SDSS J151729.45+433028.6

All names: Gaia EDR3 1394990877932120192, SDSS J151729.46+433028.7, SDSS J151729.46+433028.70, SDSS J151729.44+433028.8, SDSS J151729.46+433028.6, Gaia DR3 1394990877932120192, SDSS J151729.45+433028.6, GALEX J151729.4+433029, Gaia DR2 1394990877932120192

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 17 29.44 (0.1) 15 17 29.46 15 17 29.44 (0.1) 15 17 29.47 (0.1) 15 17 29.46
Declination 43 30 28.85 (0.1) 43 30 28.67 43 30 28.84 (0.2) 43 30 28.56 (0.1) 43 30 28.67
Spectral type DB DB DB DB DB
Effective temperature [K] 32075.0 (1460) 25112.0 26203.0 20630.0 28934.0 (377) 26894.0 (631)
log(g) [cgs] 8.04 (0.1) 8.01 8.12 8.01 8.00 (0) 7.92 (0.06)
Mass [M] 0.64 (0.08) 0.612 0.676 0.603 0.565 (0.03)
log(Luminosity) [L] -0.81 (0.1)
Cooling age [Gyr] 0.0079 (0.001) 0.0607
log(H/He) -4.045 <-2.92
log(C/He)
log(Ca/He) <-4.0
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] 2.72 (0.1) 2.63 (0.2) 2.72 (0.1)
Distance [pc] 367.41 (18) 380.33 (23) 448.00 367.42 (18)
Composition He He
Proper motion (right ascension) [mas/yr] -19.88817324 (0.1) -20.05433239 (0.3) -19.888 (0.1)
Proper motion (declination) [mas/yr] 17.88165874 (0.2) 17.95381398 (0.4) 17.882 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.14 (0.01) 18.14 (0.01) 18.15 (0.02)
g magnitude 18.32 (0.007) 18.32 (0.007) 18.33 (0.02)
r magnitude 18.71 (0.009) 18.71 (0.009) 18.69 (0.02)
i magnitude 19.01 (0.02) 19.02 (0.01) 19.01 (0.02)
z magnitude 19.26 (0.05) 19.26 (0.05) 19.25 (0.05)
G magnitude 18.51 (0.02) 18.55 18.51 (0.003)
BP magnitude 18.47 (0.02) 18.38
RP magnitude 19.11 (0.08) 18.72
Pan g magnitude 18.38 (0.009)
Pan r magnitude 18.69 (0.004)
Pan i magnitude 19.01 (0.007)
Pan z magnitude 19.27 (0.03)
Pan y magnitude 19.46 (0.03)
E(B-V) 0.022

* 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.