Other names: WD 1639+537, 16409+5341, GD 356
| Parameter | Unit | Limoges et al. 2015 | Bergeron et al. 2001 | Simbad | |
|---|---|---|---|---|---|
| Right ascension | 16 40 57.16 | ||||
| Declination | 53 41 09.60 | ||||
| Spectral type | DAH | DC | |||
| Effective temperature | [K] | 7410 | 7510 | ||
| log(g) | [cgs] | 8.06 | 8.14 | ||
| Mass | [M☉] | 0.62 | 0.67 | ||
| log(Luminosity) | [L☉] | -3.40 | -3.42 | ||
| Age | [Gyr] | 1.64 | |||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| 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] | 47.40 | 47.40 | 47.40 | |
| Distance | [pc] | 21.10 | 21.10 | ||
| Composition | He | He | |||
| Proper motion (right ascension) | [mas/yr] | -115.0 | |||
| Proper motion (declination) | [mas/yr] | -191.0 | |||
| Variability | |||||
| Magnetic | yes | ||||
| Has a disc | |||||
| B magnitude | 15.34 | 15.39 | |||
| V magnitude | 15.05 | 15.06 | |||
| R magnitude | 14.84 | 15.10 | |||
| I magnitude | 14.66 | 14.00 | |||
| J magnitude | 14.54 | 14.49 | |||
| H magnitude | 14.46 | 14.48 | |||
| K magnitude | 14.42 | 14.37 | |||
| u magnitude | 15.54 | ||||
| g magnitude | 15.10 | ||||
| r magnitude | 15.00 | ||||
| i magnitude | 15.00 | ||||
| z magnitude | 15.12 | ||||