HD 102350
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 11h 46m 30.82257s[1]
Declination −61° 10′ 42.2364″[1]
Apparent magnitude (V) 4.11[2]
Characteristics
Spectral type G0II[3] or G5Ib/II[4]
B−V color index 0.895±0.008[2]
Variable type suspected δ Cep[5]
Astrometry
Radial velocity (Rv)−3.4±0.7[2] km/s
Proper motion (μ) RA: −21.87±0.16[1] mas/yr
Dec.: −16.41±0.15[1] mas/yr
Parallax (π)8.37 ± 0.17 mas[1]
Distance390 ± 8 ly
(119 ± 2 pc)
Absolute magnitude (MV)−1.51[6]
Details
Radius21.96+1.70
−3.27[7] R☉
Luminosity282.8±9.0[7] L☉
Temperature5,051+424
−185[7] K
Other designations
NSV 5325, CD−60°3741, FK5 443, HD 102350, HIP 57439, HR 4522, SAO 251579, WDS J11465-6111A[8]
Database references
SIMBADdata

HD 102350 is a single[9] star in the constellation Centaurus. It has a yellow hue and is visible to the naked eye with an apparent visual magnitude of 4.11.[2] The distance to this star is approximately 390 light years based on parallax, but it is drifting closer with a radial velocity of −3 km/s.[2] It has an absolute magnitude of −1.51.[6]

This is an aging bright giant star with a stellar classification of G0II.[3] It is a candidate Cepheid variable,[5] but Hipparcos photometry found its brightness to be constant.[10] The star has expanded to 22[7] times the radius of the Sun and is radiating 283[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,051 K.[7] It has a magnitude 13.0 visual companion at an angular separation of 24.3″ along a position angle of 313° relative to the brighter component, as of 2000.[11]

HD 102350 is listed in the Washington Double Star Catalog as having a 13th magnitude companion about 25″ away,[12] but it is a distant background object unrelated to HD 102350.[13][9]

References

  1. ^ a b c d e 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. ^ a b c d e 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 Tetzlaff, N.; et al. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
  4. ^ Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  5. ^ a b Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  6. ^ a b Cardini, D. (January 2005). "Mg II chromospheric radiative loss rates in cool active and quiet stars". Astronomy and Astrophysics. 430: 303–311. arXiv:astro-ph/0409683. Bibcode:2005A&A...430..303C. doi:10.1051/0004-6361:20041440. S2CID 12136256.
  7. ^ a b c d e f 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.
  8. ^ "HD 102350". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
  9. ^ a b 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.
  10. ^ Adelman, S. J. (2001). "Research Note Hipparcos photometry: The least variable stars". Astronomy and Astrophysics. 367: 297–298. Bibcode:2001A&A...367..297A. doi:10.1051/0004-6361:20000567.
  11. ^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122: 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
  12. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
  13. ^ 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.
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