15 Sagittarii
| Observation data Epoch J2000 Equinox J2000 | ||
|---|---|---|
| Constellation | Sagittarius | |
| Right ascension | 18h 15m 12.90641s[1] | |
| Declination | −20° 43′ 41.7738″[1] | |
| Apparent magnitude (V) | 5.37[2] | |
| Characteristics | ||
| Spectral type | O9.7 Iab[3] or B0 Iab[4] | |
| B−V color index | 0.007±0.004[5] | |
| Details Rotational velocity (v sin i) 83±7[4] km/s | | |
| Database references | ||
| SIMBAD | data | |
15 Sagittarii is a blue-hued
apparent visual magnitude of 5.37.[2] The system is moving closer to the Sun with a heliocentric radial velocity of around −6 km/s.[6]
Chini et al. (2012) identify this as a double-lined
supergiant star. Along with the O-type star 16 Sgr (HD 167263), it is ionizing an H II region along the western edge of the molecular cloud L291.[11]
The
angular radius.[12]
References
- ^ S2CID 18759600.
- ^ Bibcode:2002yCat.2237....0D.
- ^ S2CID 118847528.
- ^ S2CID 118674151
- S2CID 119257644.
- ^ S2CID 119231169.
- ^ .
- S2CID 118365203, A142.
- ^ "15 Sgr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-15.
- ^ S2CID 119120749
- doi:10.1086/173227
- S2CID 53500788, 15.
