V* V824 Her

All names: GALEX J165657.4+155628, V* V824 Her, ** ZUC 14B, SDSS J165657.44+155627.9, Gaia DR3 4557852490326063232, WDS J16570+1556B, WD 1654+160, Gaia DR2 4557852490326063232, Gaia EDR3 4557852421606585856, UCAC4 530-062640, PG 1654+160

Parameter Unit Gaia EDR3 Gaia DR2 Stilism Koester et al. 2014 Bergeron et al. 2011 Voss et al. 2007 Beauchamp et al. 1999 Vincent et al. 2024 Simbad White Dwarf Research Corporation White Dwarf Catalog (McCook & Sion 1999)
Right ascension 16 56 57.59 (0.03) 16 56 57.40 (0.05) 16 56 57.40 16 56 57.47 (0.03) 16 56 57.38
Declination 15 56 26.28 (0.02) 15 56 28.68 (0.04) 15 56 28.70 15 56 27.79 (0.03) 15 56 22.92
Spectral type DB DB DB DB2 DBV DB2
Effective temperature [K] 29410.0 (500) 29410.0 (1613) 25447.0 27800.0 19140.0 (427) 24300.0
log(g) [cgs] 7.97 (0.08) 7.97 (0.08) 7.85 8.00 7.95 (0.02)
Mass [M] 0.6 (0.04) 0.527 0.569 (0.02)
log(Luminosity) [L] -0.92
Cooling age [Gyr] 0.0117
log(H/He) <-3.98 (1)
log(C/He) <-6.4
log(Ca/He)
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He) <-7.0
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] 6.71 (0.05) 6.81 (0.07) 6.82 6.82 (0.05)
Distance [pc] 148.93 (1) 146.86 (1) 187.00 146.67 146.67 (1)
Composition He He He
Proper motion (right ascension) [mas/yr] -58.70710036 (0.03) -59.78532826 (0.09) -59.753 (0.04)
Proper motion (declination) [mas/yr] 56.17274748 (0.03) 56.9358412 (0.08) 57.028 (0.03)
Variability VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.15 16.15
V magnitude 16.55
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 16.27 (0.006)
g magnitude 16.36 (0.004)
r magnitude 16.71 (0.005)
i magnitude 17.00 (0.006)
z magnitude 17.30 (0.01)
G magnitude 16.19 (0.008) 16.54 16.51 16.51 (0.003)
BP magnitude 17.91 (0.008) 16.38
RP magnitude 14.92 (0.001) 16.61
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
E(B-V) 0.031

* 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.