| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| HD 92449 | |
| Right ascension | 10h39m 18.3925s[1] |
| Declination | −55° 36′ 11.765″[1] |
| Apparent magnitude (V) | 4.29[2] |
| HD 92463 | |
| Right ascension | 10h39m 24.2778s[3] |
| Declination | −55° 36′ 25.642″[3] |
| Characteristics | |
| Spectral type | G5 IIa[4] + B8 V[5] |
| B−V color index | 1.025±0.003[2] |
| Astrometry | |
| HD 92449 | |
| Radial velocity (Rv) | +20.1±0.7[6] km/s |
| Proper motion (μ) | RA: −19.032(91) mas/yr[1] Dec.: 5.032(90) mas/yr[1] |
| Parallax (π) | 4.1595 ± 0.0940 mas[1] |
| Distance | 780 ± 20 ly (240 ± 5 pc) |
| Absolute magnitude (MV) | −2.76[2] |
| HD 92463 | |
| Proper motion (μ) | RA: −18.941(40) mas/yr[3] Dec.: 5.386(42) mas/yr[3] |
| Parallax (π) | 4.2647 ± 0.0405 mas[3] |
| Distance | 765 ± 7 ly (234 ± 2 pc) |
| Details | |
| Luminosity | 1370.29[7] L☉ |
| Temperature | 5,100[7] K |
| Other designations | |
| A: CD−54 3915, HD 92449, HIP 52154, SAO 238309 | |
| B: CD−54 3675, HD 92463, SAO 238313 | |
| Database references | |
| SIMBAD | HD 92449 |
| HD 92463 | |
HR 4180 is a double star with components HD 92449 and HD 92463 in the southern constellationofVela. They are probably members of a binary star system.[8] HR 4180 can be viewed with the naked eye, having an apparent visual magnitude of 4.29.[2] Based upon the annual parallax shift of the two stars it is located approximately 780 light years from the Sun.[1][3] The system is moving further from the Earth with a heliocentric radial velocity of +20 km/s.[6]
The primary component of this system, HD 92449, is a bright giant with a stellar classification of G5 IIa.[4] The star radiates 1,370 times the Sun's luminosity from its photosphere at an effective temperature of 5,100 K.[7] It shares a common proper motion with the magnitude 6.06[9] star HD 92463,[10] and the pair likely form a binary system.[8] This secondary component is a B-type main-sequence star with a class of B8 V.[5] As of 2000, it had an angular separationof51.70″ along a position angle of 105° from the primary.[9]
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