SDSS J235719.20+244111.5

All names: Gaia DR2 2851588427455095168, Gaia EDR3 2851588427455095168, SDSS J235719.20+244111.52, Gaia DR3 2851588427455095168, USNO-A2.0 1125-20006162, GALEX J235719.1+244111, USNO-B1.0 1146-00579016, SDSS J235719.20+244111.5

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Koester & Kepler 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 23 57 19.21 (0.2) 23 57 19.21 23 57 19.21 (0.2) 23 57 19.21 23 57 19.20 (0.2)
Declination 24 41 11.58 (0.2) 24 41 11.58 24 41 11.58 (0.2) 24 41 11.58 24 41 11.56 (0.2)
Spectral type DBA DBA DB DBA DB
Effective temperature [K] 14041.0 14037.0 11929.0 14860.0 (116) 14419.0 (76) 12414.0 (706)
log(g) [cgs] 8.02 7.86 7.70 8.24 (0.09) 8.00 (0) 7.96 (0.1)
Mass [M] 0.599 0.509 0.425 0.725 (0.05) 0.559 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.2646
log(H/He) -4.761 -4.45 (0.2)
log(C/He)
log(Ca/He) <-7.96
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] 3.20 (0.3) 2.70 (0.4) 3.20 3.20 (0.3)
Distance [pc] 312.65 (25) 370.02 (49) 332.00 312.65 312.65 (25)
Composition He
Proper motion (right ascension) [mas/yr] 8.625053422 (0.2) 8.802455348 (0.6) 8.625 (0.2)
Proper motion (declination) [mas/yr] 1.304096988 (0.2) 1.269964856 (0.3) 1.304 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 19.30
V magnitude
R magnitude 19.40
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.11 (0.02) 19.12 (0.03) 19.11 (0.02)
g magnitude 19.16 (0.01) 19.16 (0.02) 19.16 (0.01)
r magnitude 19.35 (0.01) 19.35 (0.02) 19.35 (0.01)
i magnitude 19.52 (0.02) 19.50 (0.02) 19.50 (0.02)
z magnitude 19.80 (0.07) 19.80 (0.07) 19.80 (0.07)
G magnitude 19.23 (0.03) 19.27 19.23 19.23 (0.004)
BP magnitude 19.26 (0.03) 19.25
RP magnitude 19.24 (0.04) 19.24
Pan g magnitude 19.17 (0.007)
Pan r magnitude 19.38 (0.02)
Pan i magnitude 19.56 (0.02)
Pan z magnitude 19.73 (0.03)
Pan y magnitude 19.87 (0.05)
E(B-V) 0.048

* 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.