SDSS J081708.16+340418.3

All names: WD 0813+342, Gaia EDR3 902628712019828736, Gaia DR2 902628712019828736, SDSS J081708.16+340418.3, Gaia DR3 902628712019828736, GALEX J081708.1+340418, SDSS J081708.16+340418.4

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 08 17 08.15 (0.3) 08 17 08.16 08 17 08.16 (0.4) 08 17 08.16 (0.3) 08 17 08.16 08 17 08.35 08 17 08.16
Declination 34 04 18.22 (0.3) 34 04 18.42 34 04 18.22 (0.3) 34 04 18.41 (0.3) 34 04 18.35 34 04 17.40 34 04 18.36
Spectral type DA DA DA_auto DA DA DA
Effective temperature [K] 9251.0 9410.0 (126) 9318.0 (122)
log(g) [cgs] 7.64 8.06 (0.2) 7.80 (0.2)
Mass [M☉] 0.41 0.498 (0.1)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.4872
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] 2.99 (0.4) 2.99 (0.6) 2.99 (0.4)
Distance [pc] 334.38 (43) 333.95 (72) 334.38 (43)
Composition H
Proper motion (right ascension) [mas/yr] -6.43614009 (0.4) -6.839077561 (0.9) -6.436 (0.4) 1.3
Proper motion (declination) [mas/yr] -12.12641412 (0.3) -12.04005741 (0.7) -12.126 (0.3) -4.3
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.04 (0.04) 20.04 (0.04) 20.04 (0.05) 20.04 20.02 (0.05)
g magnitude 19.55 (0.01) 19.55 (0.01) 19.61 (0.02) 19.61 19.60 (0.02)
r magnitude 19.63 (0.02) 19.62 (0.02) 19.66 (0.03) 19.66 19.65 (0.03)
i magnitude 19.81 (0.03) 19.81 (0.03) 19.74 (0.03) 19.74 19.74 (0.02)
z magnitude 19.89 (0.1) 19.89 (0.1) 20.00 (0.1) 19.99 19.99 (0.1)
G magnitude 19.57 (0.04) 19.61 19.57 (0.005)
BP magnitude 19.70 (0.04) 19.65
RP magnitude 19.33 (0.08) 19.45
Pan g magnitude 19.57 (0.02)
Pan r magnitude 19.62 (0.02)
Pan i magnitude 19.77 (0.02)
Pan z magnitude 19.87 (0.02)
Pan y magnitude 19.62 (0.09)
E(B-V) 0.025

* 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.