SDSS J165339.15+174838.9

All names: Gaia DR3 4559401216870747136, SDSS J165339.17+174838.8, Gaia DR2 4559401216870747136, SDSS J165339.15+174838.9, SDSS J165339.17+174838.84, GALEX J165339.1+174838, Gaia EDR3 4559401216870747136

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 Simbad Vincent et al. 2023
Right ascension 16 53 39.16 (0.2) 16 53 39.15 16 53 39.16 (0.3) 16 53 39.15 (0.2)
Declination 17 48 38.79 (0.2) 17 48 38.94 17 48 38.80 (0.2) 17 48 38.92 (0.2)
Spectral type DB DB DB DB+MS
Effective temperature [K] 18714.0 16633.0 13925.0 19403.0 (288) 19000.0 (258)
log(g) [cgs] 8.17 7.63 7.46 8.20 (0.06) 8.10 (0.06)
Mass [M] 0.697 0.407 0.335 0.6459999999999999 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.1335
log(H/He) -4.916 <-3.98
log(C/He)
log(Ca/He) <-4.55
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] 2.15 (0.3) 1.70 (0.4) 2.15 (0.3)
Distance [pc] 466.10 (68) 586.87 (138) 454.00 466.09 (68)
Composition He
Proper motion (right ascension) [mas/yr] 11.98971547 (0.2) 12.24031913 (0.5) 11.99 (0.2)
Proper motion (declination) [mas/yr] -8.305332995 (0.2) -9.055760622 (0.5) -8.305 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.34 (0.02) 19.34 (0.02) 19.34 (0.02)
g magnitude 19.41 (0.01) 19.41 (0.01) 19.41 (0.01)
r magnitude 19.66 (0.01) 19.66 (0.01) 19.66 (0.01)
i magnitude 19.87 (0.02) 19.87 (0.02) 19.87 (0.02)
z magnitude 20.09 (0.09) 20.09 (0.09) 20.09 (0.09)
G magnitude 19.52 (0.02) 19.58 19.52 (0.004)
BP magnitude 19.49 (0.02) 19.49
RP magnitude 19.66 (0.05) 19.59
Pan g magnitude 19.44 (0.008)
Pan r magnitude 19.67 (0.02)
Pan i magnitude 19.92 (0.01)
Pan z magnitude 20.17 (0.03)
Pan y magnitude 20.17 (0.05)
E(B-V) 0.062

* 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.