SDSS J161735.37+311645.4

All names: SDSS J161735.36+311645.3, Gaia DR3 1319315581400551936, Gaia DR2 1319315581400551936, GALEX J161735.3+311645, Gaia EDR3 1319315581400551936, LAMOST J161735.36+311645.4, SDSS J161735.37+311645.4, SDSS J161735.37+311645.41

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Simbad Vincent et al. 2023
Right ascension 16 17 35.36 (0.1) 16 17 35.37 16 17 35.36 (0.2) 16 17 35.37 (0.1)
Declination 31 16 45.46 (0.2) 31 16 45.36 31 16 45.46 (0.3) 31 16 45.30 (0.2)
Spectral type DBA DBA DBA DB
Effective temperature [K] 18470.0 18860.0 16117.0 19610.0 (127) 19431.0 (238)
log(g) [cgs] 8.01 7.32 7.14 8.07 (0.05) 8.02 (0.05)
Mass [M] 0.599 0.31 0.257 0.614 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.0682
log(H/He) -3.593 -3.22 (0.3)
log(C/He)
log(Ca/He) <-4.53
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] 1.81 (0.2) 1.28 (0.3) 1.81 (0.2)
Distance [pc] 551.32 (62) 782.24 (194) 484.00 551.33 (62)
Composition He
Proper motion (right ascension) [mas/yr] -4.790669872 (0.2) -4.810337503 (0.5) -4.791 (0.2)
Proper motion (declination) [mas/yr] 10.33245181 (0.3) 10.29251349 (0.7) 10.332 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.04 (0.02) 19.03 (0.03) 19.04 (0.02)
g magnitude 19.16 (0.01) 19.18 (0.02) 19.16 (0.01)
r magnitude 19.42 (0.01) 19.42 (0.02) 19.42 (0.01)
i magnitude 19.72 (0.02) 19.71 (0.03) 19.71 (0.02)
z magnitude 20.36 (0.1) 20.34 (0.1) 20.36 (0.1)
G magnitude 19.28 (0.03) 19.33 19.28 (0.004)
BP magnitude 19.32 (0.03) 19.18
RP magnitude 19.39 (0.05) 19.48
Pan g magnitude 19.17 (0.007)
Pan r magnitude 19.46 (0.007)
Pan i magnitude 19.74 (0.009)
Pan z magnitude 19.97 (0.04)
Pan y magnitude 19.93 (0.2)
E(B-V) 0.023

* 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.