Other names: WD 1218+497, LB 2318, SDSS J122105.34+492720.5, SDSS J122105.35+492720.5
| Parameter | Unit | Gianninas et al. 2011 | Tremblay et al. 2011 | SDSS DR12 | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|
| Right ascension | 12 21 05.34 | 12 21 05.35 | 12 21 05.35 | |||
| Declination | 49 27 20.52 | 49 27 20.70 | 49 27 20.54 | |||
| Spectral type | DA | DA | DA1.4 | DAM | ||
| Effective temperature | [K] | 35810 | 36440 | 40095 | ||
| log(g) | [cgs] | 7.99 | 7.92 | 7.54 | ||
| Mass | [M☉] | 0.66 | 0.62 | |||
| log(Luminosity) | [L☉] | |||||
| Age | [Gyr] | 0.01 | ||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| 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(Ca/H) | ||||||
| log(Sc/H) | ||||||
| log(Ti/H) | ||||||
| log(Cr/H) | ||||||
| log(Mn/H) | ||||||
| log(Fe/H) | ||||||
| log(Ni/H) | ||||||
| Parallax | [mas] | |||||
| Distance | [pc] | 212.00 | ||||
| Composition | H | H | ||||
| Proper motion (right ascension) | [mas/yr] | -57.0 | ||||
| Proper motion (declination) | [mas/yr] | -7.0 | ||||
| Variability | ||||||
| Magnetic | ||||||
| Has a disc | ||||||
| B magnitude | 16.12 | |||||
| V magnitude | 16.24 | |||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | 14.59 | |||||
| H magnitude | 14.00 | |||||
| K magnitude | 13.84 | |||||
| u magnitude | 15.81 | 15.79 | 15.82 | |||
| g magnitude | 16.11 | 16.10 | 16.12 | |||
| r magnitude | 16.47 | 16.46 | 16.50 | |||
| i magnitude | 16.25 | 16.26 | 16.27 | |||
| z magnitude | 15.89 | 15.89 | 15.90 | |||