柳宿增四

**柳宿增四**
观测资料; 历元 J2000.0
星座	巨蟹座
星官
赤经	08h 55m 55.54693s
赤纬	+11° 37′ 33.6990″
视星等（V）	+5.44
特性
演化阶段	巨星
光谱分类	K5 III
B−V 色指数	1.462±0.004
天体测定
径向速度 (Rv)	+25.38±0.16 km/s
自行 (μ)	赤经：−15.443 mas/yr ; 赤纬：−13.539 mas/yr
视差 (π)	3.8596 ± 0.1340 mas
距离	850 ± 30 ly ; (259 ± 9 pc)
详细资料
质量	1.42±0.45 M☉
半径	54 R☉
表面重力 (log g)	1.28±0.11
亮度	669.87 L☉
温度	4,150±92 K
金属量 [Fe/H]	−0.01±0.05 dex
年龄	1.15+0.67; −0.43 Gyr
其他命名
	60 Cnc、NSV 4308、BD+12°1941、GC 12339、HD 76351、HIP 43851、HR 3550、SAO 98235
参考数据库
SIMBAD	资料

柳宿增四或巨蟹座60（英语：60 Cancri，缩写60 Cnc），又称柳宿增十二，是巨蟹座中的一颗恒星，距太阳约850光年。它是一颗微弱的橙色恒星，肉眼可见，视星等为+5.44。^[2]柳宿增四位于黄道附近，因此偶尔会被月球掩食。^[7]它正在以+25公里/秒的日心径向速度远离地球。^[1]

这是一颗老化的巨星，恒星分类为K5 III，^[3]表明它已经耗尽了核心的氢并从主序星演化出来。它是一颗未知类型的疑似变星。^[8]经过周边昏暗校正后，干涉测量术测量的主要成分角直径为1.94±0.02 mas，^[9]在其估计距离处，相当于太阳半径约54倍的物理半径。^[6]它的年龄约为11.5亿年，质量是太阳的1.4倍。^[5]这颗恒星在4,150 K的有效温度下，其扩大的光球层辐射出的光度是太阳的670倍。^[2]^[5]

参考资料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365  . doi:10.1051/0004-6361/201833051. VizieR中此天体在盖亚望远镜第二批数据发布的记录
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 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 Adams, Walter S.; et al, The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars, Astrophysical Journal, April 1935, 81: 187, Bibcode:1935ApJ....81..187A, doi:10.1086/143628  .
^ ^4.0 ^4.1 60 Cnc. SIMBAD. 斯特拉斯堡天文资料中心.
^ ^5.0 ^5.1 ^5.2 Feuillet, Diane K.; et al, Determining Ages of APOGEE Giants with Known Distances, The Astrophysical Journal, 2016, 817 (1): 40, Bibcode:2016ApJ...817...40F, S2CID 118675933, arXiv:1511.04088  , doi:10.3847/0004-637X/817/1/40.
^ ^6.0 ^6.1 Lang, Kenneth R., Astrophysical formulae, Astronomy and astrophysics library 1 3rd, Birkhäuser, 2006 [2023-09-16], ISBN 3-540-29692-1, （原始内容存档于2023-07-28）. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(10^{-3}\cdot 259.1\cdot 1.94)\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 108\cdot R_{\bigodot }\end{aligned}}$
^ White, Nathaniel M.; Feierman, Barry H., A Catalog of Stellar Angular Diameters Measured by Lunar Occultation, Astronomical Journal, September 1987, 94: 751, Bibcode:1987AJ.....94..751W, doi:10.1086/114513.
^ Samus N. N.; et al, General Catalogue of Variable Stars, Astronomy Reports, 5.1, 2017, 61 (1): 80–88, Bibcode:2017ARep...61...80S, S2CID 125853869, doi:10.1134/S1063772917010085.
^ Richichi, A.; et al, CHARM2: An updated Catalog of High Angular Resolution Measurements, Astronomy and Astrophysics, February 2005, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039

[GaiaDR2-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365  . doi:10.1051/0004-6361/201833051. VizieR中此天体在盖亚望远镜第二批数据发布的记录

[Anderson2012-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 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.

[Adams1935-3] 3.0 ^3.1 Adams, Walter S.; et al, The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars, Astrophysical Journal, April 1935, 81: 187, Bibcode:1935ApJ....81..187A, doi:10.1086/143628  .

[SIMBAD-4] 4.0 ^4.1 60 Cnc. SIMBAD. 斯特拉斯堡天文资料中心.

[Feuillet2016-5] 5.0 ^5.1 ^5.2 Feuillet, Diane K.; et al, Determining Ages of APOGEE Giants with Known Distances, The Astrophysical Journal, 2016, 817 (1): 40, Bibcode:2016ApJ...817...40F, S2CID 118675933, arXiv:1511.04088  , doi:10.3847/0004-637X/817/1/40.

[lang2006-6] 6.0 ^6.1 Lang, Kenneth R., Astrophysical formulae, Astronomy and astrophysics library 1 3rd, Birkhäuser, 2006 [2023-09-16], ISBN 3-540-29692-1, （原始内容存档于2023-07-28）. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(10^{-3}\cdot 259.1\cdot 1.94)\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 108\cdot R_{\bigodot }\end{aligned}}$

[White1987-7] White, Nathaniel M.; Feierman, Barry H., A Catalog of Stellar Angular Diameters Measured by Lunar Occultation, Astronomical Journal, September 1987, 94: 751, Bibcode:1987AJ.....94..751W, doi:10.1086/114513.

[Samus2017-8] Samus N. N.; et al, General Catalogue of Variable Stars, Astronomy Reports, 5.1, 2017, 61 (1): 80–88, Bibcode:2017ARep...61...80S, S2CID 125853869, doi:10.1134/S1063772917010085.

[Richichi2005-9] Richichi, A.; et al, CHARM2: An updated Catalog of High Angular Resolution Measurements, Astronomy and Astrophysics, February 2005, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039 

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观测资料历元 J2000.0
星座	巨蟹座
星官
赤经	08^h 55^m 55.54693^s^[1]
赤纬	+11° 37′ 33.6990″^[1]
视星等（V）	+5.44^[2]
特性
演化阶段	巨星
光谱分类	K5 III^[3]^[2]^[4]
B−V 色指数	7000146200000000000♠1.462±0.004^[2]
天体测定

径向速度 (R_v)	7001253800000000000♠+25.38±0.16^[1] km/s
自行 (μ)	赤经：−15.443^[1] mas/yr 赤纬：−13.539^[1] mas/yr
视差 (π)	3.8596 ± 0.1340^[1] mas
距离	850 ± 30 ly (259 ± 9 pc)

详细资料 ^{^[5]}

质量	7000142000000000000♠1.42±0.45 M_☉
半径	54^[6] R_☉
表面重力 (log g)	7000128000000000000♠1.28±0.11
亮度	669.87^[2] L_☉
温度	7003415000000000000♠4,150±92 K
金属量 [Fe/H]	3001900000000000000♠−0.01±0.05 dex
年龄	7000114999999999999♠1.15+0.67 −0.43 Gyr

其他命名
60 Cnc、NSV 4308、BD+12°1941、GC 12339、HD 76351、HIP 43851、HR 3550、SAO 98235^[4]
参考数据库
SIMBAD	资料