SDSS J151212.40+155742.3

All names: SDSS J151212.40+155742.31, SDSS J151212.39+155742.3, Gaia EDR3 1184315555172979584, GALEX J151212.4+155741, Gaia DR2 1184315555172979584, SDSS J151212.40+155742.3, Gaia DR3 1184315555172979584

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Simbad Vincent et al. 2023
Right ascension 15 12 12.40 (0.3) 15 12 12.39 15 12 12.40 (0.4) 15 12 12.39 (0.3)
Declination 15 57 42.33 (0.2) 15 57 42.35 15 57 42.33 (0.2) 15 57 42.34 (0.2)
Spectral type DB DB DB DB
Effective temperature [K] 12735.0 11979.0 10746.0 11904.0 (149) 11789.0 (140)
log(g) [cgs] 8.15 8.17 8.00 8.00 (0) 8.00 (0)
Mass [M] 0.679 0.687 0.581
log(Luminosity) [L]
Cooling age [Gyr] 0.5145
log(H/He) <-6.245 <-5.52
log(C/He)
log(Ca/He) <-9.75
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] 3.69 (0.3) 3.57 (0.3) 3.69 (0.3)
Distance [pc] 270.88 (19) 279.81 (26) 307.00 270.88 (19)
Composition He
Proper motion (right ascension) [mas/yr] 1.77713653 (0.4) 1.71396772 (0.8) 1.777 (0.4)
Proper motion (declination) [mas/yr] -0.665845434 (0.3) -1.698774837 (0.6) -0.666 (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 19.34 (0.02) 19.34 (0.02) 19.34 (0.02)
g magnitude 19.24 (0.01) 19.24 (0.01) 19.24 (0.01)
r magnitude 19.41 (0.01) 19.41 (0.01) 19.41 (0.01)
i magnitude 19.63 (0.02) 19.63 (0.02) 19.63 (0.02)
z magnitude 19.91 (0.08) 19.91 (0.08) 19.91 (0.08)
G magnitude 19.30 (0.07) 19.34 19.30 (0.004)
BP magnitude 19.39 (0.07) 19.21
RP magnitude 19.41 (0.07) 19.24
Pan g magnitude 19.27 (0.01)
Pan r magnitude 19.42 (0.01)
Pan i magnitude 19.61 (0.009)
Pan z magnitude 19.74 (0.03)
Pan y magnitude 19.74 (0.05)
E(B-V) 0.034

* 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.