SDSS J155026.70+201951.8

All names: Gaia DR3 1204122565656852864, SDSS J155026.69+201951.7, SDSS J155026.71+201951.6, SDSS J155026.70+201951.8, GALEX J155026.6+201951, SDSS J155026.70+201951.80, Gaia DR2 1204122565656852864, Gaia EDR3 1204122565656852864

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 50 26.71 (0.1) 15 50 26.70 15 50 26.71 (0.2) 15 50 26.71 15 50 26.69 (0.1) 15 50 26.70
Declination 20 19 51.36 (0.2) 20 19 51.74 20 19 51.38 (0.2) 20 19 51.36 20 19 52.00 (0.2) 20 19 51.83
Spectral type DBAH: DB DBAH DBAH: DB
Effective temperature [K] 12653.0 11039.0 12552.0 (139) 11428.0 (440) 13288.0 (294)
log(g) [cgs] 7.98 7.99 8.00 (0) 8.07 (0.08) 8.47 (0.2)
Mass [M] 0.574 0.575 0.624 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 0.4710
log(H/He) -5.7 <-5.54
log(C/He)
log(Ca/He) <-9.29
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] 4.05 (0.2) 3.92 (0.3) 4.05 4.05 (0.2)
Distance [pc] 247.15 (14) 255.32 (20) 282.00 247.15 247.15 (14)
Composition He
Proper motion (right ascension) [mas/yr] 16.30332331 (0.2) 16.36820789 (0.4) 16.303 (0.2)
Proper motion (declination) [mas/yr] -40.26326131 (0.2) -40.27207252 (0.4) -40.263 (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 19.09 (0.02) 19.09 (0.02) 19.05 (0.03)
g magnitude 18.97 (0.009) 18.98 (0.009) 18.99 (0.02)
r magnitude 19.31 (0.01) 19.31 (0.01) 19.16 (0.02)
i magnitude 24.36 (0.7) 24.36 (0.7) 19.36 (0.02)
z magnitude 19.57 (0.07) 19.57 (0.07) 19.60 (0.07)
G magnitude 19.03 (0.02) 19.08 19.03 19.03 (0.003)
BP magnitude 19.07 (0.02) 19.01
RP magnitude 18.97 (0.03) 18.96
Pan g magnitude 18.99 (0.02)
Pan r magnitude 19.13 (0.006)
Pan i magnitude 19.31 (0.007)
Pan z magnitude 19.48 (0.02)
Pan y magnitude 19.58 (0.04)
E(B-V) 0.049

* 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.