SDSS J003115.10+083004.9

All names: Gaia EDR3 2749837108863857024, Gaia DR3 2749837108863857024, Gaia DR2 2749837108863857024, SDSS J003115.10+083004.9, SDSS J003115.10+083004.83, GALEX J003115.0+083005, SDSS J003115.10+083004.8, [TMD2009] HCG 2 1, USNO-B1.0 0985-00004536

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 00 31 15.09 (0.2) 00 31 15.10 00 31 15.09 (0.3) 00 31 15.09 00 31 15.11 (0.2)
Declination 08 30 04.78 (0.2) 08 30 04.94 08 30 04.79 (0.3) 08 30 04.78 08 30 05.09 (0.2)
Spectral type DBA DBA DB DBA DB
Effective temperature [K] 13513.0 12959.0 11654.0 13448.0 (102) 13727.0 (97) 12458.0 (681)
log(g) [cgs] 7.98 8.04 7.92 8.00 (0) 8.00 (0) 7.94 (0.1)
Mass [M] 0.577 0.608 0.539 0.549 (0.09)
log(Luminosity) [L]
Cooling age [Gyr] 0.3721
log(H/He) -5.678 -5.32 (0.4)
log(C/He)
log(Ca/He) <-8.62
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] 3.45 (0.2) 3.57 (0.3) 3.45 3.45 (0.2)
Distance [pc] 289.54 (20) 279.87 (25) 295.00 289.54 289.54 (20)
Composition He
Proper motion (right ascension) [mas/yr] -16.73035175 (0.3) -16.89703553 (0.7) -16.73 (0.3)
Proper motion (declination) [mas/yr] -19.76911466 (0.2) -19.76040667 (0.5) -19.769 (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 18.91 (0.02) 18.91 (0.02) 18.91 (0.02)
g magnitude 18.91 (0.009) 18.91 (0.01) 18.91 (0.009)
r magnitude 19.09 (0.01) 19.09 (0.01) 19.09 (0.01)
i magnitude 19.32 (0.02) 19.32 (0.02) 19.32 (0.02)
z magnitude 19.36 (0.06) 19.36 (0.06) 19.36 (0.06)
G magnitude 18.98 (0.03) 19.02 18.98 18.98 (0.004)
BP magnitude 19.03 (0.03) 18.98
RP magnitude 19.05 (0.05) 18.98
Pan g magnitude 18.94 (0.008)
Pan r magnitude 19.12 (0.01)
Pan i magnitude 19.29 (0.008)
Pan z magnitude 19.54 (0.05)
Pan y magnitude 19.56 (0.07)
E(B-V) 0.026

* 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.