SDSS J171709.25+300521.6

All names: SDSS J171709.25+300521.6, GALEX J171709.2+300522, Gaia DR2 4599669249689300992, WD 1715+301, SDSS J171709.25+300521.60, Gaia DR3 4599669249689300992, Gaia EDR3 4599669249689300992

Parameter Unit Gaia EDR3 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 17 17 09.24 (0.4) 17 17 09.25 17 17 09.24 (0.5) 17 17 09.25 (0.4) 17 17 09.25 17 17 08.74 17 17 09.25
Declination 30 05 21.67 (0.4) 30 05 21.66 30 05 21.67 (0.5) 30 05 21.65 (0.4) 30 05 21.68 30 05 19.68 30 05 21.65
Spectral type DB DB DB DB DB DB
Effective temperature [K] 18579.0 22105.0 20992.0 19005.0 (1555) 21329.0 (1760)
log(g) [cgs] 7.75 8.11 8.15 8.01 (0.3) 7.62 (0.3)
Mass [M] 0.466 0.665 0.691
log(Luminosity) [L]
Cooling age [Gyr] 0.0829
log(H/He) <-5.162
log(C/He)
log(Ca/He)
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] 1.82 (0.5) 1.20 (0.6) 1.82 (0.5)
Distance [pc] 549.61 (156) 835.50 (408) 549.60 (156)
Composition He
Proper motion (right ascension) [mas/yr] -9.763878528 (0.5) -7.63247149 (1) -9.764 (0.5) -6.1
Proper motion (declination) [mas/yr] 1.299216551 (0.6) 0.65226692 (1) 1.299 (0.6) 5.5
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.10 (0.04) 20.10 (0.04) 20.14 (0.04) 20.13 20.11 (0.04)
g magnitude 20.28 (0.02) 20.28 (0.02) 20.29 (0.02) 20.29 20.28 (0.02)
r magnitude 20.56 (0.03) 20.56 (0.03) 20.58 (0.03) 20.58 20.57 (0.03)
i magnitude 20.85 (0.05) 20.85 (0.05) 20.85 (0.05) 20.86 20.85 (0.05)
z magnitude 21.24 (0.2) 21.25 (0.2) 21.24 (0.2) 21.25 21.25 (0.2)
G magnitude 20.40 (0.08) 20.46 20.40 (0.006)
BP magnitude 20.42 (0.08) 20.38
RP magnitude 20.34 (0.1) 20.43
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.028

* 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.