HD 69863
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| A | |
| Right ascension | 08h 15m 15.92267s |
| Declination | −62° 54′ 56.3079″ |
| Apparent magnitude (V) | 5.27 |
| B | |
| Right ascension | 08h 15m 16.47634s |
| Declination | −62° 54′ 54.8724″ |
| Apparent magnitude (V) | 7.62 |
| Characteristics | |
| Evolutionary stage | main sequence + main sequence |
| Spectral type | A2V + F2V |
| B−V color index | 0.086±0.003 |
| Astrometry | |
| Radial velocity (Rv) | 4.0±3.7 km/s |
| Absolute magnitude (MV) | 0.71 |
| A | |
| Proper motion (μ) | RA: −23.542 mas/yr Dec.: −12.414 mas/yr |
| Parallax (π) | 12.7170±0.1895 mas |
| Distance | 256 ± 4 ly (79 ± 1 pc) |
| B | |
| Proper motion (μ) | RA: −20.962 mas/yr Dec.: −14.293 mas/yr |
| Parallax (π) | 12.8292±0.0179 mas |
| Distance | 254.2 ± 0.4 ly (77.9 ± 0.1 pc) |
| Details | |
| A | |
| Mass | 2.10+0.20 −0.17 M☉ |
| Luminosity | 42 L☉ |
| Surface gravity (log g) | 3.90±0.14 cgs |
| Temperature | 8774+601 −210 K |
| Rotational velocity (v sin i) | 191 km/s |
| B | |
| Radius | 1.43+0.12 −0.08 R☉ |
| Luminosity | 3.966±0.016 L☉ |
| Temperature | 6806+203 −258 K |
| Age | 635±88 Myr |
| Other designations | |
| RMK8, C Carinae, CPD−62°985, HD 69863, HIP 40429, HR 3260, CCDM J08153-6255 | |
| A: GC 11275, SAO 250164 | |
| B: GC 11276, SAO 250165 | |
| Database references | |
| SIMBAD | data |
HD 69863 is a binary star system in the southern constellation of Carina. It is visible to the naked eye as a dim point of light with a combined apparent visual magnitude of 5.16. The system is located at a distance of about255 light years from the Sun based on parallax. The dual nature of this system was announced in 1832 by German astronomer Carl Rümker. As of 2015, the pair had an angular separation of 4.10″ along a position angle of 70°.
The brighter primary, designated component A, has a visual magnitude of 5.27 and is an A-type main-sequence star with a stellar classification of A2V. It is 635 million years old and is spinning with a projected rotational velocity of 191 km/s. The star has 2.1 times the mass of the Sun.
The magnitude 7.62 companion, component B, is a F-type main-sequence star with a class of F2V. It is radiating four times the luminosity of the Sun from its photosphere at an effective temperature of 6,806 K. The system is a source for X-ray emission, which is most likely coming from the secondary.