EGGR 908

All names: USNO-B1.0 1023-00759477, PG 2246+121, EGGR 908, V* V393 Peg, Gaia DR3 2719317414856391040, SDSS J224845.52+122007.6, LAMOST J224845.52+122007.8, Gaia EDR3 2719317414856391040, Gaia DR2 2719317414856391040, WD 2246+120

Parameter Unit Gaia EDR3 Pan-STARRS DR1 MWDD HE Gaia DR2 Stilism Bergeron et al. 2011 Beauchamp et al. 1999 Vincent et al. 2024 Simbad White Dwarf Research Corporation White Dwarf Catalog (McCook & Sion 1999)
Right ascension 22 48 45.57 (0.07) 22 48 45.57 (0.1) 22 48 45.57 22 48 45.48 (0.07) 22 48 44.28
Declination 12 20 07.91 (0.06) 12 20 07.89 (0.08) 12 20 07.91 12 20 07.22 (0.06) 12 19 58.44
Spectral type DB DB DB DB DB4 DBV DB4
Effective temperature [K] 21355.0 27070.0 (1521) 27200.0 22392.0 (1484) 23200.0
log(g) [cgs] 7.94 7.92 (0.07) 7.89 7.96 (0.03)
Mass [M] 0.567 0.57 (0.04) 0.58 (0.02)
log(Luminosity) [L] -1.04
Cooling age [Gyr] 0.0444 0.0158
log(H/He) <-4.27 (0.7)
log(C/He)
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] 5.73 (0.08) 5.71 (0.1) 5.73 5.73 (0.08)
Distance [pc] 174.62 (2) 175.22 (4) 199.00 174.62 174.62 (2)
Composition He He He
Proper motion (right ascension) [mas/yr] 80.59620308 (0.1) 80.74675138 (0.2) 80.596 (0.1)
Proper motion (declination) [mas/yr] 43.25808088 (0.08) 43.45940379 (0.2) 43.258 (0.08)
Variability VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.60 16.23
V magnitude 16.73 16.73
R magnitude 16.60
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 16.68 (0.006) 16.71 16.68 16.68 (0.003)
BP magnitude 16.59 (0.006) 16.55
RP magnitude 16.86 (0.01) 16.86
Pan g magnitude 16.54 (0.007)
Pan r magnitude 16.88 (0.003)
Pan i magnitude 17.20 (0.004)
Pan z magnitude 17.47 (0.006)
Pan y magnitude 17.61 (0.009)
E(B-V) 0.026

* 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.