WD 1657+620

All names: Gaia DR3 1630530011180816256, ** SLN 35A, SDSS J165737.91+620102.1, Gaia EDR3 1630530011180816256, WDS J16576+6201A, Gaia DR2 1630530011180816256, SDSS J165737.91+620102.0, WD 1657+620, GALEX J165737.9+620102

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Tremblay et al. 2011 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Kleinman et al. 2004 Vincent et al. 2023
Right ascension 16 57 37.87 (0.2) 16 57 37.91 16 57 37.87 (0.2) 16 57 37.87 16 57 37.91 (0.2) 16 57 37.91 16 57 36.53 16 57 37.91 16 57 37.91
Declination 62 01 02.17 (0.1) 62 01 02.05 62 01 02.16 (0.2) 62 01 02.17 62 01 02.05 (0.1) 62 01 02.15 62 00 59.40 62 01 02.11 62 01 02.10
Spectral type DA DA DA DA3.5 DA DA2.3 DA DA
Effective temperature [K] 12671.0 24150.0 (820) 18844.0 (1843) 20904.0 (408) 21176.0 (400) 21837.0 (435)
log(g) [cgs] 7.00 7.81 (0.1) 7.41 (0.1) 7.71 (0.08) 7.71 (0.08) 7.82 (0.08)
Mass [M] 0.233 0.54 (0.06) 0.359 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.0224
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] 1.76 (0.2) 1.82 (0.2) 1.76 1.76 (0.2)
Distance [pc] 568.67 (53) 548.00 (59) 568.67 568.67 (53)
Composition H H
Proper motion (right ascension) [mas/yr] -18.78162947 (0.2) -19.27572094 (0.4) -18.782 (0.2) -21.7 -21.0
Proper motion (declination) [mas/yr] 7.545968332 (0.2) 7.561526215 (0.4) 7.546 (0.2) 3.2 8.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.66 (0.02) 18.66 (0.02) 18.73 (0.02) 18.73 18.72 (0.02) 18.73 (0.02)
g magnitude 18.64 (0.008) 18.64 (0.008) 18.65 (0.01) 18.64 18.65 (0.01) 18.64 (0.01)
r magnitude 18.96 (0.01) 18.96 (0.01) 18.99 (0.03) 18.99 18.98 (0.03) 18.99 (0.02)
i magnitude 19.22 (0.02) 19.22 (0.02) 19.22 (0.02) 19.23 19.23 (0.02) 19.23 (0.03)
z magnitude 19.45 (0.07) 19.45 (0.07) 19.48 (0.07) 19.46 19.48 (0.07) 19.46 (0.07)
G magnitude 18.85 (0.02) 18.89 18.85 18.85 (0.004)
BP magnitude 18.84 (0.02) 18.76
RP magnitude 19.07 (0.05) 18.95
Pan g magnitude 18.74 (0.009)
Pan r magnitude 19.00 (0.007)
Pan i magnitude 19.28 (0.01)
Pan z magnitude 19.50 (0.02)
Pan y magnitude 19.50 (0.03)
E(B-V) 0.023

* 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.