SDSS J164139.07+251220.7

All names: WD 1639+253, Gaia DR3 1301031566321301888, SDSS J164139.07+251220.8, SDSS J164139.07+251220.7, Gaia DR2 1301031566321301888, GALEX J164139.0+251221, Gaia EDR3 1301031566321301888

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 41 39.07 (0.2) 16 41 39.07 16 41 39.07 (0.3) 16 41 39.07 (0.2) 16 41 39.07 16 41 39.14 16 41 39.07
Declination 25 12 20.59 (0.3) 25 12 20.75 25 12 20.59 (0.4) 25 12 20.72 (0.3) 25 12 20.76 25 12 19.80 25 12 20.76
Spectral type DA: DA DA: DA: DA DA
Effective temperature [K] 24881.0 37952.0 (1943) 35245.0 (1553)
log(g) [cgs] 6.71 8.02 (0.3) 8.09 (0.2)
Mass [M☉] 0.238 0.698 (0.1)
log(Luminosity) [L☉]
Cooling age [Gyr]
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] 0.58 (0.4) -0.43 (0.5) 0.58 (0.4)
Distance [pc] 1729.93 (1196) 1729.80 (1196)
Composition H
Proper motion (right ascension) [mas/yr] -2.011770045 (0.3) -3.309231177 (0.8) -2.012 (0.3) 0.0
Proper motion (declination) [mas/yr] -8.337661648 (0.4) -8.561501854 (1) -8.338 (0.4) -6.4
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.46 (0.02) 19.44 (0.03) 19.46 (0.03) 19.45 19.47 (0.03)
g magnitude 19.78 (0.01) 19.79 (0.01) 19.81 (0.02) 19.81 19.82 (0.02)
r magnitude 20.27 (0.02) 20.25 (0.02) 20.28 (0.03) 20.28 20.30 (0.03)
i magnitude 20.55 (0.04) 20.55 (0.05) 20.60 (0.04) 20.59 20.60 (0.05)
z magnitude 21.04 (0.2) 21.07 (0.2) 21.08 (0.2) 21.07 21.09 (0.2)
G magnitude 20.04 (0.04) 20.09 20.04 (0.005)
BP magnitude 19.96 (0.04) 19.86
RP magnitude 20.17 (0.08) 20.22
Pan g magnitude 19.88 (0.01)
Pan r magnitude 20.28 (0.02)
Pan i magnitude 20.67 (0.03)
Pan z magnitude 20.86 (0.1)
Pan y magnitude 18.81 (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.