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觜宿三
鎖定
觜宿三(φ² Ori / 獵户座φ²)是獵户座中的一顆恆星,在天球上與鄰近的觜宿一和觜宿二形成一個小三角
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。這顆恆星肉眼可見,視星等為4.081。
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基於每年27.76 mas 的視差位移
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,可知它距離太陽大約117光年。
觜宿三是一顆 G 型巨星或亞巨星,其恆星光譜為G8 III-IV
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,年齡為69億年,正在脱離主序帶進化。它的質量是太陽的1.07倍,但是已經膨脹到了太陽半徑的7.72倍。這顆恆星外層大氣的有效温度為4856開爾文,其光度為太陽的31.6倍。
[7]
- 參考資料
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- 1. 伊世同.中西對照恆星圖表:科學出版社,1981
- 2. 觜宿三 Khad Posterior | Astrodict | NADC .國家天文學數據中心[引用日期2021-02-26]
- 3. Phi-1 Orionis .stars.astro.illinois.edu[引用日期2023-06-02]
- 4. Cousins, A. W. J. (1984), "Standardization of Broadband Photometry of Equatorial Standards", South African Astronomical Observatory Circulars .NASA/ADS[引用日期2023-06-02]
- 5. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics .NASA/ADS[引用日期2023-06-02]
- 6. Frasca, A. et al. (December 2009), "REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters", Astronomy and Astrophysics .NASA/ADS[引用日期2023-06-02]
- 7. Jofré, E. et al. (2015), "Stellar parameters and chemical abundances of 223 evolved stars with and without planets", Astronomy & Astrophysics .NASA/ADS[引用日期2023-06-02]