SDSS J074204.79+434835.7

All names: Gaia DR2 925185708460455936, Gaia EDR3 925185708460455936, SDSS J074204.78+434835.7, SDSS J074204.75+434835.5, J0742+4348, WD 0738+439, GALEX J074204.7+434836, SDSS J074204.79+434835.7, Gaia DR3 925185708460455936

Parameter Unit Gaia EDR3 SDSS DR12 Coutu et al. 2019 Gaia DR2 Stilism Koester et al. 2006 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 07 42 04.72 (0.1) 07 42 04.78 07 42 04.78 07 42 04.72 (0.2) 07 42 04.72 07 42 04.80 (0.1) 07 42 04.90 07 42 04.79
Declination 43 48 35.44 (0.1) 43 48 35.77 43 48 35.77 43 48 35.45 (0.1) 43 48 35.44 43 48 35.86 (0.1) 43 48 31.32 43 48 35.73
Spectral type DQ DQ DQ DQ DQ6.5 DQ DQ
Effective temperature [K] 8042.0 (208) 7738.0 8667.0 (138) 10098.0 (32)
log(g) [cgs] 7.95 8.00 (0) 8.11 (0.04) 9.52 (0.4)
Mass [M] 0.5456 0.645 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 1.0300
log(H/He)
log(C/He) -5.3273 (0.1) -5.47 (0.04)
log(Ca/He)
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] 7.40 (0.2) 7.16 7.16 (0.2) 7.40 7.40 (0.2)
Distance [pc] 135.22 (3) 139.59 (4) 139.59 (4) 135.22 135.22 (3)
Composition He He
Proper motion (right ascension) [mas/yr] -52.53975317 (0.2) -52.1473048 (0.4) -52.54 (0.2)
Proper motion (declination) [mas/yr] -26.44553507 (0.1) -26.49950192 (0.3) -26.446 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.01 (0.02) 19.01 (0.02) 19.02 (0.03)
g magnitude 18.84 (0.009) 18.84 (0.009) 18.81 (0.02)
r magnitude 18.73 (0.01) 18.73 (0.01) 18.73 (0.02)
i magnitude 18.85 (0.01) 18.84 (0.01) 18.82 (0.02)
z magnitude 19.02 (0.05) 19.02 (0.05) 19.01 (0.05)
G magnitude 18.71 (0.03) 18.75 18.71 18.71 (0.003)
BP magnitude 18.75 (0.03) 18.70
RP magnitude 18.45 (0.03) 18.36
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.005

* 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.