SDSS J121456.75+204058.6

All names: Gaia EDR3 3951540233543307008, Gaia DR2 3951540233543307008, SDSS J121456.76+204058.6, GALEX J121456.8+204059, Gaia DR3 3951540233543307008, SDSS J121456.76+204058.7, SDSS J121456.75+204058.6

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 14 56.75 (0.09) 12 14 56.75 12 14 56.75 (0.1) 12 14 56.75 12 14 56.76 (0.09) 12 14 56.76
Declination 20 40 58.82 (0.08) 20 40 58.61 20 40 58.81 (0.1) 20 40 58.82 20 40 58.58 (0.08) 20 40 58.68
Spectral type DA DA DA DA DA
Effective temperature [K] 12241.0 11821.0 (350) 12089.0 (139)
log(g) [cgs] 8.07 7.98 (0.04) 8.23 (0.04)
Mass [M] 0.649 0.593 (0.03) 0.738 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.3911
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 6.12 (0.1) 6.30 (0.2) 6.12 6.12 (0.1)
Distance [pc] 163.39 (3) 158.70 (6) 163.39 163.39 (3)
Composition H
Proper motion (right ascension) [mas/yr] -8.783965459 (0.1) -8.557172971 (0.3) -8.784 (0.1)
Proper motion (declination) [mas/yr] 15.22289692 (0.09) 14.75445622 (0.3) 15.223 (0.09)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.07 (0.01) 18.07 (0.01) 18.12 (0.03)
g magnitude 17.67 (0.006) 17.67 (0.006) 17.71 (0.03)
r magnitude 17.88 (0.006) 17.88 (0.006) 17.87 (0.01)
i magnitude 18.09 (0.008) 18.09 (0.008) 18.09 (0.01)
z magnitude 18.32 (0.02) 18.32 (0.02) 18.31 (0.03)
G magnitude 17.76 (0.007) 17.79 17.76 17.76 (0.003)
BP magnitude 17.79 (0.007) 17.78
RP magnitude 17.78 (0.01) 17.80
Pan g magnitude 17.68 (0.008)
Pan r magnitude 17.88 (0.005)
Pan i magnitude 18.10 (0.005)
Pan z magnitude 18.30 (0.01)
Pan y magnitude 18.47 (0.02)
E(B-V) 0.008

* 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.