Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Carina |
A | |
Right ascension | 08h 15m 16.42864s[1] |
Declination | −62° 54′ 56.5007″[1] |
Apparent magnitude (V) | 5.27[2] |
B | |
Right ascension | 08h 15m 16.47622s[3] |
Declination | −62° 54′ 54.8700″[3] |
Apparent magnitude (V) | 7.62[2] |
Characteristics | |
Spectral type | A2V[4] + F2V[5] |
B−V color index | 0.086±0.003[6] |
Astrometry | |
Radial velocity (Rv) | 4.0±3.7[6] km/s |
Absolute magnitude (MV) | 0.71[6] |
A | |
Proper motion (μ) | RA: −26.674[1] mas/yr Dec.: -12.060[1] mas/yr |
Parallax (π) | 12.5410 ± 0.1714 mas[1] |
Distance | 260 ± 4 ly (80 ± 1 pc) |
B | |
Proper motion (μ) | RA: −20.911[3] mas/yr Dec.: -14.466[3] mas/yr |
Parallax (π) | 12.7714 ± 0.0329 mas[3] |
Distance | 255.4 ± 0.7 ly (78.3 ± 0.2 pc) |
Details | |
A | |
Mass | 2.10+0.20 −0.17[7] M☉ |
Luminosity | 42[8] L☉ |
Surface gravity (log g) | 3.90±0.14[7] cgs |
Temperature | 8774+601 −210[1] K |
Rotational velocity (v sin i) | 191[9] km/s |
B | |
Radius | 1.43+0.12 −0.08[3] R☉ |
Luminosity | 3.966±0.016[3] L☉ |
Temperature | 6806+203 −258[3] K |
Age | 635±88[7] Myr |
Other designations | |
A: GC 11275, SAO 250164 | |
B: GC 11276, SAO 250165 | |
Database references | |
SIMBAD | data |
HD 69863 is a binary star[11] 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.[6] The system is located at a distance of about255 light years from the Sun based on parallax.[1][3] The dual nature of this system was announced in 1832 by German astronomer Carl Rümker.[12] As of 2015, the pair had an angular separation of 4.10″ along a position angle of 70°.[2]
The brighter primary, designated component A, has a visual magnitude of 5.27[2] and is an A-type main-sequence star with a stellar classification of A2V.[4] It is 635[7] million years old and is spinning with a projected rotational velocity of 191 km/s.[9] The star has 2.1 times the mass of the Sun.[7]
The magnitude 7.62[2] companion, component B, is a F-type main-sequence star with a class of F2V.[5] It is radiating four[3] times the luminosity of the Sun from its photosphere at an effective temperature of 6,806 K.[3] The system is a source for X-ray emission, which is most likely coming from the secondary.[13]