SDSS J164026.65+315453.9

All names: Gaia DR2 1312731877573336448, J1640+3154, WD 1638+320, SDSS J164026.65+315454.0, Gaia EDR3 1312731877573336448, SDSS J164026.65+315453.9, Gaia DR3 1312731877573336448

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Coutu et al. 2019 Gaia DR2 Stilism Dufour et al. 2007 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 40 26.65 (0.1) 16 40 26.65 16 40 26.65 16 40 26.65 (0.2) 16 40 26.65 16 40 26.65 (0.1) 16 40 26.65 16 40 26.64 16 40 26.65
Declination 31 54 55.17 (0.1) 31 54 54.00 31 54 53.73 31 54 55.12 (0.2) 31 54 55.17 31 54 53.73 (0.1) 31 54 53.96 31 54 51.12 31 54 53.96
Spectral type DZ DZ DZ DZ DZ DZ DZ DZ
Effective temperature [K] 6857.0 (108) 6840.0 (100) 6976.0 (165) 10082.0 (8) 10082.0 (8)
log(g) [cgs] 8.04 8.00 8.11 (0.04) 7.84 (0.6) 9.72 (0.3)
Mass [M] 0.5988 0.644 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 1.7400
log(H/He) <-3.7486 <-3.0
log(C/He)
log(Ca/He) -9.9822 (0.06) -9.89 (0.08)
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] 9.02 (0.1) 8.96 8.96 (0.2) 9.02 9.02 (0.1)
Distance [pc] 110.82 (2) 111.61 (3) 111.61 (3) 110.00 110.82 110.82 (2)
Composition He He
Proper motion (right ascension) [mas/yr] -0.570402543 (0.1) 0.241356662 (0.4) -0.57 (0.1) 3.6
Proper motion (declination) [mas/yr] 89.43427779 (0.2) 89.55989852 (0.4) 89.434 (0.2) 92.7
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.45 (0.02) 19.45 (0.02) 19.44 (0.04) 19.44 19.43 (0.04)
g magnitude 18.89 (0.009) 18.89 (0.009) 18.93 (0.02) 18.93 18.92 (0.02)
r magnitude 18.74 (0.009) 18.74 (0.009) 18.74 (0.02) 18.74 18.75 (0.02)
i magnitude 18.76 (0.01) 18.76 (0.01) 18.80 (0.02) 18.80 18.81 (0.02)
z magnitude 18.89 (0.04) 18.89 (0.04) 18.87 (0.05) 18.87 18.87 (0.05)
G magnitude 18.77 (0.02) 18.81 18.77 18.77 (0.003)
BP magnitude 18.99 (0.02) 18.93
RP magnitude 18.53 (0.02) 18.44
Pan g magnitude 18.89 (0.006)
Pan r magnitude 18.78 (0.005)
Pan i magnitude 18.81 (0.006)
Pan z magnitude 18.93 (0.01)
Pan y magnitude 19.01 (0.06)
E(B-V) 0.014

* 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.