SDSS J084216.40+314746.2

All names: Gaia DR2 709905180031990784, LAMOST J084216.38+314746.2, SDSS J084216.38+314746.2, SDSS J084216.40+314746.2, SDSS J084216.39+314746.3, WD 0839+319, SDSS J084216.39+314746.2, GALEX J084216.4+314746, Gaia EDR3 709905180031990784, Gaia DR3 709905180031990784

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Guo et al. 2015 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 08 42 16.40 (0.2) 08 42 16.40 08 42 16.40 (0.2) 08 42 16.40 08 42 16.40 (0.2) 08 42 16.39 08 42 16.49 08 42 16.39
Declination 31 47 45.91 (0.1) 31 47 46.25 31 47 45.92 (0.1) 31 47 45.91 31 47 46.28 (0.1) 31 47 46.26 31 47 43.44 31 47 46.26
Spectral type DA DAZ DA DA DA DA_auto DA DA DA
Effective temperature [K] 22136.0 28110.0 (590) 27620.0 (1997) 27616.0 (363) 27753.0 (443)
log(g) [cgs] 8.16 7.84 (0.1) 8.38 (0.1) 7.79 (0.07) 7.79 (0.07)
Mass [M] 0.721 0.56 (0.05) 0.867 (0.09) 0.543 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.0664 0.0120
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] 2.55 (0.2) 2.60 (0.3) 2.55 2.55 (0.2)
Distance [pc] 392.32 (36) 384.73 (49) 392.32 392.31 (36)
Composition H H
Proper motion (right ascension) [mas/yr] -1.949834558 (0.2) -1.82221859 (0.4) -1.95 (0.2) -4.7
Proper motion (declination) [mas/yr] -23.44330473 (0.2) -23.59598493 (0.3) -23.443 (0.2) -21.8
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.38 (0.01) 18.38 (0.01) 18.38 (0.02) 18.37 18.39 (0.02)
g magnitude 18.54 (0.007) 18.53 (0.007) 18.54 (0.02) 18.53 18.53 (0.02)
r magnitude 18.97 (0.01) 18.97 (0.01) 19.01 (0.02) 19.00 19.00 (0.02)
i magnitude 19.26 (0.02) 19.26 (0.02) 19.29 (0.02) 19.28 19.28 (0.02)
z magnitude 19.49 (0.07) 19.49 (0.07) 19.50 (0.07) 19.49 19.49 (0.07)
G magnitude 18.78 (0.01) 18.82 18.78 18.78 (0.003)
BP magnitude 18.68 (0.01) 18.61
RP magnitude 19.08 (0.03) 19.00
Pan g magnitude 18.60 (0.008)
Pan r magnitude 18.97 (0.01)
Pan i magnitude 19.30 (0.01)
Pan z magnitude 19.62 (0.03)
Pan y magnitude 19.70 (0.03)
E(B-V) 0.022

* 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.