Astronomy:HD 102350
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| Distance | 390 ± 8 ly (119 ± 2 pc) |
| Absolute magnitude (MV) | −1.51[6] |
| Details | |
| Radius | 21.96+1.70 −3.27[7] R☉ |
| Luminosity | 282.8±9.0[7] L☉ |
| Temperature | 5,051+424 −185[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- ↑ 1.0 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.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 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: 190–200. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode: 2011MNRAS.410..190T.
- ↑ 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.
- ↑ 5.0 5.1 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.
- ↑ 6.0 6.1 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.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 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.
- ↑ "HD 102350". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+102350.
- ↑ 9.0 9.1 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.
- ↑ 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.
- ↑ Mason, B. D. et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal 122: 3466–3471. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.
- ↑ 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.
- ↑ 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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