CPD−57°2874
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 15m 21.9711s |
| Declination | −57° 51′ 42.713″ |
| Apparent magnitude (V) | +10.08 |
| Characteristics | |
| Spectral type | sgB1[e] |
| U−B color index | +0.30 |
| B−V color index | +1.65 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | −54 km/s |
| Proper motion (μ) | RA: −5.90 mas/yr Dec.: 5.10 mas/yr |
| Distance | 3,440 pc |
| Absolute magnitude (MV) | −7.7 |
| Details | |
| Mass | 17.4–18.6 M☉ |
| Radius | 60 R☉ |
| Luminosity | 500,000 L☉ |
| Temperature | 20,000 K |
| Rotational velocity (v sin i) | 36 ± 4 km/s |
| Other designations | |
| CD–57° 3107, CPD–57°2874, GSC 08608-00427, PPM 769178 | |
| Database references | |
| SIMBAD | data |
CPD−57°2874 is a B[e] supergiant in the constellation Carina. It is a rare star as it is hot but has dust which shows forbidden lines and IR emissions. In 2007 the high spatial and spectral resolution of the star's circumstellar envelope was studied. This was the first time such a study was carried out on a class B[e] supergiant.