Other names: WD 1840+042, 18434+0420, GD 215
| Parameter | Unit | Limoges et al. 2015 | Gianninas et al. 2011 | Bergeron et al. 2001 | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 43 25.73 | ||||
| Declination | 04 20 22.72 | ||||
| Spectral type | DA | DA | DA | ||
| Effective temperature | [K] | 8900 | 9050 | 9090 | |
| log(g) | [cgs] | 8.21 | 8.43 | 8.19 | |
| Mass | [M☉] | 0.73 | 0.88 | 0.71 | |
| log(Luminosity) | [L☉] | -3.15 | -3.11 | ||
| Age | [Gyr] | 1.02 | |||
| 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] | 40.00 | 40.20 | 40.40 | |
| Distance | [pc] | 25.00 | 21.00 | 24.88 | |
| Composition | H | H | H | ||
| Proper motion (right ascension) | [mas/yr] | -112.0 | |||
| Proper motion (declination) | [mas/yr] | 62.0 | |||
| Variability | |||||
| Magnetic | no | ||||
| Has a disc | |||||
| B magnitude | 15.01 | 15.06 | |||
| V magnitude | 14.79 | 14.92 | |||
| R magnitude | 14.66 | 14.20 | |||
| I magnitude | 14.52 | ||||
| J magnitude | 14.53 | 14.44 | |||
| H magnitude | 14.46 | 14.37 | |||
| K magnitude | 14.50 | 14.65 | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||