SDSS J172822.61+081549.3

All names: Gaia DR2 4490308833894507008, Gaia EDR3 4490308833894507008, J1728+0815, Gaia DR3 4490308833894507008, GALEX J172822.6+081550, SDSS J172822.61+081549.3, SDSS J172822.61+081549.30

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Coutu et al. 2019 Gaia DR2 Stilism Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 17 28 22.61 (0.4) 17 28 22.61 17 28 22.62 17 28 22.61 (0.7) 17 28 22.62 (0.4) 17 28 22.61
Declination 08 15 49.17 (0.4) 08 15 49.24 08 15 49.20 08 15 49.17 (0.7) 08 15 49.21 (0.4) 08 15 49.26
Spectral type DBZA DBAZ DBAZ sdOB:
Effective temperature [K] 14318.0 10854.0 10597.0 (628) 14245.0 (467)
log(g) [cgs] 7.58 8.59 8.57 8.43 (0.3)
Mass [M] 0.381 0.963 0.9497
log(Luminosity) [L]
Cooling age [Gyr] 1.4400
log(H/He) -4.099 -4.2386 (0.4)
log(C/He)
log(Ca/He) -9.8409 (0.3)
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] 1.74 (0.6) 3.92 3.92 (1) 1.74 (0.6)
Distance [pc] 575.12 (212) 254.99 (64) 254.99 (64) 575.11 (212)
Composition He
Proper motion (right ascension) [mas/yr] -1.903457197 (0.5) -6.590341912 (2) -1.903 (0.6)
Proper motion (declination) [mas/yr] -2.996553595 (0.5) -2.444346883 (2) -2.997 (0.5)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.21 (0.05) 20.24 (0.05) 20.24 (0.05)
g magnitude 20.14 (0.02) 20.19 (0.02) 20.19 (0.02)
r magnitude 20.24 (0.03) 20.27 (0.02) 20.27 (0.02)
i magnitude 20.45 (0.04) 20.47 (0.04) 20.47 (0.04)
z magnitude 20.68 (0.2) 20.67 (0.2) 20.67 (0.2)
G magnitude 20.19 (0.06) 20.24 20.19 (0.006)
BP magnitude 20.10 (0.06) 20.17
RP magnitude 20.12 (0.1) 20.04
Pan g magnitude 20.16 (0.01)
Pan r magnitude 20.29 (0.01)
Pan i magnitude 20.66 (0.05)
Pan z magnitude 20.64 (0.06)
Pan y magnitude
E(B-V) 0.138

* 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.