玉井三

**波江座β**
	波江座β的位置 (圓圈)
觀測資料; 曆元 J2000.0
星座	波江座
星官	玉井 (參宿)
赤經	05h 07m 50.98549s
赤緯	−05° 05′ 11.2055″
視星等（V）	2.796
特性
光谱分类	A3 III var
U−B 色指数	+0.124
B−V 色指数	+0.110
R−I 色指数	+0.08
天体测定
徑向速度 (Rv)	–3.6 km/s
自行 (μ)	赤经：-82.82 mas/yr ; 赤纬：-75.39 mas/yr
视差 (π)	36.50 ± 0.42 mas
距离	89 ± 1 ly ; (27.4 ± 0.3 pc)
詳細資料
質量	2.6 M☉
半徑	3.55 R☉
表面重力 (log g)	3.58
亮度	52 L☉
溫度	8,104 K
金属量 [Fe/H]	–0.4 dex
自轉速度 (v sin i)	196 km/s
其他命名
	Cursa, Dhalim, Kursa, β Eri, Beta Eridani, Beta Eri, 67 Eridani, 67 Eri, BD−05 1162, CCDM J05079-0506A, FK5 188, GC 6274, GJ 9175, HD 33111, HIP 23875, HR 1666, IDS 05030-0513 A, PPM 187729, SAO 131794, WDS 05078-0505A.
參考資料庫
SIMBAD	资料

玉井三 (波江座β) 是波江座的第二亮星，位於這個星座東北方的邊界，靠近獵戶座之處。它的固有名稱是Cursa^[4]^[11]，視星等2.796^[2]，所以用肉眼就可以直接看見。視差測量出這顆恆星與地球的距離大約是89光年（27秒差距） ^[1]。

性質[编辑]

玉井三 (波江座β)的光譜類型是A3 III ^[3]，其中的III指出在光度分類中是已經耗盡核心的氫，離開主序帶的巨星。外層的有效溫度大約是8,104K^[5]，因此是顆白色色調的A型恆星^[12]。這顆投影自轉速度高達196 km s^–1^[3]，相較於太陽赤道的2 km s^–1，是非常的快速^[13]。這顆恆星的視星等在2.72-2.80^[14] 據報尤其於1985年曾有強勁爆發^[11]^[15]。

這顆星的位置和移動軌跡顯示它是大熊座星群的成員，一個恆星的集團，它們在空間中有著共同的來源和移動方向。但是，它在光度測量上的屬性顯示他可能只是個闖入者^[5]。玉井三有一顆視星等10.90等的光學伴星，角距離為120弧秒，方位角 148°^[16]，在CCDMJ目錄上的編號為 CCDM J05079-0506B.^[17]。

語源[编辑]

Cursa衍生於Al Kursiyy al Jauzah，意思是"中央的椅子 (或"腳凳") "。這個名稱之下的恆星組合還包括玉井一、玉井二和玉井四^[8]。

在中國，這顆恆星稱為玉井三，也就是星官玉井的第三顆星。這個小星群還包括玉井一 (波江座λ)、玉井四 (獵戶座τ)和玉井二 (波江座ψ)^[18]。當然，玉井三 (波江座β)也包含在內^[8]^[19]。依據恆星目錄的技術備忘錄33-507 – 一份包含537顆恆星的精簡目錄，Al Kursiyy al Jauzah含有三顆的標題：波江座β是Cursa，波江座ψ是Al Kursiyy al Jauzah I，波江座λ是Al Kursiyy al Jauzah II (排除了獵戶座τ)^[20]。

参考文献[编辑]

