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HR 4102

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(Redirected from HD 90589) Star in the constellation Carina This article is about I Carinae. For i Carinae, see HD 79447. For l Carinae, see HD 84810. For ι Carinae, see Iota Carinae.
HR 4102
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10 24 23.70597
Declination −74° 01′ 53.8036″
Apparent magnitude (V) 3.99
Characteristics
Spectral type F3 V
U−B color index −0.01
B−V color index +0.36
Astrometry
Radial velocity (Rv)−4.7±0.6 km/s
Proper motion (μ) RA: −16.29 mas/yr
Dec.: −27.67 mas/yr
Parallax (π)61.64 ± 0.12 mas
Distance52.9 ± 0.1 ly
(16.22 ± 0.03 pc)
Absolute magnitude (MV)2.94
Details
Mass1.42 M☉
Radius1.592 R☉
Luminosity5.015 L☉
Surface gravity (log g)4.34 cgs
Temperature7,017±239 K
Metallicity +0.02 dex
Rotational velocity (v sin i)51.6 km/s
Age977 Myr
Other designations
I Car, CD−73° 576, GJ 391, HD 90589, HIP 50954, HR 4102, SAO 256710
Database references
SIMBADdata

I Carinae is a single, yellow-white hued star in the southern constellation Carina. It is a fourth 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, and in an estimated 2.7 million years will pass within 24.3 ly (7.46 pc) of the Sun. In the next 7500 years, the south Celestial pole will pass close to this star and Omega Carinae (5800 CE).

Gray et al. (2006) gave this star a stellar classification of F3 V, 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 million years, and is spinning with a projected rotational velocity of 51.6 km/s. The star has 1.4 times the mass of the Sun, 1.6 times its radius, and is radiating 5.56 times the Sun's luminosity from its photosphere at an effective temperature of around 7,017 K. It is a variable star and most likely (99.2% chance) the source of detected X-ray emission coming from these coordinates.

References

  1. ^ van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ 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. ^ 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, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
  4. ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
  5. ^ 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.
  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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
  7. ^ Schofield, Mathew; Chaplin, William J.; Huber, Daniel; Campante, Tiago L.; Davies, Guy R.; Miglio, Andrea; Ball, Warrick H.; Appourchaux, Thierry; Basu, Sarbani; Bedding, Timothy R.; Christensen-Dalsgaard, Jørgen; Creevey, Orlagh; García, Rafael A.; Handberg, Rasmus; Kawaler, Steven D. (2019-03-01), "The Asteroseismic Target List for Solar-like Oscillators Observed in 2 minute Cadence with the Transiting Exoplanet Survey Satellite", The Astrophysical Journal Supplement Series, 241 (1): 12, arXiv:1901.10148, Bibcode:2019ApJS..241...12S, doi:10.3847/1538-4365/ab04f5, ISSN 0067-0049 I Carinae's database entry at VizieR.
  8. ^ 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" (PDF), Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377
  9. "I Car". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-01-15.
  10. 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.
  11. Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics, 575: 13, arXiv:1412.3648, Bibcode:2015A&A...575A..35B, doi:10.1051/0004-6361/201425221, S2CID 59039482, A35.
  12. "Precession".
  13. 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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