SDSS J091828.56+224022.6

All names: SDSS J091828.56+224022.60, Gaia DR3 638857143826920320, Gaia DR2 638857143826920320, SDSS J091828.56+224022.6, SDSS J091828.55+224022.5, GALEX J091828.5+224022, Gaia EDR3 638857143826920320

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 09 18 28.57 (0.3) 09 18 28.56 09 18 28.57 (0.4) 09 18 28.56 (0.3) 09 18 28.56
Declination 22 40 22.63 (0.2) 22 40 22.59 22 40 22.63 (0.3) 22 40 22.52 (0.2) 22 40 22.62
Spectral type DB DB DB DB
Effective temperature [K] 12572.0 12567.0 11097.0 11778.0 (134) 12782.0 (483)
log(g) [cgs] 8.35 7.84 7.70 8.00 (0) 8.94 (0.3)
Mass [M] 0.804 0.496 0.424
log(Luminosity) [L]
Cooling age [Gyr] 0.3252
log(H/He) -6.209 <-5.63
log(C/He)
log(Ca/He) <-10.01
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] 3.06 (0.4) 2.96 (0.5) 3.06 (0.4)
Distance [pc] 326.52 (39) 338.12 (56) 281.00 326.52 (39)
Composition He
Proper motion (right ascension) [mas/yr] 10.93511227 (0.3) 9.784922774 (0.6) 10.935 (0.3)
Proper motion (declination) [mas/yr] 6.825767209 (0.2) 7.219651985 (0.5) 6.826 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.23 (0.02) 19.23 (0.02) 19.22 (0.02)
g magnitude 19.16 (0.01) 19.16 (0.01) 19.17 (0.02)
r magnitude 19.33 (0.01) 19.33 (0.01) 19.35 (0.02)
i magnitude 19.53 (0.02) 19.53 (0.02) 19.54 (0.03)
z magnitude 19.68 (0.09) 19.68 (0.09) 19.68 (0.08)
G magnitude 19.23 (0.04) 19.26 19.23 (0.004)
BP magnitude 19.35 (0.04) 19.22
RP magnitude 19.34 (0.08) 19.34
Pan g magnitude 19.19 (0.009)
Pan r magnitude 19.34 (0.008)
Pan i magnitude 19.52 (0.01)
Pan z magnitude 19.67 (0.02)
Pan y magnitude 19.83 (0.2)
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.