Table 1
Coordinates and physical properties of BD + 31°643 (also commonly denoted HD 281159).
| Parameter | Value | Ref. |
|
|
||
| Position (J2000) | RA = 03h44m34.19s | 1 |
| Dec = +32°09′46.14′′ | 1 | |
| Distancea, D | 300 pc | 2 |
| Spectral type and luminosity class | B5 V & B5 V binary | |
| Effective temperature, Teff | 15 400 K | 3 |
| Stellar mass, M∗ | 6.0 ± 1.0 M⊙ | 4 |
| Surface gravity, log g | 3.75 ± 0.05 cm s-2 | 5 |
| Age | 1.3 Myr | 4 |
References. (1) vanLeeuwen (2007); (2) Herbst (2008); (3) Merín (2004); (4) Preibisch & Zinnecker (2001); (5) Montesinos et al. (2009).
Notes.
The distance measured from the mean parallax of IC 348 cluster members is (~260 pc), while the distance derived from the HR diagram is greater (~320 pc) (see Haisch et al. 2001, and references therein).
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