Other names: WD 2117+539, 21189+5412, G231-40
| Parameter | Unit | Limoges et al. 2015 | Giammichele et al. 2012 | Gianninas et al. 2011 | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 18 56.27 | ||||
| Declination | 54 12 41.25 | ||||
| Spectral type | DA | DA | DA | ||
| Effective temperature | [K] | 14590 | 14684 | 14680 | |
| log(g) | [cgs] | 7.92 | 7.91 | 7.91 | |
| Mass | [M☉] | 0.57 | 0.56 | 0.56 | |
| log(Luminosity) | [L☉] | -2.12 | -2.10 | ||
| Age | [Gyr] | 0.18 | |||
| 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] | 50.70 | 50.70 | 50.70 | |
| Distance | [pc] | 19.70 | 19.70 | 17.00 | |
| Composition | H | H | H | ||
| Proper motion (right ascension) | [mas/yr] | -85.4 | |||
| Proper motion (declination) | [mas/yr] | 195.2 | |||
| Variability | NOV | ||||
| Magnetic | |||||
| Has a disc | |||||
| B magnitude | 12.47 | ||||
| V magnitude | 12.33 | 12.81 | |||
| R magnitude | 12.90 | ||||
| I magnitude | 13.20 | ||||
| J magnitude | 12.68 | ||||
| H magnitude | 12.79 | ||||
| K magnitude | 12.85 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||