EGGR 148

Other names: 2140+207, LHS 3703

Parameter Unit Holberg et al. 2016 Simbad
Right ascension 21 42 41.00
Declination 20 59 58.24
Spectral type DQ6.1 DQ6
Effective temperature [K] 8256.0
log(g) [cgs] 7.61
Mass [M☉] 0.48
log(Luminosity) [L☉]
Cooling age [Gyr] 0.8200
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] 79.90 79.90
Distance [pc] 12.52 12.52
Composition He
Proper motion (right ascension) [mas/yr] -227.0
Proper motion (declination) [mas/yr] -643.0
Variability
Magnetic
Db [MG]
Infrared excess (disk)
Binarity
B magnitude 13.40
V magnitude 13.25 13.27
R magnitude 12.90
I magnitude 12.50
J magnitude 12.98
H magnitude 12.93
K magnitude 12.92
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.