夹白二

**夹白二**
	夹白二的位置 (红圈处)
观测资料; 历元 J2000.0
星座	网罟座
星官	夹白(近南极星区)
赤经	04h 14m 25.48414s
赤纬	−62° 28′ 25.8917″
视星等（V）	3.315
特性
光谱分类	G8 II-III
U−B 色指数	+0.63
B−V 色指数	+0.922
R−I 色指数	+0.659
天体测定
径向速度 (Rv)	+35.5 km/s
自行 (μ)	赤经：+41.97 mas/yr ; 赤纬：+49.42 mas/yr
视差 (π)	20.18 ± 0.10 mas
距离	161.6 ± 0.8 ly ; (49.6 ± 0.2 pc)
绝对星等 (MV)	−0.17 ± 0.05
详细资料
质量	3.11 ± 0.06 M☉
半径	12.8 ± 0.6 R☉
表面重力 (log g)	2.69 ± 0.04
亮度	240 L☉
温度	5,196 K
金属量 [Fe/H]	0.07 dex
自转速度 (v sin i)	5.7 km/s
年龄	0.33 ± 0.02 Gyr
其他命名
	α Ret, Alpha Reticuli, Alpha Ret, CCDM J04144-6228, CPD−62 332, FK5 156, GC 5164, HD 27256, HIP 19780, HR 1336, IDS 04131-6243, PPM 353975, SAO 248969, WDS 04144-6228A.
参考资料库
SIMBAD	资料

夹白二 (网罟座α)是南天星座网罟座的一颗恒星^[7]，其视星等为3.3^[2] 。

命名

在中国, 它属于近南极星区的星官夹白 (Jiá Bái), 意思是夹着白色的云，白色的云指的是麦哲伦云，它包含两颗恒星，分别是夹白一(剑鱼座θ)和夹白二(网罟座α)。^[11]

参考文献

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 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 Gutierrez-Moreno, Adelina; et al, A System of photometric standards 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, 1966, Bibcode:1966PDAUC...1....1G
^ Houk, Nancy, Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1975mcts.book.....H
^ HR 1336 （页面存档备份，存于互联网档案馆）, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 （页面存档备份，存于互联网档案馆）. Accessed on line September 4, 2008.
^ Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, The Revision of the General Catalogue of Radial Velocities, University of Toronto: International Astronomical Union, June 20–24, 1966 [2009-09-10], （原始内容存档于2019-06-26） |booktitle=被忽略 (帮助)
^ ^6.0 ^6.1 ^6.2 ^6.3 ^6.4 ^6.5 ^6.6 da Silva, L.; et al, Basic physical parameters of a selected sample of evolved stars, Astronomy and Astrophysics, November 2006, 458 (2): 609–623, Bibcode:2006A&A...458..609D, arXiv:astro-ph/0608160  , doi:10.1051/0004-6361:20065105
^ ^7.0 ^7.1 Alpha Ret （页面存档备份，存于互联网档案馆）, Jim Kaler, Stars. Accessed on line September 4, 2008.
^ Schröder, C.; Reiners, A.; Schmitt, J. H. M. M., Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo, Astronomy and Astrophysics, January 2009, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377
^ * alf Ret -- Star in double system, database entry, SIMBAD. Accessed on line September 4, 2008.
^ Entry 04144-6228, The Washington Double Star Catalog （页面存档备份，存于互联网档案馆）, United States Naval Observatory. Accessed on line September 4, 2008.
^ （中文） AEEA (Activities of Exhibition and Education in Astronomy) 天文教育资讯网 2006 年 7 月 27 日（页面存档备份，存于互联网档案馆）

[aaa474_2_653-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752  , doi:10.1051/0004-6361:20078357

[sps1966-2] 2.0 ^2.1 ^2.2 ^2.3 Gutierrez-Moreno, Adelina; et al, A System of photometric standards 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, 1966, Bibcode:1966PDAUC...1....1G

[houk1978-3] Houk, Nancy, Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1975mcts.book.....H

[bsc1-4] HR 1336 （页面存档备份，存于互联网档案馆）, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 （页面存档备份，存于互联网档案馆）. Accessed on line September 4, 2008.

[rgcrv-5] Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, The Revision of the General Catalogue of Radial Velocities, University of Toronto: International Astronomical Union, June 20–24, 1966 [2009-09-10], （原始内容存档于2019-06-26） |booktitle=被忽略 (帮助)

[aaa458_2_609-6] 6.0 ^6.1 ^6.2 ^6.3 ^6.4 ^6.5 ^6.6 da Silva, L.; et al, Basic physical parameters of a selected sample of evolved stars, Astronomy and Astrophysics, November 2006, 458 (2): 609–623, Bibcode:2006A&A...458..609D, arXiv:astro-ph/0608160  , doi:10.1051/0004-6361:20065105

[kaler-7] 7.0 ^7.1 Alpha Ret （页面存档备份，存于互联网档案馆）, Jim Kaler, Stars. Accessed on line September 4, 2008.

[aaa493_3_1099-8] Schröder, C.; Reiners, A.; Schmitt, J. H. M. M., Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo, Astronomy and Astrophysics, January 2009, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377

[sb0-9] * alf Ret -- Star in double system, database entry, SIMBAD. Accessed on line September 4, 2008.

[wds-10] Entry 04144-6228, The Washington Double Star Catalog （页面存档备份，存于互联网档案馆）, United States Naval Observatory. Accessed on line September 4, 2008.

[11] （中文） AEEA (Activities of Exhibition and Education in Astronomy) 天文教育资讯网 2006 年 7 月 27 日（页面存档备份，存于互联网档案馆）

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[11]

观测资料历元 J2000.0
夹白二的位置 (红圈处)
星座	网罟座
星官	夹白(近南极星区)
赤经	04^h 14^m 25.48414^s^[1]
赤纬	−62° 28′ 25.8917″^[1]
视星等（V）	3.315^[2]
特性
光谱分类	G8 II-III^[3]
U−B 色指数	+0.63^[4]
B−V 色指数	+0.922^[2]
R−I 色指数	+0.659^[2]
天体测定

径向速度 (R_v)	+35.5^[5] km/s
自行 (μ)	赤经：+41.97^[1] mas/yr 赤纬：+49.42^[1] mas/yr
视差 (π)	20.18 ± 0.10^[1] mas
距离	161.6 ± 0.8 ly (49.6 ± 0.2 pc)
绝对星等 (M_V)	−0.17 ± 0.05^[6]

详细资料

质量	3.11 ± 0.06^[6] M_☉
半径	12.8 ± 0.6^[6] R_☉
表面重力 (log g)	2.69 ± 0.04^[6]
亮度	240^[7] L_☉
温度	5,196^[6] K
金属量 [Fe/H]	0.07^[6] dex
自转速度 (v sin i)	5.7^[8] km/s
年龄	0.33 ± 0.02^[6] Gyr

其他命名
α Ret, Alpha Reticuli, Alpha Ret, CCDM J04144-6228, CPD−62 332, FK5 156, GC 5164, HD 27256, HIP 19780, HR 1336, IDS 04131-6243, PPM 353975, SAO 248969, WDS 04144-6228A.^[9]^[10]
参考资料库
SIMBAD	资料