Astronomy:Upsilon3 Eridani

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Short description: Star in the constellation Eridanus


υ3 Eridani
Observation data
Equinox J2000.0]] (ICRS)
Constellation Eridanus
Right ascension  04h 24m 02.21725s[1]
Declination −34° 01′ 00.6542″[1]
Apparent magnitude (V) 3.96[2]
Characteristics
Spectral type K4 III[3]
U−B color index +1.80[2]
B−V color index +1.49[2]
Astrometry
Radial velocity (Rv)+24.1±0.7[4] km/s
Proper motion (μ) RA: +73.77[1] mas/yr
Dec.: +56.70[1] mas/yr
Parallax (π)11.01 ± 0.37[1] mas
Distance296 ± 10 ly
(91 ± 3 pc)
Absolute magnitude (MV)−0.82[5]
Details
Radius54[6] R☉
Luminosity426[7] L☉
Surface gravity (log g)1.71[8] cgs
Temperature3,990[8] K
Metallicity [Fe/H]−0.23[8] dex
Other designations
Beemim, υ3 Eri, d Eri, 43 Eridani, CD−34° 1664, FK5 1121, HD 28028, HIP 20535, HR 1393, SAO 194984.[9]
Database references
SIMBADdata

Upsilon3 Eridani (υ3 Eridani, abbreviated Upsilon3 Eri, υ3 Eri), officially named Beemim /ˈbiːməm/,[10] is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 3.96[2] The distance to this star, based upon an annual parallax shift of 11.01 mas,[1] is around 296 light-years.

This is an evolved K-type giant star with a stellar classification of K4 III.[3] It has about 54[6] times the radius of the Sun and radiates 426[7] times the solar luminosity from its outer atmosphere at an effective temperature of 3,990 K.[8]

Nomenclature

υ3 Eridani (Latinised to Upsilon3 Eridani) is the star's Bayer designation.

This star bore the traditional name Beemim (also rendered Beemin, Theemim and Theemin -- see Theemin).[11][12] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[13] to catalog and standardize proper names for stars. The WGSN approved the name Beemim for this star on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.[10]

In Chinese, 天園 (Tiān Yuán), meaning Celestial Orchard, refers to an asterism consisting of Upsilon3 Eridani, Chi Eridani, Phi Eridani, Kappa Eridani, HD 16754, HD 23319, Theta Eridani, HD 24072, HD 24160, Upsilon4 Eridani, Upsilon2 Eridani and Upsilon1 Eridani.[14] Consequently, the Chinese name for Upsilon3 Eridani itself is 天園十一 (Tiān Yuán shíyī, English: the Eleventh Star of Celestial Orchard).[15]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J. 
  3. ↑ 3.0 3.1 Houk, N. (1982), Michigan Catalogue of Two-dimensional Spectral Types for the HD stars, 3, Bibcode: 1982mcts.book.....H. 
  4. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  5. ↑ 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 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P. 
  7. ↑ 7.0 7.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M. 
  8. ↑ 8.0 8.1 8.2 8.3 Soubiran, C. et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics 515: A111, doi:10.1051/0004-6361/201014247, Bibcode: 2010A&A...515A.111S. 
  9. ↑ "d Eri". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=d+Eri. 
  10. ↑ 10.0 10.1 "Naming Stars". IAU.org. https://www.iau.org/public/themes/naming_stars/. 
  11. ↑ Hough, Carole, ed. (2016), The Oxford Handbook of Names and Naming, Oxford University Press, p. 762, ISBN 978-0191630422, https://books.google.com/books?id=B8LQCwAAQBAJ&pg=PT762. 
  12. ↑ Allen, Richard Hinckley (1963), Star Names, Their Lore and Meaning, Dover Publications Inc, p. 220, ISBN 0486210790, https://archive.org/details/starnamestheirlo00alle/page/220 
  13. ↑ "IAU Working Group on Star Names (WGSN)". https://www.iau.org/science/scientific_bodies/working_groups/280/. 
  14. ↑ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN:978-986-7332-25-7.
  15. ↑ (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 , Hong Kong Space Museum. Accessed on line November 23, 2010.



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