| Donor | HDE 245770 | Hudec (1975) |
| Other Names | SAO 77348 | |
| Spectral Type | O9.7IIe | Giangarande et al. (1980) |
| Mass | 14(1) Msun | Ikhsanov (2001) |
| Radius | 14 Rsun | Ikhsanov (2001) |
| Luminosity | 1.4x105 Lsun | Giangarande et al. (1980) |
| Teff | 26000 K | de Loore et al. (1984) |
| Rotation | 2.2 d | Ikhsanov (2001) |
| Wind | 1x10-8 Msun/yr | de Loore et al. (1984) |
| Terminal Wind Velocity | 630 km/s | Giovanelli et al. (1990) |
| Magnitude U | 8.91 | Janot-Pacheco et al. (1987) |
| Magnitude B | 9.47 | Janot-Pacheco et al. (1987) |
| Magnitude V | 8.85 | Janot-Pacheco et al. (1987) |
| Magnitude R | 8.38 | Janot-Pacheco et al. (1987) |
| Last modification date: Fri Aug 3 01:06:14 2007 |