| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 08 59 24.18162 |
| Declination | −59° 05′ 01.3569″ |
| Apparent magnitude (V) | 5.17 |
| Characteristics | |
| Spectral type | F4V |
| B−V color index | 0.417±0.005 |
| Astrometry | |
| Radial velocity (Rv) | +13.27±0.63 km/s |
| Proper motion (μ) | RA: −175.366 mas/yr Dec.: +281.700 mas/yr |
| Parallax (π) | 38.1808 ± 0.1737 mas |
| Distance | 85.4 ± 0.4 ly (26.2 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.06 |
| Details | |
| Mass | 1.45 M☉ |
| Radius | 1.67+0.05 −0.11 R☉ |
| Luminosity | 4.834+0.28 −0.27 L☉ |
| Surface gravity (log g) | 4.18 cgs |
| Temperature | 6,699±97 K |
| Metallicity | 0.93 dex |
| Rotational velocity (v sin i) | 60.4±3.0 km/s |
| Age | 1.3±0.3 Gyr |
| Other designations | |
| b Car, BD−58°1327, FK5 2570, GC 12449, GJ 333.1, HD 77370, HIP 44143, HR 3598, SAO 236475, CCDM J08594-5905, WDS J08594-5905A | |
| Database references | |
| SIMBAD | data |
HD 77370 is a single star in the constellation Carina. It has the Bayer designation b Carinae; HD 77370 is the identifier from the Henry Draper catalogue. This object has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 5.17. It is located at a distance of 85 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +13 km/s.
This is an ordinary F-type main-sequence star with a stellar classification of F4V. It is around 1.3 billion years old and retains a relatively high projected rotational velocity of 60 km/s. The star has 1.45 times the mass of the Sun and 1.67 times the Sun's radius. It is radiating 4.8 times the luminosity of the Sun from its photosphere at an effective temperature of 6,699 K. The star is the most likely source of the X-ray emission detected at these coordinates.
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ Gray, R. O.; et al. (2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992
- ^ Luck, R. Earle (March 2018), "Abundances in the Local Region. III. Southern F, G, and K Dwarfs", The Astronomical Journal, 155 (3): 31, Bibcode:2018AJ....155..111L, doi:10.3847/1538-3881/aaa9b5, S2CID 125765376, 111.
- ^ Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911, S2CID 8642707
- "HD 77370". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-20.
- Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976
- Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources", The Astrophysical Journal Supplement, 184 (1): 138–151, arXiv:0910.3229, Bibcode:2009ApJS..184..138H, doi:10.1088/0067-0049/184/1/138, S2CID 119267456.
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