SDSS J170727.10+203153.2

All names: SDSS J170727.10+203153.2, Gaia DR2 4561740672674992512, SDSS J170727.11+203153.3, GALEX J170727.1+203153, Gaia EDR3 4561740672674992512, SDSS J170727.11+203153.2, SDSS J170727.11+203153.25, Gaia DR3 4561740672674992512

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 17 07 27.11 (0.09) 17 07 27.11 17 07 27.11 (0.1) 17 07 27.11 17 07 27.11 (0.09)
Declination 20 31 53.15 (0.09) 20 31 53.25 20 31 53.15 (0.1) 20 31 53.15 20 31 53.27 (0.09)
Spectral type DB DB DB DB DB DB
Effective temperature [K] 42389.0 (794) 44327.0 46369.0 29644.0 44920.0 (668) 44368.0 (1000) 40722.0 (3323)
log(g) [cgs] 7.76 (0.08) 7.77 7.86 7.38 7.78 (0.06) 7.78 (0.05) 7.73 (0.1)
Mass [M] 0.53 (0.03) 0.533 0.572 0.364 0.53 (0.01) 0.509 (0.07)
log(Luminosity) [L] -0.14 (0.06)
Cooling age [Gyr] 0.0032 (0.0005) 0.0113
log(H/He) <-3.251 <-2.73
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] 1.54 (0.1) 1.45 (0.2) 1.54 1.54 (0.1)
Distance [pc] 650.74 (55) 689.59 (82) 703.00 650.74 650.75 (55)
Composition He He
Proper motion (right ascension) [mas/yr] 0.328832021 (0.1) 0.732334696 (0.2) 0.329 (0.1)
Proper motion (declination) [mas/yr] -7.5431222 (0.1) -7.8023818 (0.2) -7.543 (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 17.86 (0.01) 17.86 (0.01) 17.86 (0.01)
g magnitude 18.18 (0.007) 18.18 (0.01) 18.18 (0.007)
r magnitude 18.67 (0.009) 18.67 (0.01) 18.67 (0.009)
i magnitude 19.01 (0.01) 19.01 (0.01) 19.01 (0.01)
z magnitude 19.37 (0.06) 19.37 (0.06) 19.36 (0.06)
G magnitude 18.40 (0.01) 18.44 18.40 18.40 (0.003)
BP magnitude 18.30 (0.01) 18.22
RP magnitude 18.69 (0.03) 18.67
Pan g magnitude 18.24 (0.004)
Pan r magnitude 18.64 (0.01)
Pan i magnitude 19.01 (0.01)
Pan z magnitude 19.25 (0.01)
Pan y magnitude 19.41 (0.06)
E(B-V) 0.044

* 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.