HR 3220
From Infogalactic: the planetary knowledge core
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Carina |
| Right ascension | 08h 09m 00.67584s[1] |
| Declination | −61° 18′ 08.7391″[1] |
| Apparent magnitude (V) | 4.75[2] |
| Characteristics | |
| Spectral type | F6VFe-0.8CH-0.4[3] |
| U−B color index | −0.05[2] |
| B−V color index | +0.44[2] |
| Astrometry | |
| Radial velocity (Rv) | +23.7[4] km/s |
| Proper motion (μ) | RA: −150.05[1] mas/yr Dec.: −296.87[1] mas/yr |
| Parallax (π) | 50.05 ± 2.65[1] mas |
| Distance | 65 ± 3 ly (20 ± 1 pc) |
| Details | |
| Mass | 1.35[5] M☉ |
| Surface gravity (log g) | 4.12[5] cgs |
| Temperature | 6,365[5] K |
| Metallicity [Fe/H] | −0.27[5] dex |
| Rotational velocity (v sin i) | 8.8[6] km/s |
| Age | 10[5] Gyr |
| Other designations | |
HR 3220 (B Car) is a single-lined spectroscopic binary in the constellation Carina, approximately 65 light years from Earth. The primary is a F-type main sequence star with an apparent magnitude of +4.75. The secondary is most likely a helium white dwarf with 0.47 times the mass of the Sun. Mass transfer from the white dwarf progenitor has given the primary the spectral signature of a blue straggler that appears much younger than its actual age of about 10 billion years.[5]
References
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- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Lua error in package.lua at line 80: module 'strict' not found.
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