Astronomy:HR 4102

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Short description: Star in the constellation Carina
HR 4102
Observation data
Equinox J2000.0]] (ICRS)
Constellation Carina
Right ascension  10h 24m 23.70597s[1]
Declination −74° 01′ 53.8036″[1]
Apparent magnitude (V) 3.99[2]
Characteristics
Spectral type F3 V[3]
U−B color index −0.01[2]
B−V color index +0.36[2]
Astrometry
Radial velocity (Rv)−4.7±0.6[4] km/s
Proper motion (μ) RA: −16.29[1] mas/yr
Dec.: −27.67[1] mas/yr
Parallax (π)61.64 ± 0.12[1] mas
Distance52.9 ± 0.1 ly
(16.22 ± 0.03 pc)
Absolute magnitude (MV)2.94[5]
Details
Mass1.42[6] M☉
Luminosity5.56[5] L☉
Surface gravity (log g)4.34[6] cgs
Temperature7,017±239[6] K
Metallicity [Fe/H]+0.02[3] dex
Rotational velocity (v sin i)51.6[7] km/s
Age977[6] Myr
Other designations
I Car, CD−73° 576, GJ 391, HD 90589, HIP 50954, HR 4102, SAO 256710[8]
Database references
SIMBADdata

I Carinae is a single,[9] yellow-white hued star in the southern constellation Carina. It is a fourth[2] magnitude star that is visible to the naked eye. An annual parallax shift of 61.64 mas provides a distance estimate of 62 light years. It is moving closer with a radial velocity of −5 km/s,[4] and in an estimated 2.7 million years will pass within 24.3 ly (7.46 pc) of the Sun.[10] In the next 7500 years, the south Celestial pole will pass close to this star and Omega Carinae (5800 CE).[11]

Gray et al. (2006) gave this star a stellar classification of F3 V,[3] indicating it is an F-type main-sequence star that is generating energy through hydrogen fusion at its core. It is younger than the Sun with an estimated age of 977[6] million years, and is spinning with a projected rotational velocity of 51.6 km/s.[7] The star has 1.4[6] times the mass of the Sun and is radiating 5.56[5] times the Sun's luminosity from its photosphere at an effective temperature of around 7,017 K.[6] It is a variable star and most likely (99.2% chance) the source of detected X-ray emission coming from these coordinates.[12]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 Cousins, A. W. J.; Stoy, R. H. (1962), "Photoelectric magnitudes and colours of Southern stars.", Royal Observatory Bulletin 64: 103, Bibcode: 1962RGOB...64..103C. 
  3. ↑ 3.0 3.1 3.2 Gray, R. O. et al. (July 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, doi:10.1086/504637, Bibcode: 2006AJ....132..161G. 
  4. ↑ 4.0 4.1 Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G. 
  5. ↑ 5.0 5.1 5.2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D. 
  7. ↑ 7.0 7.1 Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo", Astronomy and Astrophysics 493 (3): 1099–1107, doi:10.1051/0004-6361:200810377, Bibcode: 2009A&A...493.1099S, http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 [yes|permanent dead link|dead link}}]
  8. ↑ "I Car". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=I+Car. 
  9. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  10. ↑ Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics 575: 13, doi:10.1051/0004-6361/201425221, A35, Bibcode: 2015A&A...575A..35B. 
  11. ↑ "Precession". http://moonkmft.co.uk/Precession.html. 
  12. ↑ 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, doi:10.1088/0067-0049/184/1/138, Bibcode: 2009ApJS..184..138H. 

Coordinates: Sky map 10h 24m 23.7s, −74° 01′ 54″



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