维基百科
杵一 (危宿)
杵一 （蝎虎座1）是在北天蝎虎座內一顆孤立的[10]恆星。它的視星等為裸眼可見的4.15等[2]。根據依巴谷卫星的測量，這顆恆星的距離為420光年[1]，恆星類型為K3II-III[3]，表明他以演化成巨星。估計它的直徑是太陽的51倍[6]，恆星大氣層的有效溫度是4,350K[7]，使它成為發出橙色色調的K型星 [11]。
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 蝎虎座 |
| 星官 | 杵（危宿） |
| 赤經 | 22h 15m 58.17673s[1] |
| 赤緯 | +37° 44′ 55.4385″[1] |
| 視星等（V） | 4.15[2] |
| 特性 | |
| 光谱分类 | K3II-III[3] |
| U−B 色指数 | +1.70[2] |
| B−V 色指数 | +1.43[2] |
| 天体测定 | |
| 徑向速度 (Rv) | −8.58[4] km/s |
| 自行 (μ) | 赤经：+8.85[1] mas/yr 赤纬：–0.72[1] mas/yr |
| 视差 (π) | 5.25 ± 0.23[1] mas |
| 距离 | 620 ± 30 ly (190 ± 8 pc) |
| 绝对星等 (MV) | −2.61+0.27 −0.24[5] |
| 詳細資料 | |
| 半徑 | 51[6] R☉ |
| 表面重力 (log g) | 1.75[7] |
| 溫度 | 4,350[7] K |
| 金属量 [Fe/H] | −0.12[7] dex |
| 自轉速度 (v sin i) | 10[8] km/s |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | data |
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 2.3 Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV data (SIMBAD), 1986, Bibcode:1986EgUBV........0M.
- ^ 3.0 3.1 Herbig, George H.; Spalding, John F., Jr., Axial Rotation and Line Broadening in Stars of Spectral Types F0-K5, Astrophysical Journal, January 1955, 121: 118, Bibcode:1955ApJ...121..118H, doi:10.1086/145969.
- ^ Famaey, B.; et al, Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters, Astronomy and Astrophysics, 2005, 430: 165–186, Bibcode:2005A&A...430..165F, arXiv:astro-ph/0409579 , doi:10.1051/0004-6361:20041272.
- ^ Carney, Bruce W.; et al, Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars, The Astronomical Journal, March 2008, 135 (3): 892–906, Bibcode:2008AJ....135..892C, arXiv:0711.4984 , doi:10.1088/0004-6256/135/3/892.
- ^ 6.0 6.1 Pasinetti-Fracassini, L. E.; et al, Catalogue of Stellar Diameters (CADARS), Astronomy and Astrophysics, February 2001, 367 (2): 521–524, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289 , doi:10.1051/0004-6361:20000451.
- ^ 7.0 7.1 7.2 7.3 McWilliam, Andrew, High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances, Astrophysical Journal Supplement Series, December 1990, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
- ^ Bernacca, P. L.; Perinotto, M. A catalogue of stellar rotational velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239. Bibcode:1970CoAsi.239....1B.
- ^ 1 Lac -- Variable Star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2016-03-07], （原始内容于2020-11-17）.
- ^ Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, 2008, 389 (2): 869, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- ^ The Colour of Stars, Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004 [2012-01-16], （原始内容存档于March 10, 2012）.