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G-type star in the constellation Gemini
Iota Geminorum (ι Geminorum, ι Gem) is a solitary[ 8] star in the constellation Gemini . In the sky, it forms an isosceles triangle with Castor and Pollux , and is located less than a degree from the 5th magnitude stars 64 and 65 Geminorum.[ 9]
Nomenclature
In Chinese , 五諸侯 Wu Zhū Hóu Five Feudal Kings θ Geminorum , τ Geminorum , υ Geminorum and φ Geminorum .[ 10] 五諸侯三 Wu Zhū Hóu sān Template:Lang-en .).[ 11] Propus , meaning "forefoot" in Latin , but this name is now assigned to η Geminorum .[ 12]
Properties
Based upon an annual parallax shift of 27.10 mass ,[ 1] light years from the Sun . This is an evolved red clump [ 13] giant star with a stellar classification of G9 III.[ 3] thin disk population.[ 5] [ 6] mass of the Sun , but has expanded to 10 times the solar radius . It shines with 48[ 4] Sun's luminosity from its outer atmosphere at an effective temperature of 4,753 K.[ 4]
References
^ a b c d e f 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 . ^ a b c Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society 172 (3): 667–679, Bibcode :1975MNRAS.172..667J , doi :10.1093/mnras/172.3.667 ^ a b Morgan, W. W.; Keenan, P. C. (1973), "Spectral Classification", Annual Review of Astronomy and Astrophysics , 11 : 29, Bibcode :1973ARA&A..11...29M , doi :10.1146/annurev.aa.11.090173.000333 . ^ a b c d Massarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity", The Astronomical Journal , 135 (1): 209–231, Bibcode :2008AJ....135..209M , doi :10.1088/0004-6256/135/1/209 ^ a b c Soubiran, C.; et al. (March 2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics , 480 (1): 91–101, arXiv :0712.1370 Bibcode :2008A&A...480...91S , doi :10.1051/0004-6361:20078788 , S2CID 16602121 . ^ a b Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal , 150 (3): 23, arXiv :1507.01466 Bibcode :2015AJ....150...88L , doi :10.1088/0004-6256/150/3/88 , S2CID 118505114 , 88. ^ "iot Gem" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2016-12-04 .{{cite web }}: CS1 maint: postscript (link )^ Eggleton, P. P.; Tokovinin, A. A. (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 . {{citation }}: CS1 maint: unflagged free DOI (link )^ O'Meara, Steve (2007), Herschel 400 Observing Guide Cambridge University Press , p. 76, ISBN 978-0521858939 ^ 陳久金 (2005). 中國星座神話 Chinese horoscope mythology ] (in Chinese). 五南圖書出版股份有限公司. ISBN 978-986-7332-25-7 ^ "研究資源 - 亮星中英對照表" [Bright Star Sino-British comparison table] (in Chinese). 香港太空館. Archived from the original on 2011-01-30. Retrieved 2018-01-08 .^ "Naming stars" . IAU . Retrieved 2018-11-29 .^ Puzeras, E.; et al. (October 2010), "High-resolution spectroscopic study of red clump stars in the Galaxy: iron-group elements", Monthly Notices of the Royal Astronomical Society , 408 (2): 1225–1232, arXiv :1006.3857 Bibcode :2010MNRAS.408.1225P , doi :10.1111/j.1365-2966.2010.17195.x , S2CID 44228180 . {{citation }}: CS1 maint: unflagged free DOI (link )
