USNO-A2.0 1275-08138204

All names: SDSS J124633.08+430747.7, Gaia EDR3 1528399812050247168, USNO-A2.0 1275-08138204, WD 1244+434, SDSS J124633.09+430747.8, GALEX J124633.1+430747, SDSS J124633.09+430747.7, Gaia DR2 1528399812050247168, Gaia DR3 1528399812050247168

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Tremblay et al. 2011 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 46 33.07 (0.1) 12 46 33.09 12 46 33.07 (0.2) 12 46 33.07 12 46 33.10 (0.1) 12 46 33.09 12 46 32.40 12 46 33.09
Declination 43 07 47.68 (0.1) 43 07 47.76 43 07 47.69 (0.1) 43 07 47.68 43 07 47.82 (0.1) 43 07 47.78 43 07 43.68 43 07 47.78
Spectral type DA DA DA DA DA DA DA DA
Effective temperature [K] 9246.0 10020.0 (120) 10153.0 (265) 10186.0 (78) 10096.0 (89)
log(g) [cgs] 7.79 8.97 (0.1) 7.97 (0.07) 8.90 (0.09) 8.88 (0.09)
Mass [M] 0.483 1.18 (0.05) 0.585 (0.05) 1.109 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.5722 2.5119
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 4.32 (0.2) 4.40 (0.2) 4.32 4.32 (0.2)
Distance [pc] 231.36 (11) 227.33 (12) 231.36 231.36 (11)
Composition H H
Proper motion (right ascension) [mas/yr] -20.4036477 (0.2) -19.81222531 (0.3) -20.404 (0.2) 0.2
Proper motion (declination) [mas/yr] -8.419297594 (0.2) -8.187272853 (0.3) -8.419 (0.2) -8.7
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.30 (0.3)
V magnitude
R magnitude 18.30 (0.3)
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.26 (0.02) 19.26 (0.02) 19.27 (0.03) 18.91 19.26 (0.03)
g magnitude 18.93 (0.009) 18.93 (0.009) 18.91 (0.02) 18.91 18.90 (0.02)
r magnitude 18.98 (0.01) 18.98 (0.01) 19.00 (0.02) 19.00 (0.02)
i magnitude 19.09 (0.02) 19.09 (0.02) 19.15 (0.02) 19.14 (0.02)
z magnitude 19.34 (0.05) 19.34 (0.06) 19.38 (0.05) 19.35 (0.05)
G magnitude 18.93 (0.01) 18.96 18.93 18.93 (0.003)
BP magnitude 19.00 (0.01) 18.96
RP magnitude 18.84 (0.03) 18.77
Pan g magnitude 18.95 (0.007)
Pan r magnitude 19.00 (0.01)
Pan i magnitude 19.12 (0.005)
Pan z magnitude 19.25 (0.02)
Pan y magnitude 19.31 (0.03)
E(B-V) 0.015

* 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.