[CSC85] 1642.9+4075

All names: [CSC85] 1642.9+4075, USNO-B1.0 1306-00269087, SDSS J164432.15+403925.6, Gaia DR3 1355844759289303680, Gaia EDR3 1355844759289303680, Gaia DR2 1355844759289303680, SDSS J164432.15+403926.21, SDSS J164432.15+403926.2, GALEX J164432.2+403925, SDSS J164432.15+403925.7

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 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 16 44 32.15 (0.1) 16 44 32.15 16 44 32.15 (0.1) 16 44 32.15 16 44 32.15 (0.1)
Declination 40 39 26.38 (0.1) 40 39 25.74 40 39 26.36 (0.2) 40 39 26.38 40 39 25.65 (0.1)
Spectral type DBA DBA DB: DBA sdOB
Effective temperature [K] 15896.0 16659.0 15725.0 16655.0 (51) 17219.0 (103) 16064.0 (1261)
log(g) [cgs] 7.71 7.90 7.80 7.90 (0.04) 8.30 (0.04) 7.92 (0.1)
Mass [M] 0.441 0.537 0.482 0.8009999999999999 (0.03) 0.549 (0.09)
log(Luminosity) [L]
Cooling age [Gyr] 0.1231
log(H/He) -3.389 -3.15 (0.1)
log(C/He)
log(Ca/He) -6.51 (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] 3.09 (0.1) 2.87 (0.2) 3.09 3.09 (0.1)
Distance [pc] 323.92 (13) 347.95 (20) 344.00 323.92 323.92 (13)
Composition He
Proper motion (right ascension) [mas/yr] -0.96631731 (0.1) -1.388912565 (0.3) -0.966 (0.1)
Proper motion (declination) [mas/yr] 46.00530935 (0.2) 45.72502715 (0.4) 46.005 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.30
V magnitude
R magnitude 18.80
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.35 (0.01) 18.36 (0.03) 18.35 (0.01)
g magnitude 18.41 (0.007) 18.42 (0.02) 18.41 (0.007)
r magnitude 18.73 (0.009) 18.74 (0.02) 18.73 (0.009)
i magnitude 19.01 (0.01) 19.02 (0.02) 19.01 (0.01)
z magnitude 19.27 (0.05) 19.25 (0.05) 19.27 (0.05)
G magnitude 18.57 (0.02) 18.60 18.57 18.57 (0.003)
BP magnitude 18.54 (0.02) 18.45
RP magnitude 18.73 (0.03) 18.70
Pan g magnitude 18.45 (0.004)
Pan r magnitude 18.75 (0.005)
Pan i magnitude 19.01 (0.004)
Pan z magnitude 19.23 (0.02)
Pan y magnitude 19.35 (0.05)
E(B-V) 0.019

* 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.