WD 1643+807

All names: Gaia DR2 1710386067532886272, USNO-B1.0 1706-00050470, Gaia EDR3 1710386067532886272, LP 9-175, WD 1643+807, J1639+8038, Gaia DR3 1710386067532886272, EGGR 493, LHS 3231, NLTT 43492, WDJ163927.83+803845.10, LSPM J1639+8038

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 16 39 26.78 (0.1) 16 39 26.81 (0.2) 16 39 26.78 16 39 27.83 (0.1) 16 39 26.81 16 39 09.67
Declination 80 38 51.87 (0.1) 80 38 51.66 (0.1) 80 38 51.87 80 38 45.10 (0.1) 80 38 51.66 80 39 21.96
Spectral type DC DC9 DC9 DA DC9 DC9
Effective temperature [K] 5504.0 (73) 5932.0 5695.0 5979.0 (98)
log(g) [cgs] 8.08 (0.03) 8.32 8.19 8.32 (0.03)
Mass [M] 0.617 (0.03) 0.791 0.688 0.793 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 4.8100 4.5710 4.7920
log(H/He)
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] 16.46 (0.1) 16.55 (0.1) 16.55 (0.1) 16.46 16.46 (0.1) 16.55 (0.1)
Distance [pc] 60.74 (0.4) 60.42 (0.5) 60.44 (0.5) 60.74 60.74 (0.4) 60.44 (0.5)
Composition He
Proper motion (right ascension) [mas/yr] -160.3873107 (0.2) -160.8004928 (0.3) -160.387 (0.2) -160.8004928
Proper motion (declination) [mas/yr] 422.9085755 (0.2) 422.9016766 (0.3) 422.909 (0.2) 422.9016766
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 19.60
V magnitude
R magnitude 18.80
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 18.43 (0.03) 18.45 18.43 18.43 (0.003) 18.45
BP magnitude 18.75 (0.03) 18.72 18.72
RP magnitude 17.97 (0.02) 17.96 17.96
Pan g magnitude 18.78 (0.02) 18.78 (0.03)
Pan r magnitude 18.42 (0.005) 18.42 (0.005)
Pan i magnitude 18.32 (0.006) 18.32 (0.007)
Pan z magnitude 18.28 (0.01) 18.28 (0.01)
Pan y magnitude 18.16 (0.3) 18.16 (0.03)
E(B-V) 0.006

* 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.