USNO-B1.0 1148-00245663

All names: USNO-B1.0 1148-00245663, Gaia DR3 1300280909117627008, GALEX J164703.4+245129, SDSS J164703.43+245129.1, WD 1644+249, SDSS J164703.44+245129.0, Gaia DR2 1300280904820149760, Gaia EDR3 1300280909117627008, SDSS J164703.44+245129.10, SDSS J164703.44+245129.1

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Eisenstein et al. 2006 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 47 03.44 (0.2) 16 47 03.44 16 47 03.44 (0.3) 16 47 03.44 16 47 03.44 (0.2) 16 47 03.36 16 47 03.44
Declination 24 51 28.94 (0.2) 24 51 29.16 24 51 28.95 (0.3) 24 51 29.10 24 51 29.19 (0.2) 24 51 24.12 24 51 29.10
Spectral type DB DB DB DB DB DB DB
Effective temperature [K] 30642.0 (2519) 27488.0 32615.0 22041.0 31700.0 (1000) 29647.0 (1447)
log(g) [cgs] 7.96 (0.3) 7.71 8.07 7.82 8.03 (0.1) 8.05 (0.1)
Mass [M] 0.6 (0.2) 0.471 0.66 0.504 0.641 (0.08)
log(Luminosity) [L] -0.85 (0.2)
Cooling age [Gyr] 0.0093 (0.003) 0.0312
log(H/He) <-3.731
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] 1.13 (0.3) 1.33 (0.5) 1.13 (0.3)
Distance [pc] 887.83 (231) 752.03 (270) 887.86 (231)
Composition He He
Proper motion (right ascension) [mas/yr] 5.693324853 (0.3) 5.091832051 (0.7) 5.693 (0.3)
Proper motion (declination) [mas/yr] -15.81614657 (0.3) -15.75265592 (0.7) -15.816 (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 19.26 (0.03) 19.22 (0.03) 19.26 (0.03) 19.21 19.23 (0.03)
g magnitude 19.48 (0.01) 19.46 (0.02) 19.48 (0.01) 19.46 19.46 (0.02)
r magnitude 19.88 (0.02) 19.85 (0.02) 19.88 (0.02) 19.85 19.86 (0.02)
i magnitude 20.21 (0.03) 20.18 (0.04) 20.21 (0.03) 20.17 20.18 (0.03)
z magnitude 20.47 (0.1) 20.47 (0.1) 20.47 (0.1) 20.46 20.48 (0.1)
G magnitude 19.67 (0.04) 19.73 19.67 (0.004)
BP magnitude 19.60 (0.04) 19.47
RP magnitude 19.84 (0.06) 19.97
Pan g magnitude 19.50 (0.007)
Pan r magnitude 19.84 (0.01)
Pan i magnitude 20.20 (0.02)
Pan z magnitude 20.38 (0.02)
Pan y magnitude 20.49 (0.2)
E(B-V) 0.032

* 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.