SDSS J122444.73+174145.8

All names: Gaia DR2 3946894526333917568, Gaia DR3 3946894526333917568, SDSS J122444.73+174145.8, GALEX J122444.7+174146, SDSS J122444.73+174145.85, SDSS J122444.72+174145.8, Gaia EDR3 3946894526333917568

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 12 24 44.72 (0.2) 12 24 44.73 12 24 44.72 (0.3) 12 24 44.73 (0.2)
Declination 17 41 45.88 (0.2) 17 41 45.82 17 41 45.87 (0.2) 17 41 45.78 (0.2)
Spectral type DBA DBA DB DB
Effective temperature [K] 14527.0 15967.0 13489.0 14476.0 (72) 14800.0 (110)
log(g) [cgs] 8.04 7.62 7.37 8.00 (0) 8.17 (0.08)
Mass [M] 0.61 0.4 0.304 0.731 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.1401
log(H/He) -5.613 -5.49 (0.6)
log(C/He)
log(Ca/He) <-7.99
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] 2.69 (0.3) 2.22 (0.4) 2.69 (0.3)
Distance [pc] 371.61 (37) 449.89 (74) 308.00 371.61 (37)
Composition He
Proper motion (right ascension) [mas/yr] -10.30209514 (0.2) -10.1435141 (0.5) -10.302 (0.2)
Proper motion (declination) [mas/yr] 5.800834958 (0.2) 6.387393937 (0.3) 5.801 (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 18.74 (0.02) 18.67 (0.03) 18.74 (0.02)
g magnitude 18.78 (0.009) 18.81 (0.02) 18.78 (0.009)
r magnitude 19.03 (0.01) 19.06 (0.02) 19.03 (0.01)
i magnitude 19.27 (0.02) 19.28 (0.02) 19.27 (0.02)
z magnitude 19.52 (0.08) 19.57 (0.07) 19.52 (0.08)
G magnitude 18.90 (0.03) 18.94 18.90 (0.004)
BP magnitude 18.86 (0.03) 18.74
RP magnitude 19.08 (0.04) 18.91
Pan g magnitude 18.82 (0.01)
Pan r magnitude 19.04 (0.007)
Pan i magnitude 19.28 (0.01)
Pan z magnitude 19.50 (0.02)
Pan y magnitude 19.60 (0.08)
E(B-V) 0.021

* 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.