SDSS J122555.16+225057.2

All names: SDSS J122555.18+225056.9, SDSS J122555.17+225057.3, GALEX J122555.1+225057, Gaia EDR3 3953741249663827712, Gaia DR3 3953741249663827712, SDSS J122555.17+225057.2, Gaia DR2 3953741249663827712, SDSS J122555.16+225057.2, SDSS J122555.17+225057.30

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 12 25 55.19 (0.2) 12 25 55.17 12 25 55.19 (0.2) 12 25 55.16 (0.2) 12 25 55.17
Declination 22 50 56.82 (0.2) 22 50 57.29 22 50 56.84 (0.2) 22 50 57.57 (0.2) 22 50 57.31
Spectral type DB DB DBAH: DB
Effective temperature [K] 17848.0 19108.0 15780.0 18366.0 (222) 18103.0 (234)
log(g) [cgs] 8.11 8.05 7.80 8.15 (0.07) 8.11 (0.08)
Mass [M] 0.661 0.626 0.486
log(Luminosity) [L]
Cooling age [Gyr] 0.1228
log(H/He) -5.283 <-4.42
log(C/He)
log(Ca/He) <-5.04
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] 2.51 (0.2) 2.69 (0.3) 2.51 (0.2)
Distance [pc] 398.38 (38) 371.14 (39) 330.00 398.37 (38)
Composition He
Proper motion (right ascension) [mas/yr] 24.71772176 (0.2) 25.15366652 (0.4) 24.718 (0.2)
Proper motion (declination) [mas/yr] -47.02292521 (0.2) -47.4882563 (0.3) -47.023 (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 18.46 (0.02) 18.46 (0.02) 18.47 (0.02)
g magnitude 18.56 (0.007) 18.56 (0.007) 18.57 (0.03)
r magnitude 18.88 (0.01) 18.88 (0.01) 18.89 (0.02)
i magnitude 19.16 (0.01) 19.16 (0.01) 19.17 (0.02)
z magnitude 19.35 (0.06) 19.35 (0.06) 19.37 (0.07)
G magnitude 18.72 (0.02) 18.76 18.72 (0.004)
BP magnitude 18.65 (0.02) 18.60
RP magnitude 18.83 (0.05) 18.80
Pan g magnitude 18.60 (0.01)
Pan r magnitude 18.88 (0.007)
Pan i magnitude 19.16 (0.01)
Pan z magnitude 19.37 (0.01)
Pan y magnitude 19.51 (0.04)
E(B-V) 0.017

* 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.