GD 358

All names: SDSS J164718.37+322833.0, EGGR 239, PLX 3821.01, 16473+3228, PG 1645+326, TIC 219074038, 1645+325, USNO-B1.0 1224-00338947, LSPM J1647+3228, GEN# +6.10060358, KUV 433-8, Gaia DR2 1314045729544380288, LAMOST J164718.38+322832.8, USNO 638, 2MASS J16471839+3228328, Gaia DR3 1314045729544380288, GALEX J164718.4+322831, Gaia EDR3 1314045729544380288, WDJ164718.39+322832.87, LAMOST J164718.35+322832.9, WD 1645+325, GD 358, KUV 16454+3234, 1SWASP J164718.40+322833.0, V* V777 Her, PM J16473+3228, WD 1645+32, uvby98 610060358 V, [TFW97] J164718.49+322832.62, UCAC4 613-056335, UCAC2 43112556, SDSS J164718.36+322832.9, UBV M 43078, ASCC 595989

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Leggett et al. 2018 MWDD HE Gaia DR2 Bedard et al. 2017 Stilism Guo et al. 2015 Limoges et al. 2015 Bergeron et al. 2011 Provencal et al. 2000 Beauchamp et al. 1999 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Research Corporation White Dwarf Catalog (McCook & Sion 1999)
Right ascension 16 47 18.19 (0.02) 16 47 18.20 (0.02) 16 47 18.19 16 47 18.39 (0.02) 16 47 18.20 16 47 18.36
Declination 32 28 33.27 (0.02) 32 28 33.26 (0.03) 32 28 33.27 32 28 32.86 (0.02) 32 28 33.26 32 28 25.68
Spectral type DB DB2.3 DB DB DB DB DB DB DB DB2 DBV DBV2
Effective temperature [K] 18811.0 (118) 21926.0 (3668) 25219.0 24937.0 (1018) 25250.0 (370) 24940.0 (1115) 27000.0 (1000) 24900.0 26468.0 (403) 24700.0
log(g) [cgs] 7.81 (0.006) 7.89 (0.06) 8.00 7.92 (0.05) 7.92 (0.05) 7.92 (0.06) 7.91 8.02 (0.008)
Mass [M] 0.494 (0.005) 0.544 (0.04) 0.608 0.57 (0.03) 0.57 (0.03) 0.621 (0.006)
log(Luminosity) [L] -1.17 -1.19
Cooling age [Gyr] 0.0360 (0.03) 0.0219 0.0229
log(H/He) <-4.58 (0.9) <-5
log(C/He) -5.65 (0.1)
log(Ca/He)
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] 23.24 (0.02) 22.69 (0.4) 23.20 (0.03) 27.30 (3) 23.24 23.24 (0.02) 23.20 (0.03) 27.30 (3)
Distance [pc] 43.02 (0.04) 44.07 (0.7) 43.10 (0.06) 36.60 (4) 36.60 (4) 46.00 43.02 43.02 (0.04) 43.10 (0.06) 36.63 (4)
Composition He He He He He
Proper motion (right ascension) [mas/yr] -158.9551567 (0.02) -159.0955524 (0.05) -158.955 (0.02) -159.0955524
Proper motion (declination) [mas/yr] 25.43814381 (0.03) 25.27595249 (0.06) 25.438 (0.03) 25.27595249
Variability VAR VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 13.53 (0.009) 13.54
V magnitude 13.65 13.65 (0.009) 13.65
R magnitude 13.75 (0.009)
I magnitude 13.85 (0.008)
J magnitude 14.13 (0.03)
H magnitude 14.21 (0.05)
K magnitude 14.41 (0.1)
u magnitude 14.08 (0.008) 13.22 (0.003)
g magnitude 13.68 (0.003) 13.39 (0.003)
r magnitude 15.65 (0.01) 13.78 (0.003)
i magnitude 14.60 (0.006) 14.06 (0.003)
z magnitude 14.58 (0.006) 14.37 (0.004)
G magnitude 13.58 (0.005) 13.59 13.58 13.58 (0.003) 13.59
BP magnitude 13.48 (0.005) 13.42 13.42
RP magnitude 13.77 (0.004) 13.76 13.76
Pan g magnitude 13.45 (0.02)
Pan r magnitude 13.81 (0.01)
Pan i magnitude 14.12 (0.006)
Pan z magnitude 14.38 (0.004)
Pan y magnitude 14.57 (0.003)
E(B-V) 0.004

* 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.