) [cgs] 7.42 7.83 (0.5) 7.98 (0.6)
Mass [M] 0.318
log(Luminosity) [L]
Cooling age [Gyr] 0.1704
log(H/He)
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] 1.40 (0.7) 1.26 (0.9) 1.40 (0.7)
Distance [pc] 712.93 (371) 792.98 (597) 712.91 (371)
Composition He
Proper motion (right ascension) [mas/yr] 11.0899236 (0.8) 12.12092367 (1) 11.09 (0.8) 4.5
Proper motion (declination) [mas/yr] -15.67912704 (1) -15.40778792 (1) -15.679 (1) -15.6
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.28 (0.05) 20.27 (0.05) 20.27 (0.05) 20.26 20.27 (0.05)
g magnitude 20.27 (0.02) 20.27 (0.02) 20.29 (0.02) 20.28 20.29 (0.02)
r magnitude 20.57 (0.03) 20.57 (0.03) 20.55 (0.04) 20.55 20.56 (0.04)
i magnitude 20.75 (0.05) 20.75 (0.05) 20.71 (0.05) 20.71 20.71 (0.05)
z magnitude 20.96 (0.2) 20.96 (0.2) 20.99 (0.2) 20.98 20.96 (0.2)
G magnitude 20.39 (0.07) 20.45 20.39 (0.007)
BP magnitude 20.37 (0.07) 20.31
RP magnitude 20.41 (0.1) 20.09
Pan g magnitude 20.35 (0.03)
Pan r magnitude 20.57 (0.03)
Pan i magnitude 20.78 (0.02)
Pan z magnitude 20.99 (0.03)
Pan y magnitude
E(B-V) 0.017

* 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.