USNO-A2.0 1200-08108483

All names: GALEX J165603.9+372858, SDSS J165603.96+372858.30, USNO-A2.0 1200-08108483, Gaia DR3 1351336658537271552, SDSS J165603.96+372858.3, WD 1654+375, Gaia EDR3 1351336658537271552, Gaia DR2 1351336658537271552, SDSS J165603.95+372858.3

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 56 03.95 (0.2) 16 56 03.95 16 56 03.95 (0.2) 16 56 03.95 16 56 03.96 (0.2) 16 56 03.95 16 56 03.50 16 56 03.96
Declination 37 28 59.18 (0.2) 37 28 58.37 37 28 59.15 (0.2) 37 28 59.18 37 28 58.33 (0.2) 37 28 58.37 37 28 56.28 37 28 58.35
Spectral type DB DB DB DB DB DB DB
Effective temperature [K] 14878.0 13339.0 12281.0 12718.0 (910) 15508.0 (258) 14466.0 (303)
log(g) [cgs] 8.44 7.65 7.54 7.61 (0.1) 8.40 (0.2) 8.28 (0.2)
Mass [M] 0.868 0.409 0.359 0.391 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.2104
log(H/He) -5.783
log(C/He)
log(Ca/He)
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] 2.24 (0.2) 2.15 (0.3) 2.24 2.24 (0.2)
Distance [pc] 447.06 (41) 464.40 (59) 447.06 447.07 (41)
Composition He
Proper motion (right ascension) [mas/yr] -5.101771343 (0.2) -4.853198283 (0.5) -5.102 (0.2) -6.1
Proper motion (declination) [mas/yr] 53.167891 (0.2) 52.62514185 (0.6) 53.168 (0.2) 50.9
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.30 (0.3)
V magnitude
R magnitude 18.90 (0.3)
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.32 (0.02) 19.32 (0.02) 19.22 (0.03) 19.21 19.23 (0.03)
g magnitude 19.31 (0.01) 19.32 (0.01) 19.34 (0.02) 19.34 19.35 (0.02)
r magnitude 19.53 (0.01) 19.53 (0.01) 19.56 (0.02) 19.56 19.56 (0.02)
i magnitude 19.78 (0.02) 19.77 (0.02) 19.76 (0.02) 19.76 19.77 (0.02)
z magnitude 20.11 (0.09) 20.11 (0.09) 19.98 (0.09) 19.98 19.99 (0.09)
G magnitude 19.43 (0.03) 19.47 19.43 19.43 (0.004)
BP magnitude 19.46 (0.03) 19.39
RP magnitude 19.50 (0.05) 19.37
Pan g magnitude 19.38 (0.006)
Pan r magnitude 19.58 (0.009)
Pan i magnitude 19.80 (0.01)
Pan z magnitude 19.94 (0.02)
Pan y magnitude 20.47 (0.3)
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.