SDSS J084712.49+200443.1

All names: GALEX J084712.4+200443, SDSS J084712.49+200443.0, Gaia DR2 661556939339551616, Gaia DR3 661556939339551616, SDSS J084712.49+200443.1, Gaia EDR3 661556939339551616, SDSS J084712.49+200442.9

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 47 12.50 (0.2) 08 47 12.49 08 47 12.50 (0.3) 08 47 12.50 08 47 12.49 (0.2) 08 47 12.49
Declination 20 04 42.81 (0.09) 20 04 42.97 20 04 42.82 (0.2) 20 04 42.81 20 04 43.13 (0.09) 20 04 43.05
Spectral type DA DA DA DA DA
Effective temperature [K] 8861.0 8738.0 (230) 9047.0 (50)
log(g) [cgs] 7.94 7.97 (0.06) 8.28 (0.07)
Mass [M] 0.562 0.579 (0.05) 0.764 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.7583
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] 6.81 (0.2) 6.51 (0.3) 6.81 6.81 (0.2)
Distance [pc] 146.85 (5) 153.69 (6) 146.85 146.85 (5)
Composition H
Proper motion (right ascension) [mas/yr] 12.96703785 (0.2) 11.97532482 (0.5) 12.967 (0.2)
Proper motion (declination) [mas/yr] -20.11132287 (0.2) -19.77601793 (0.4) -20.111 (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 18.92 (0.02) 18.91 (0.02) 18.88 (0.02)
g magnitude 18.46 (0.007) 18.46 (0.007) 18.47 (0.02)
r magnitude 18.50 (0.009) 18.50 (0.009) 18.50 (0.02)
i magnitude 18.56 (0.01) 18.56 (0.01) 18.57 (0.02)
z magnitude 18.68 (0.03) 18.68 (0.03) 18.71 (0.05)
G magnitude 18.42 (0.03) 18.45 18.42 18.42 (0.003)
BP magnitude 18.55 (0.03) 18.44
RP magnitude 18.24 (0.02) 18.24
Pan g magnitude 18.48 (0.01)
Pan r magnitude 18.50 (0.005)
Pan i magnitude 18.58 (0.007)
Pan z magnitude 18.71 (0.01)
Pan y magnitude 18.79 (0.03)
E(B-V) 0.006

* 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.