WD 1218-198

All names: Gaia DR3 3514997906448391168, Gaia EDR3 3514997906448391168, GALEX J122107.3-200704, WD 1218-198, Gaia DR2 3514997902152549632, EC 12185-1950, USNO-B1.0 0698-00267204

Parameter Unit Gaia EDR3 Pan-STARRS DR1 MWDD H Gaia DR2 Stilism Gianninas et al. 2011 Koester et al. 2009 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999)
Right ascension 12 21 07.25 (0.06) 12 21 07.26 (0.1) 12 21 07.25 12 21 07.30 (0.06) 12 21 06.86
Declination -20 07 04.39 (0.04) -20 07 04.39 (0.1) -20 07 04.39 -20 07 04.34 (0.04) -20 07 02.64
Spectral type DA DA DA DA1.4 DA1
Effective temperature [K] 24692.0 35880.0 (592) 35013.0 (81) 31748.0 (721)
log(g) [cgs] 7.33 7.92 (0.07) 7.91 (0.01) 7.71 (0.03)
Mass [M] 0.36 0.62 (0.03) 0.513 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.0168
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] 4.02 (0.08) 3.79 (0.2) 4.02 4.02 (0.08)
Distance [pc] 248.69 (5) 263.61 (13) 236.00 248.69 248.69 (5)
Composition H H
Proper motion (right ascension) [mas/yr] -36.27622864 (0.08) -36.88760172 (0.3) -36.276 (0.09)
Proper motion (declination) [mas/yr] -3.266210641 (0.07) -3.599473925 (0.2) -3.266 (0.07)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.19
V magnitude 16.35 16.35
R magnitude 16.70
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 16.42 (0.002) 16.43 16.42 16.42 (0.003)
BP magnitude 16.27 (0.002) 16.20
RP magnitude 16.67 (0.006) 16.67
Pan g magnitude 16.24 (0.004)
Pan r magnitude 16.66 (0.003)
Pan i magnitude 17.00 (0.002)
Pan z magnitude 17.28 (0.005)
Pan y magnitude 17.46 (0.006)
E(B-V) 0.036

* 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.