SDSS J163411.31+281211.7

All names: Gaia DR2 1304881879946411648, GALEX J163411.3+281211, SDSS J163411.31+281211.7, SDSS J163411.27+281212.1, Gaia EDR3 1304881884242947200, Gaia DR3 1304881884242947200, SDSS J163411.27+281212.13

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 16 34 11.24 (0.04) 16 34 11.31 16 34 11.24 (0.05) 16 34 11.24 16 34 11.33 (0.04)
Declination 28 12 12.40 (0.05) 28 12 11.77 28 12 12.37 (0.08) 28 12 12.40 28 12 11.59 (0.05)
Spectral type DBA DBA DB DBA DB
Effective temperature [K] 17371.0 16025.0 15529.0 17116.0 (37) 17126.0 (33) 16308.0 (350)
log(g) [cgs] 8.09 7.94 7.91 8.04 (0.02) 7.93 (0.02) 7.97 (0.03)
Mass [M] 0.649 0.557 0.537 0.561 (0.009) 0.577 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.1516
log(H/He) -5.366 -5.05 (0.2)
log(C/He)
log(Ca/He) <-6.17
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] 7.59 (0.06) 7.58 (0.08) 7.59 7.59 (0.06)
Distance [pc] 131.71 (1) 131.94 (1) 130.00 131.71 131.71 (1)
Composition He
Proper motion (right ascension) [mas/yr] -74.71386022 (0.05) -74.85656142 (0.1) -74.714 (0.05)
Proper motion (declination) [mas/yr] 50.15586003 (0.06) 50.25706138 (0.2) 50.156 (0.06)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 17.01 (0.01)
H magnitude 17.05 (0.03)
K magnitude 17.13 (0.08)
u magnitude 16.40 (0.006) 16.41 (0.02) 16.40 (0.006)
g magnitude 16.46 (0.004) 16.46 (0.01) 16.46 (0.004)
r magnitude 16.81 (0.004) 16.81 (0.02) 16.81 (0.004)
i magnitude 17.05 (0.005) 17.05 (0.02) 17.05 (0.005)
z magnitude 17.29 (0.01) 17.29 (0.02) 17.29 (0.01)
G magnitude 16.65 (0.004) 16.67 16.65 16.65 (0.003)
BP magnitude 16.57 (0.004) 16.53
RP magnitude 16.76 (0.006) 16.75
Pan g magnitude 16.54 (0.003)
Pan r magnitude 16.81 (0.003)
Pan i magnitude 17.08 (0.005)
Pan z magnitude 17.31 (0.01)
Pan y magnitude 17.46 (0.02)
E(B-V) 0.017

* 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.