水位增十一

**水位增十一**
觀測資料; 曆元 J2000
星座	巨蟹座
星官
赤經	08h 08m 42.4457s
赤緯	+13° 38′ 27.307″
視星等（V）	6.25
特性
光谱分类	F3 V
B−V 色指数	0.480±0.007
天体测定
徑向速度 (Rv)	−10.0±4.3 km/s
自行 (μ)	赤经：+2.776 mas/yr ; 赤纬：−14,723 mas/yr
视差 (π)	12.7085 ± 0.1327 mas
距离	257 ± 3 ly ; (78.7 ± 0.8 pc)
绝对星等 (MV)	1.59
詳細資料
質量	1.16 M☉
表面重力 (log g)	3.60±0.14
亮度	17.94 L☉
溫度	6,357±88 K
金属量 [Fe/H]	0.04 dex
自轉速度 (v sin i)	52.3±4.1 km/s
年齡	2.466 Gyr
其他命名
	12 Cnc、BD+14°1831、HD 67483、HIP 39874、HR 3184、SAO 97594
參考資料庫
SIMBAD	资料

水位增十一或巨蟹座12（英语：12 Cancri，缩写12 Cnc）是黄道十二宫巨蟹座中的一颗恒星。它的视星等为 6.25，^[2]略低于在良好视宁条件下肉眼可见恒星的正常极限。从地球轨道观察，这颗恒星的年视差变化为 12.7 mas，距离地球约 257 光年。它以大约-10公里/秒的径向速度向太阳移动。^[4]

这是一颗普通的F型主序星，恒星分类为F3 V，^[3]这表明它的核心通过氢聚变产生能量。它以52^[5]公里/秒的预计旋转速度自转，似乎正在经历类似太阳的差异自转，相对速率α=0.33±0.13。^[9]这颗恒星的年龄约为25亿岁，^[6]质量是太阳的1.16倍，^[6]其光球层辐射的光度几乎是太阳的18倍，^[2]有效温度约为6,357 K。^[7]

参考资料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 . 已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR.
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 , doi:10.1134/S1063773712050015.
^ ^3.0 ^3.1 Balachandran, Suchitra, Lithium depletion and rotation in main-sequence stars, Astrophysical Journal, Part 1, May 1, 1990, 354: 310–332, Bibcode:1990ApJ...354..310B, doi:10.1086/168691.
^ ^4.0 ^4.1 de Bruijne, J. H. J.; Eilers, A.-C., Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project, Astronomy & Astrophysics, October 2012, 546: 14, Bibcode:2012A&A...546A..61D, S2CID 59451347, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.
^ ^5.0 ^5.1 ^5.2 Ammler-von Eiff, Matthias; Reiners, Ansgar, New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?, Astronomy & Astrophysics, June 2012, 542: A116, Bibcode:2012A&A...542A.116A, S2CID 53666672, arXiv:1204.2459 , doi:10.1051/0004-6361/201118724.
^ ^6.0 ^6.1 ^6.2 ^6.3 ^6.4 David, Trevor J.; Hillenbrand, Lynne A., The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets, The Astrophysical Journal, 2015, 804 (2): 146, Bibcode:2015ApJ...804..146D, S2CID 33401607, arXiv:1501.03154 , doi:10.1088/0004-637X/804/2/146.
^ ^7.0 ^7.1 ^7.2 Casagrande, L.; et al, New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey, Astronomy and Astrophysics, June 2011, 530: A138, Bibcode:2011A&A...530A.138C, S2CID 56118016, arXiv:1103.4651 , doi:10.1051/0004-6361/201016276.
^ 12 Cnc. SIMBAD. 斯特拉斯堡天文資料中心.
^ Reiners, Ansgar; Schmitt, Jürgen H. M. M., Differential rotation in rapidly rotating F-stars, Astronomy and Astrophysics, December 2003, 412 (3): 813−819, Bibcode:2003A&A...412..813R, S2CID 16900202, arXiv:astro-ph/0309616 , doi:10.1051/0004-6361:20034255.

[dr3-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 . 已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR.

[Anderson2012-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 , doi:10.1134/S1063773712050015.

[Balachandran1990-3] 3.0 ^3.1 Balachandran, Suchitra, Lithium depletion and rotation in main-sequence stars, Astrophysical Journal, Part 1, May 1, 1990, 354: 310–332, Bibcode:1990ApJ...354..310B, doi:10.1086/168691.

[deBruijne2012-4] 4.0 ^4.1 de Bruijne, J. H. J.; Eilers, A.-C., Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project, Astronomy & Astrophysics, October 2012, 546: 14, Bibcode:2012A&A...546A..61D, S2CID 59451347, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.

[vonEiff2012-5] 5.0 ^5.1 ^5.2 Ammler-von Eiff, Matthias; Reiners, Ansgar, New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?, Astronomy & Astrophysics, June 2012, 542: A116, Bibcode:2012A&A...542A.116A, S2CID 53666672, arXiv:1204.2459 , doi:10.1051/0004-6361/201118724.

[David2015-6] 6.0 ^6.1 ^6.2 ^6.3 ^6.4 David, Trevor J.; Hillenbrand, Lynne A., The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets, The Astrophysical Journal, 2015, 804 (2): 146, Bibcode:2015ApJ...804..146D, S2CID 33401607, arXiv:1501.03154 , doi:10.1088/0004-637X/804/2/146.

[Casagrande2011-7] 7.0 ^7.1 ^7.2 Casagrande, L.; et al, New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey, Astronomy and Astrophysics, June 2011, 530: A138, Bibcode:2011A&A...530A.138C, S2CID 56118016, arXiv:1103.4651 , doi:10.1051/0004-6361/201016276.

[SIMBAD-8] 12 Cnc. SIMBAD. 斯特拉斯堡天文資料中心.

[Reiners2003-9] Reiners, Ansgar; Schmitt, Jürgen H. M. M., Differential rotation in rapidly rotating F-stars, Astronomy and Astrophysics, December 2003, 412 (3): 813−819, Bibcode:2003A&A...412..813R, S2CID 16900202, arXiv:astro-ph/0309616 , doi:10.1051/0004-6361:20034255.

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水位增十一

参考资料

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