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HD 77370

This article is about b2 Carinae. For b1 Carinae, see V376 Carinae. For B Carinae, see HR 3220.
Not to be confused with β Carinae.
HD 77370
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 08h 59m 24.18162s[1]
Declination −59° 05′ 01.3569″[1]
Apparent magnitude (V) 5.17[2]
Characteristics
Spectral type F4V[3]
B−V color index 0.417±0.005[2]
Astrometry
Radial velocity (Rv)+13.27±0.63[2] km/s
Proper motion (μ) RA: −175.366[1] mas/yr
Dec.: +281.700[1] mas/yr
Parallax (π)38.1808 ± 0.1737 mas[1]
Distance85.4 ± 0.4 ly
(26.2 ± 0.1 pc)
Absolute magnitude (MV)3.06[2]
Details
Mass1.45[4] M☉
Radius1.67+0.05
−0.11[1] R☉
Luminosity4.834+0.28
−0.27[1] L☉
Surface gravity (log g)4.18[4] cgs
Temperature6,699±97[4] K
Metallicity [Fe/H]0.93[4] dex
Rotational velocity (v sin i)60.4±3.0[5] km/s
Age1.3±0.3[2] Gyr
Other designations
b2 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[6]
Database references
SIMBADdata

HD 77370 is a single[7] star in the constellation Carina. It has the Bayer designation b2 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.[2] It is located at a distance of 85 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +13 km/s.[2]

This is an ordinary F-type main-sequence star with a stellar classification of F4V.[3] It is around 1.3[2] billion years old and retains a relatively high projected rotational velocity of 60 km/s.[5] The star has 1.45[4] times the mass of the Sun and 1.67[1] times the Sun's radius. It is radiating 4.8[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,699 K.[4] The star is the most likely source of the X-ray emission detected at these coordinates.[8]

References

  1. ^ a b c d e f g h i j 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.
  2. ^ a b c d e f g h 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.
  3. ^ a b 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
  4. ^ a b c d e f 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.
  5. ^ a b 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
  6. ^ "HD 77370". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-20.
  7. ^ 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
  8. ^ 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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