Other names: 1309+853, G256-007, G256-7
| Parameter | Unit | Holberg et al. 2016 | Ferrario et al. 2015 | Simbad | |
|---|---|---|---|---|---|
| Right ascension | 13 08 41.06 | ||||
| Declination | 85 02 28.39 | ||||
| Spectral type | DAP9 | DA | DA9P | ||
| Effective temperature | [K] | 5440.0 | 5600.0 | ||
| log(g) | [cgs] | 8.20 | |||
| Mass | [M☉] | 0.71 | 0.5 | ||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | 4.9900 | |||
| 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] | 60.62 | 54.50 | ||
| Distance | [pc] | 16.50 | 18.35 | ||
| Composition | H | ||||
| Proper motion (right ascension) | [mas/yr] | 203.0 | |||
| Proper motion (declination) | [mas/yr] | -249.0 | |||
| Variability | |||||
| Magnetic | yes | yes | |||
| Db | [MG] | 4.9 | 4.9 | ||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 16.76 | ||||
| V magnitude | 15.99 | 16.00 | |||
| R magnitude | 15.90 | ||||
| I magnitude | 14.70 | ||||
| J magnitude | 14.69 | ||||
| H magnitude | 14.46 | ||||
| K magnitude | 14.34 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
* Constant surface field
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour at Université de Montréal. Please send database updates, corrections, suggestions or bug reports to dufourpa@astro.umontreal.ca.