SDSS J203943.60+003109.1

All names: GALEX J203943.6+003109, Gaia DR3 4231176689373546112, Gaia EDR3 4231176689373546112, Gaia DR2 4231176689373546112, SDSS J203943.60+003109.1

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 20 39 43.60 (0.6) 20 39 43.60 20 39 43.60 (0.8) 20 39 43.60 (0.6) 20 39 43.60
Declination 00 31 08.92 (0.3) 00 31 09.12 00 31 08.93 (0.5) 00 31 09.16 (0.3) 00 31 09.13
Spectral type DA DAZH: DAZH DAZH: DA
Effective temperature [K] 14561.0 (318) 20188.0 16514.0 (417)
log(g) [cgs] 8.04 (0.2) 8.38 8.10 (0.09)
Mass [M] 0.6375078482691198 (0.3) 0.853
log(Luminosity) [L]
Cooling age [Gyr] 0.1511
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] 2.06 (0.7) 1.89 (1) 2.06 (0.7)
Distance [pc] 484.89 (165) 530.24 (290) 484.90 (165)
Composition H
Proper motion (right ascension) [mas/yr] 3.723582844 (0.7) 2.218723362 (2) 3.724 (0.7)
Proper motion (declination) [mas/yr] -14.5943005 (0.6) -15.80893504 (1) -14.594 (0.6)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.53 (0.06) 20.41 (0.05) 20.41 (0.05)
g magnitude 20.13 (0.02) 20.11 (0.02) 20.11 (0.02)
r magnitude 20.35 (0.03) 20.26 (0.02) 20.26 (0.02)
i magnitude 20.54 (0.05) 20.48 (0.04) 20.48 (0.04)
z magnitude 20.93 (0.2) 20.78 (0.2) 20.78 (0.2)
G magnitude 20.20 (0.06) 20.26 20.20 (0.006)
BP magnitude 20.19 (0.06) 20.01
RP magnitude 20.31 (0.1) 20.17
Pan g magnitude 20.10 (0.03)
Pan r magnitude 20.36 (0.02)
Pan i magnitude 20.55 (0.03)
Pan z magnitude 20.74 (0.06)
Pan y magnitude
E(B-V) 0.041

* 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.