Astronomy:HD 102350

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Short description: Star in the constellation Centaurus
HD 102350
Observation data
Equinox J2000.0]] (ICRS)
Constellation Centaurus[1]
Right ascension  11h 46m 30.82257s[2]
Declination −61° 10′ 42.2364″[2]
Apparent magnitude (V) 4.11[3]
Characteristics
Spectral type G0II[4] or G5Ib/II[5]
B−V color index 0.895±0.008[3]
Variable type suspected δ Cep[6]
Astrometry
Radial velocity (Rv)−3.4±0.7[3] km/s
Proper motion (μ) RA: −21.87±0.16[2] mas/yr
Dec.: −16.41±0.15[2] mas/yr
Parallax (π)8.37 ± 0.17[2] mas
Distance390 ± 8 ly
(119 ± 2 pc)
Absolute magnitude (MV)−1.51[7]
Details
Radius21.96+1.70
−3.27[8] R☉
Luminosity282.8±9.0[8] L☉
Temperature5,051+424
−185[8] K
Other designations
NSV 5325, CD−60°3741, FK5 443, HD 102350, HIP 57439, HR 4522, SAO 251579, WDS J11465-6111A[9]
Database references
SIMBADdata

HD 102350 is a single[10] 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.[3] 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.[3] It has an absolute magnitude of −1.51.[7]

This is an aging bright giant star with a stellar classification of G0II.[4] It is a candidate Cepheid variable,[6] but Hipparcos photometry found its brightness to be constant.[11] The star has expanded to 22[8] times the radius of the Sun and is radiating 283[8] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,051 K.[8] 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.[12]

HD 102350 is listed in the Washington Double Star Catalog as having a 13th magnitude companion about 25″ away,[13] but it is a distant background object unrelated to HD 102350.[14][10]

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R  Constellation record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 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. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  4. ↑ 4.0 4.1 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 (1): 190–200. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode: 2011MNRAS.410..190T. 
  5. ↑ Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H. 
  6. ↑ 6.0 6.1 Samus, N. N. et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1 61 (1): 80–88. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S. 
  7. ↑ 7.0 7.1 Cardini, D. (January 2005). "Mg II chromospheric radiative loss rates in cool active and quiet stars". Astronomy and Astrophysics 430: 303–311. doi:10.1051/0004-6361:20041440. Bibcode: 2005A&A...430..303C. 
  8. ↑ 8.0 8.1 8.2 8.3 8.4 8.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  9. ↑ "HD 102350". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+102350. 
  10. ↑ 10.0 10.1 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. 
  11. ↑ Adelman, S. J. (2001). "Research Note Hipparcos photometry: The least variable stars". Astronomy and Astrophysics 367: 297–298. doi:10.1051/0004-6361:20000567. Bibcode: 2001A&A...367..297A. 
  12. ↑ Mason, B. D. et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. 
  13. ↑ 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. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. 
  14. ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.



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