EGGR 258

Other names: 1633+572, LHS 422

Parameter Unit Holberg et al. 2016 Simbad
Right ascension 16 34 21.64
Declination 57 10 08.29
Spectral type DQ8.2 DQ8
Effective temperature [K] 5958.0
log(g) [cgs] 8.00
Mass [M☉] 0.57
log(Luminosity) [L☉]
Cooling age [Gyr] 2.6200
log(H/He)
log(C/He)
log(Ca/He)
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] 69.20 61.00
Distance [pc] 14.45 16.39
Composition He
Proper motion (right ascension) [mas/yr] -1109.0
Proper motion (declination) [mas/yr] 1203.0
Variability
Magnetic
Db [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude 15.49
V magnitude 15.00 15.00
R magnitude 14.90
I magnitude 14.20
J magnitude 14.11
H magnitude 14.08
K magnitude 14.13
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude

* Constant surface field

Special notes:

Spectra

Absorption lines

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour at Université de Montréal. Please send database updates, corrections, suggestions or bug reports to dufourpa@astro.umontreal.ca.