SDSS J094547.54+482315.0

All names: USNO-A2.0 1350-07651981, Gaia EDR3 825147914316749056, Gaia DR3 825147914316749056, USNO-B1.0 1383-00224791, SDSS J094547.54+482315.0, Gaia DR2 825147914316749056, SDSS J094547.51+482314.5, SDSS J094547.51+482314.57

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 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 09 45 47.50 (0.2) 09 45 47.54 09 45 47.50 (0.2) 09 45 47.50 09 45 47.55 (0.2)
Declination 48 23 14.49 (0.1) 48 23 15.06 48 23 14.51 (0.2) 48 23 14.49 48 23 15.15 (0.1)
Spectral type DB DB DC DB DC
Effective temperature [K] 11865.0 11647.0 10553.0 10470.0 (249) 10652.0 (190) 10020.0 (437)
log(g) [cgs] 8.30 8.16 8.00 8.00 (0) 8.00 (0) 7.79 (0.09)
Mass [M] 0.775 0.682 0.582 0.464 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 0.5423
log(H/He) <-6.35 <-5.38
log(C/He)
log(Ca/He) <-10.57
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] 4.29 (0.2) 4.40 (0.3) 4.29 4.29 (0.2)
Distance [pc] 233.16 (11) 227.49 (17) 220.00 233.16 233.15 (11)
Composition He
Proper motion (right ascension) [mas/yr] -31.83102966 (0.2) -31.71508254 (0.4) -31.831 (0.2)
Proper motion (declination) [mas/yr] -41.19618199 (0.2) -41.3332917 (0.4) -41.196 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.60
V magnitude
R magnitude 19.10
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.91 (0.02) 18.91 (0.02) 18.91 (0.03)
g magnitude 18.83 (0.008) 18.83 (0.01) 18.82 (0.02)
r magnitude 18.99 (0.01) 18.99 (0.01) 19.02 (0.02)
i magnitude 19.18 (0.02) 19.18 (0.02) 19.20 (0.02)
z magnitude 19.39 (0.08) 19.39 (0.08) 19.40 (0.08)
G magnitude 18.90 (0.02) 18.94 18.90 18.90 (0.003)
BP magnitude 18.93 (0.02) 18.92
RP magnitude 18.82 (0.04) 18.90
Pan g magnitude 18.89 (0.01)
Pan r magnitude 19.01 (0.007)
Pan i magnitude 19.17 (0.01)
Pan z magnitude 19.35 (0.02)
Pan y magnitude 19.36 (0.05)
E(B-V) 0.013

* 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.