SDSS J125634.22+181348.9

All names: SDSS J125634.22+181348.8, Gaia DR2 3940884492697308672, SDSS J125634.22+181348.9, Gaia DR3 3940884492697308672, SDSS J125634.22+181348.90, GALEX J125634.2+181348, Gaia EDR3 3940884492697308672

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 56 34.21 (0.5) 12 56 34.22 12 56 34.21 (0.7) 12 56 34.23 (0.5) 12 56 34.22
Declination 18 13 48.79 (0.3) 18 13 48.83 18 13 48.79 (0.4) 18 13 48.92 (0.3) 18 13 48.86
Spectral type DB DB DB DC:
Effective temperature [K] 12785.0 12165.0 10957.0 12463.0 (570)
log(g) [cgs] 8.20 8.15 8.01 8.35 (0.4)
Mass [M] 0.706 0.674 0.59 0.798 (0.2)
log(Luminosity) [L]
Cooling age [Gyr] 0.4995
log(H/He) -5.79
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] 2.98 (0.6) 2.45 (0.7) 2.98 (0.6)
Distance [pc] 336.03 (70) 407.59 (123) 336.03 (70)
Composition He
Proper motion (right ascension) [mas/yr] -22.41071538 (0.9) -25.66796251 (2) -22.411 (0.9)
Proper motion (declination) [mas/yr] -8.379607534 (0.7) -8.370403964 (1) -8.38 (0.7)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.09 (0.05) 20.08 (0.05) 20.08 (0.05)
g magnitude 20.01 (0.02) 20.02 (0.02) 20.03 (0.02)
r magnitude 20.21 (0.03) 20.21 (0.03) 20.23 (0.03)
i magnitude 20.40 (0.04) 20.31 (0.04) 20.31 (0.04)
z magnitude 20.36 (0.2) 20.35 (0.1) 20.93 (0.3)
G magnitude 20.09 (0.05) 20.14 20.09 (0.005)
BP magnitude 20.05 (0.05) 20.09
RP magnitude 19.88 (0.07) 20.00
Pan g magnitude 20.07 (0.02)
Pan r magnitude 20.18 (0.04)
Pan i magnitude 20.37 (0.02)
Pan z magnitude 20.59 (0.05)
Pan y magnitude 19.97 (0.2)
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.