SBSS 0818+498

All names: SDSS J082220.52+494246.6, SDSS J082220.50+494246.3, WD 0818+498, PSO J082220.489+494246.350, Gaia DR2 931907263558715392, SDSS J082220.50+494246.37

Parameter Unit MWDD H Pan-STARRS DR1 Gaia DR2 Kepler et al. 2015 SDSS DR10 Simbad
Right ascension 08 22 20.50 (0.1) 08 22 20.52 08 22 20.52
Declination 49 42 46.18 (0.08) 49 42 46.64 49 42 46.63
Spectral type DA DA DA
Effective temperature [K] 20387.0 27064.0 (114)
log(g) [cgs] 7.85 8.17 (0.02)
Mass [M☉] 0.5429999999999999 0.72 (0.01)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.0433
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] 3.97 (0.1)
Distance [pc] 252.13 (8)
Composition H
Proper motion (right ascension) [mas/yr] -17.5750966165 (0.2) -16.0
Proper motion (declination) [mas/yr] -26.6339395887 (0.2) -25.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.50
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.18 (0.02) 17.18 (0.008) 17.18
g magnitude 17.30 (0.02) 17.29 (0.005) 17.29
r magnitude 17.71 (0.02) 17.71 (0.006) 17.71
i magnitude 18.02 (0.02) 18.03 (0.008) 18.03
z magnitude 18.33 (0.03) 18.33 (0.03) 18.33
G magnitude 17.55
BP magnitude 17.39
RP magnitude 17.74
Pan g magnitude 17.36 (0.005)
Pan r magnitude 17.74 (0.004)
Pan i magnitude 18.05 (0.004)
Pan z magnitude 18.29 (0.01)
Pan y magnitude 18.46 (0.1)

* Constant surface field

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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.