SDSS J093849.69+363839.9

All names: SDSS J093849.68+363839.8, GALEX J093849.7+363839, SDSS J093849.69+363839.8, Gaia EDR3 798233866830434560, LAMOST J093849.68+363839.8, SDSS J093849.68+363839.88, SDSS J093849.68+363839.9, Gaia DR2 798233866830434560, Gaia DR3 798233866830434560, SDSS J093849.69+363839.9

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 49.67 (0.1) 09 38 49.69 09 38 49.68 (0.2) 09 38 49.67 09 38 49.69 (0.1)
Declination 36 38 39.77 (0.1) 36 38 39.87 36 38 39.77 (0.2) 36 38 39.77 36 38 39.85 (0.1)
Spectral type DBA DBA DB DBA DB
Effective temperature [K] 19074.0 20845.0 17556.0 18790.0 (96) 18745.0 (200) 21032.0 (1929)
log(g) [cgs] 8.12 8.19 8.00 8.03 (0.04) 7.97 (0.03) 8.10 (0.09)
Mass [M] 0.669 0.715 0.591 0.584 (0.02) 0.66 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 0.1154
log(H/He) -4.766 <-4.63
log(C/He)
log(Ca/He) <-5.06
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] 3.03 (0.2) 3.21 (0.3) 3.03 3.03 (0.2)
Distance [pc] 329.67 (18) 311.23 (27) 318.00 329.67 329.66 (18)
Composition He
Proper motion (right ascension) [mas/yr] -14.09343796 (0.2) -13.84513763 (0.3) -14.093 (0.2)
Proper motion (declination) [mas/yr] -5.096894126 (0.1) -4.962033544 (0.3) -5.097 (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 18.08 (0.01) 18.08 (0.01) 18.08 (0.01)
g magnitude 18.17 (0.007) 18.17 (0.01) 18.17 (0.007)
r magnitude 18.54 (0.009) 18.54 (0.01) 18.54 (0.009)
i magnitude 18.83 (0.01) 18.83 (0.01) 18.83 (0.01)
z magnitude 19.10 (0.04) 19.10 (0.04) 19.10 (0.04)
G magnitude 18.36 (0.02) 18.40 18.36 18.36 (0.003)
BP magnitude 18.28 (0.02) 18.26
RP magnitude 18.53 (0.03) 18.54
Pan g magnitude 18.23 (0.01)
Pan r magnitude 18.55 (0.01)
Pan i magnitude 18.83 (0.008)
Pan z magnitude 19.05 (0.01)
Pan y magnitude 19.22 (0.03)
E(B-V) 0.016

* 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.