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 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 Cousins, A. W. J., Standardization of Broadband Photometry of Equatorial Standards, South African Astronomical Observatory Circulars, 1984, 8: 59, Bibcode:1984SAAOC...8...59C
^ ^3.0 ^3.1 ^3.2 ^3.3 Royer, F.; et al, Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i, Astronomy and Astrophysics, October 2002, 393: 897–911, Bibcode:2002A&A...393..897R, arXiv:astro-ph/0205255 , doi:10.1051/0004-6361:20020943
^ ^4.0 ^4.1 HR 1666 （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 17, 2008.
^ ^5.0 ^5.1 ^5.2 ^5.3 ^5.4 King, Jeremy R.; et al, Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group, The Astronomical Journal, April 2003, 125 (4): 1980–2017, Bibcode:2003AJ....125.1980K, doi:10.1086/368241
^ ^6.0 ^6.1 ^6.2 Malagnini, M. L.; Morossi, C., Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars, Astronomy and Astrophysics Supplement Series, November 1990, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M
^ Kamp, I.; Hempel, M.; Holweger, H., Do dusty A stars exhibit accretion signatures in their photospheres?, Astronomy and Astrophysics, June 2002, 388: 978–984, Bibcode:2002A&A...388..978K, arXiv:astro-ph/0204449 , doi:10.1051/0004-6361:20020493
^ ^8.0 ^8.1 ^8.2 Allen, R. H., Star Names: Their Lore and Meaning Reprint, New York, NY: Dover Publications Inc: 218, 1963 [2010-12-12], ISBN 0-486-21079-0, （原始内容存档于2023-07-01）
^ Moore, Patrick, The amateur astronomer, Patrick Moore's Practical Astronomy Series 12th, Birkhäuser: 200, 2006, ISBN 1-85233-878-4
^ bet Eri -- Variable Star, SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-01-10], （原始内容存档于2016-03-15）
^ ^11.0 ^11.1 Kaler, James B., Cursa (Beta Eridani), Stars (University of Illinois), [2012-01-10], （原始内容存档于2012-05-02）
^ 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2012-03-10）
^ Unsöld, Albrecht; Baschek, B., The new cosmos: an introduction to astronomy and astrophysics 5th, Springer: 167, 2001, ISBN 3-540-67877-8
^ NSV 1841, database entry, New Catalogue of Suspected Variable Stars, the improved version （页面存档备份，存于互联网档案馆）, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 17, 2008.
^ Brunner, B. H., A Flare of Beta-Eridani, Sky and Telescope, June 1985, 69 (6): 484, Bibcode:1985S&T....69R.484B
^ Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E., The Washington Visual Double Star Catalog (Mason+ 2001-2011), VizieR On-line Data Catalog: B/wds. Originally published in: 2001AJ....122.3466M, November 2011, Bibcode:2011yCat....102026M
^ BD-05 1162B -- Star in double system, database entry, SIMBAD. Accessed on line September 17, 2008.
^ （中文） 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
^ （中文）香港太空館 - 研究資源 - 亮星中英對照表互联网档案馆的存檔，存档日期2009-09-29., Hong Kong Space Museum. Accessed on line November 23, 2010.
^ Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971 (PDF). [2012-12-30]. （原始内容存档 (PDF)于2013-10-29）.

[aaa474_2_653-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 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

[saaoc8_59-2] 2.0 ^2.1 ^2.2 ^2.3 Cousins, A. W. J., Standardization of Broadband Photometry of Equatorial Standards, South African Astronomical Observatory Circulars, 1984, 8: 59, Bibcode:1984SAAOC...8...59C

[aaa393_897-3] 3.0 ^3.1 ^3.2 ^3.3 Royer, F.; et al, Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i, Astronomy and Astrophysics, October 2002, 393: 897–911, Bibcode:2002A&A...393..897R, arXiv:astro-ph/0205255 , doi:10.1051/0004-6361:20020943

[bsc2-4] 4.0 ^4.1 HR 1666 （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 17, 2008.

