SDSS J164225.42+344108.2

All names: WD 1640+347, SDSS J164225.43+344108.2, SDSS J164225.42+344108.2, Gaia DR3 1326768895848096128, GALEX J164225.4+344108, Gaia EDR3 1326768895848096128, Gaia DR2 1326768895848096128

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H 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 42 25.44 (0.1) 16 42 25.43 16 42 25.44 (0.1) 16 42 25.44 16 42 25.42 (0.1) 16 42 25.43 16 42 25.15 16 42 25.43
Declination 34 41 07.87 (0.1) 34 41 08.27 34 41 07.88 (0.2) 34 41 07.87 34 41 08.31 (0.1) 34 41 08.24 34 41 05.64 34 41 08.24
Spectral type DA DA DA DA_auto DA DA DA
Effective temperature [K] 7882.0 7971.0 (202) 8221.0 (67) 7813.0 (67)
log(g) [cgs] 8.00 8.01 (0.05) 8.47 (0.2) 7.89 (0.1)
Mass [M] 0.594 0.599 (0.04) 0.537 (0.08)
log(Luminosity) [L]
Cooling age [Gyr] 1.1170
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 7.76 (0.2) 7.81 (0.2) 7.76 7.76 (0.2)
Distance [pc] 128.93 (3) 128.08 (3) 128.93 128.93 (3)
Composition H
Proper motion (right ascension) [mas/yr] 10.23618029 (0.1) 10.80100738 (0.3) 10.236 (0.1) 12.7
Proper motion (declination) [mas/yr] -27.53312175 (0.2) -26.88782761 (0.4) -27.533 (0.2) -33.2
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.08 (0.02) 19.08 (0.02) 19.07 (0.03) 19.07 19.07 (0.03)
g magnitude 18.67 (0.008) 18.66 (0.008) 18.67 (0.02) 18.67 18.68 (0.02)
r magnitude 18.59 (0.009) 18.59 (0.009) 18.61 (0.02) 18.61 18.60 (0.02)
i magnitude 18.59 (0.01) 18.59 (0.01) 18.60 (0.02) 18.60 18.59 (0.02)
z magnitude 18.66 (0.03) 18.66 (0.03) 18.65 (0.03) 18.65 18.65 (0.03)
G magnitude 18.54 (0.02) 18.57 18.54 18.54 (0.003)
BP magnitude 18.72 (0.02) 18.69
RP magnitude 18.29 (0.02) 18.28
Pan g magnitude 18.64 (0.007)
Pan r magnitude 18.60 (0.006)
Pan i magnitude 18.61 (0.003)
Pan z magnitude 18.69 (0.02)
Pan y magnitude 18.74 (0.03)
E(B-V) 0.015

* 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.