SDSS J165816.34+221044.5

All names: SDSS J165816.34+221044.4, Gaia EDR3 4565386996828484224, SDSS J165816.35+221044.6, WD 1656+222, J1658+2210, SDSS J165816.35+221044.4, SDSS J165816.34+221044.5, Gaia DR2 4565386996828484224, Gaia DR3 4565386996828484224, WDJ165816.35+221044.46, GALEX J165816.2+221043, SDSS J165816.35+221044.5

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 Kilic et al. 2020 MWDD H Gaia DR2 Stilism Tremblay et al. 2011 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 58 16.34 (0.06) 16 58 16.35 16 58 16.34 (0.09) 16 58 16.34 16 58 16.35 (0.06) 16 58 16.34 16 58 16.35 16 58 16.51 16 58 16.35
Declination 22 10 44.74 (0.09) 22 10 44.48 22 10 44.73 (0.1) 22 10 44.74 22 10 44.45 (0.09) 22 10 44.73 22 10 44.59 22 10 40.80 22 10 44.59
Spectral type DA DA DA DA DA DA DA DA DA_auto DA DA DA
Effective temperature [K] 6523.0 (41) 6587.0 (39) 6522.0 (40) 6533.0 6750.0 (120) 6674.0 (81) 7316.0 (63) 6544.0 (54)
log(g) [cgs] 7.97 (0.02) 7.98 (0.02) 7.95 (0.02) 7.96 8.01 (0.2) 8.02 (0.03) 8.84 (0.1) 7.74 (0.1)
Mass [M] 0.573 (0.01) 0.576 (0.02) 0.561 (0.02) 0.566 0.6 (0.1) 0.605 (0.02) 0.469 (0.07)
log(Luminosity) [L]
Cooling age [Gyr] 1.7700 1.6880 1.7783
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] 11.80 (0.1) 11.66 (0.2) 11.66 (0.2) 11.80 11.80 (0.1) 11.66 (0.2)
Distance [pc] 84.73 (0.9) 85.76 (1) 85.79 (1) 84.73 84.73 (0.9) 85.79 (1)
Composition H H H H
Proper motion (right ascension) [mas/yr] -13.71197438 (0.09) -13.8413992 (0.2) -13.712 (0.09) -13.841 -11.1
Proper motion (declination) [mas/yr] 17.94343904 (0.1) 17.66260689 (0.3) 17.943 (0.1) 17.663 15.4
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 17.53 (0.03)
H magnitude
K magnitude
u magnitude 19.23 (0.02) 19.19 (0.02) 19.23 (0.02) 19.19 (0.02) 19.17 (0.03) 19.16 19.20 (0.03)
g magnitude 18.56 (0.007) 18.56 (0.007) 18.58 (0.008) 18.57 (0.02) 18.56 18.58 (0.02)
r magnitude 18.32 (0.007) 18.32 (0.007) 18.30 (0.008) 18.28 (0.01) 18.27 18.30 (0.01)
i magnitude 18.23 (0.009) 18.23 (0.009) 18.21 (0.009) 18.19 (0.01) 18.18 18.20 (0.01)
z magnitude 18.20 (0.02) 18.20 (0.02) 18.21 (0.02) 18.19 (0.03) 18.18 18.20 (0.03)
G magnitude 18.30 (0.02) 18.32 18.30 18.30 (0.003) 18.32
BP magnitude 18.54 (0.02) 18.59 18.59
RP magnitude 17.91 (0.01) 17.92 17.92
Pan g magnitude 18.53 (0.007) 18.53 (0.007)
Pan r magnitude 18.32 (0.005) 18.32 (0.006)
Pan i magnitude 18.25 (0.005) 18.25 (0.004)
Pan z magnitude 18.29 (0.009) 18.29 (0.007)
Pan y magnitude 18.22 (0.02) 18.22 (0.02)
E(B-V) 0.009

* 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.