SDSS J093844.81+391321.6

All names: SDSS J093844.81+391321.7, Gaia EDR3 800963125271784832, Gaia DR3 800963125271784832, SDSS J093844.81+391321.3, LAMOST J093844.80+391321.6, GALEX J093844.8+391321, SDSS J093844.81+391321.6, SDSS J093844.82+391321.3, Gaia DR2 800963125271784832, SDSS J093844.81+391321.67

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 09 38 44.79 (0.1) 09 38 44.82 09 38 44.79 (0.2) 09 38 44.79 09 38 44.83 (0.1)
Declination 39 13 21.83 (0.1) 39 13 21.31 39 13 21.81 (0.2) 39 13 21.83 39 13 21.11 (0.1)
Spectral type DB DB DB DB DB
Effective temperature [K] 13676.0 13250.0 11899.0 13333.0 (69) 13433.0 (66) 13011.0 (471)
log(g) [cgs] 8.29 8.10 7.98 8.00 (0) 8.00 (0) 8.04 (0.06)
Mass [M] 0.771 0.649 0.574 0.608 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.3816
log(H/He) -6.443 <-5.77
log(C/He)
log(Ca/He) <-9.07
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] 4.76 (0.2) 4.92 (0.2) 4.76 4.76 (0.2)
Distance [pc] 210.26 (7) 203.18 (9) 215.00 210.26 210.26 (7)
Composition He
Proper motion (right ascension) [mas/yr] -26.90554448 (0.1) -26.51525046 (0.3) -26.906 (0.1)
Proper motion (declination) [mas/yr] 45.36872029 (0.1) 45.34086389 (0.5) 45.369 (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 18.12 (0.01) 18.12 (0.01) 18.12 (0.01)
g magnitude 18.15 (0.006) 18.15 (0.01) 18.15 (0.006)
r magnitude 18.41 (0.008) 18.41 (0.01) 18.41 (0.008)
i magnitude 18.59 (0.01) 18.59 (0.01) 18.59 (0.01)
z magnitude 18.77 (0.04) 18.77 (0.04) 18.77 (0.04)
G magnitude 18.27 (0.02) 18.32 18.27 18.27 (0.003)
BP magnitude 18.26 (0.02) 18.20
RP magnitude 18.30 (0.02) 18.30
Pan g magnitude 18.30 (0.008)
Pan r magnitude 18.41 (0.01)
Pan i magnitude 18.63 (0.005)
Pan z magnitude 18.86 (0.03)
Pan y magnitude 19.02 (0.03)
E(B-V) 0.010

* 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.