SDSS J170539.46+241945.1

All names: SDSS J170539.45+241945.0, SDSS J170539.46+241945.10, SDSS J170539.45+241945.2, GALEX J170539.4+241945, Gaia DR2 4572021102095808640, Gaia DR3 4572021102095808640, Gaia EDR3 4572021102095808640, SDSS J170539.45+241945.1, SDSS J170539.46+241945.1

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Vincent et al. 2024 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 17 05 39.45 (0.06) 17 05 39.46 17 05 39.45 (0.08) 17 05 39.45 17 05 39.46 (0.06) 17 05 39.46
Declination 24 19 45.41 (0.07) 24 19 45.13 24 19 45.39 (0.1) 24 19 45.41 24 19 45.01 (0.07) 24 19 45.09
Spectral type DBA DB DBA DBA DB
Effective temperature [K] 16654.0 15020.0 14730.0 16713.0 (79) 17534.0 (978) 16975.0 (114)
log(g) [cgs] 8.07 7.89 7.87 8.07 (0.06) 8.14 (0.06) 8.16 (0.06)
Mass [M] 0.636 0.528 0.517 0.678 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.1716
log(H/He) -4.86 -4.54 (0.2)
log(C/He)
log(Ca/He) <-6.51
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] 4.17 (0.09) 4.12 (0.1) 4.17 4.17 (0.09)
Distance [pc] 239.85 (5) 242.99 (8) 234.00 239.85 239.85 (5)
Composition He
Proper motion (right ascension) [mas/yr] -8.394545088 (0.08) -8.185979792 (0.2) -8.395 (0.08)
Proper motion (declination) [mas/yr] 24.83466086 (0.1) 24.65781558 (0.2) 24.835 (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 17.84 (0.01) 17.84 (0.01) 17.82 (0.02)
g magnitude 17.90 (0.006) 17.90 (0.006) 17.93 (0.01)
r magnitude 18.21 (0.007) 18.21 (0.007) 18.18 (0.01)
i magnitude 18.45 (0.01) 18.45 (0.01) 18.36 (0.01)
z magnitude 18.69 (0.03) 18.69 (0.03) 18.72 (0.04)
G magnitude 18.04 (0.008) 18.07 18.04 18.04 (0.003)
BP magnitude 17.99 (0.008) 17.93
RP magnitude 18.18 (0.01) 18.17
Pan g magnitude 17.94 (0.005)
Pan r magnitude 18.22 (0.007)
Pan i magnitude 18.48 (0.004)
Pan z magnitude 18.68 (0.01)
Pan y magnitude 18.82 (0.02)
E(B-V) 0.024

* 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.