[aj125_4_1980-5] 5.0 ^5.1 ^5.2 ^5.3 ^5.4 King, Jeremy R.; et al, Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group, The Astronomical Journal, April 2003, 125 (4): 1980–2017, Bibcode:2003AJ....125.1980K, doi:10.1086/368241

[aass85_3_1015-6] 6.0 ^6.1 ^6.2 Malagnini, M. L.; Morossi, C., Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars, Astronomy and Astrophysics Supplement Series, November 1990, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M

[aaa388_978-7] Kamp, I.; Hempel, M.; Holweger, H., Do dusty A stars exhibit accretion signatures in their photospheres?, Astronomy and Astrophysics, June 2002, 388: 978–984, Bibcode:2002A&A...388..978K, arXiv:astro-ph/0204449 , doi:10.1051/0004-6361:20020493

[allen1963-8] 8.0 ^8.1 ^8.2 Allen, R. H., Star Names: Their Lore and Meaning Reprint, New York, NY: Dover Publications Inc: 218, 1963 [2010-12-12], ISBN 0-486-21079-0, （原始内容存档于2023-07-01）

[moore2006-9] Moore, Patrick, The amateur astronomer, Patrick Moore's Practical Astronomy Series 12th, Birkhäuser: 200, 2006, ISBN 1-85233-878-4

[SIMBAD-10] t Eri -- Variable Star, SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-01-10], （原始内容存档于2016-03-15）

[kaler-11] 11.0 ^11.1 Kaler, James B., Cursa (Beta Eridani), Stars (University of Illinois), [2012-01-10], （原始内容存档于2012-05-02）

[csiro-12] 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2012-03-10）

[unsold_baschek2001-13] Unsöld, Albrecht; Baschek, B., The new cosmos: an introduction to astronomy and astrophysics 5th, Springer: 167, 2001, ISBN 3-540-67877-8

[nsv1-14] NSV 1841, database entry, New Catalogue of Suspected Variable Stars, the improved version （页面存档备份，存于互联网档案馆）, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 17, 2008.

[brunner1985-15] Brunner, B. H., A Flare of Beta-Eridani, Sky and Telescope, June 1985, 69 (6): 484, Bibcode:1985S&T....69R.484B

[wvdsc2011-16] Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E., The Washington Visual Double Star Catalog (Mason+ 2001-2011), VizieR On-line Data Catalog: B/wds. Originally published in: 2001AJ....122.3466M, November 2011, Bibcode:2011yCat....102026M

[sb1-17] BD-05 1162B -- Star in double system, database entry, SIMBAD. Accessed on line September 17, 2008.

[18] （中文） 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.

[19] （中文）香港太空館 - 研究資源 - 亮星中英對照表互联网档案馆的存檔，存档日期2009-09-29., Hong Kong Space Museum. Accessed on line November 23, 2010.

[20] Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971 (PDF). [2012-12-30]. （原始内容存档 (PDF)于2013-10-29）.

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觀測資料曆元 J2000.0
波江座β的位置 (圓圈)
星座	波江座
星官	玉井 (參宿)
赤經	05^h 07^m 50.98549^s^[1]
赤緯	−05° 05′ 11.2055″^[1]
視星等（V）	2.796^[2]
特性
光谱分类	A3 III var^[3]
U−B 色指数	+0.124^[2]
B−V 色指数	+0.110^[2]
R−I 色指数	+0.08^[4]
天体测定

徑向速度 (R_v)	–3.6^[5] km/s
自行 (μ)	赤经：-82.82^[1] mas/yr 赤纬：-75.39^[1] mas/yr
视差 (π)	36.50 ± 0.42^[1] mas
距离	89 ± 1 ly (27.4 ± 0.3 pc)

詳細資料

質量	2.6^[6] M_☉
半徑	3.55^[6] R_☉
表面重力 (log g)	3.58^[5]
亮度	52^[6] L_☉
溫度	8,104^[5] K
金属量 [Fe/H]	–0.4^[7] dex
自轉速度 (v sin i)	196^[3] km/s

其他命名
Cursa, Dhalim,^[8] Kursa,^[9] β Eri, Beta Eridani, Beta Eri, 67 Eridani, 67 Eri, BD−05 1162, CCDM J05079-0506A, FK5 188, GC 6274, GJ 9175, HD 33111, HIP 23875, HR 1666, IDS 05030-0513 A, PPM 187729, SAO 131794, WDS 05078-0505A.^[10]
參考資料庫
SIMBAD	资料

性質[编辑]

語源[编辑]

相關條目[编辑]

参考文献[编辑]