HD 79447
HD 79447 is a single star in the southern constellation of Carina. It has the Bayer designation i Carinae, while HD 79447 is the identifier from the Henry Draper catalogue. This star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.96. It is located at a distance of approximately 540 light years from the Sun based on parallax, and has an absolute magnitude of −2.14. The star drifting further away with a radial velocity of +18 km/s. It is a candidate member of the Lower Centaurus–Crux group of the Sco OB2 association.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 09h 11m 16.72089s |
| Declination | −62° 19′ 01.1295″ |
| Apparent magnitude (V) | +3.96 |
| Characteristics | |
| Spectral type | B3V |
| B−V color index | −0.180±0.006 |
| Astrometry | |
| Radial velocity (Rv) | +17.5±2.7 km/s |
| Proper motion (μ) | RA: −37.48 mas/yr Dec.: +14.59 mas/yr |
| Parallax (π) | 6.01 ± 0.12 mas |
| Distance | 540 ± 10 ly (166 ± 3 pc) |
| Absolute magnitude (MV) | −2.14 |
| Details | |
| Mass | 7.0±0.1 M☉ |
| Radius | 5.6 R☉ |
| Luminosity | 2,054.17 L☉ |
| Surface gravity (log g) | 3.5±0.1 cgs |
| Temperature | 18,900±500 K |
| Rotational velocity (v sin i) | 0 km/s |
| Age | 39.2±7.0 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is a B-type main-sequence star with a stellar classification of B3V. A surface magnetic field has been detected with a strength on the order of 1 kG. It has an estimated age of around 39 million years with no measured spin rate. The star has about 5.6 times the radius of the Sun and 7 times the Sun's mass. It is radiating over two thousand times the luminosity of the Sun from its photosphere at an effective temperature of 18,900 K.