羅斯128































































































羅斯128
觀測資料
曆元 J2000

星座
室女座

星官

赤經
 11h 47m 44.3964s[1]

赤緯
 +00° 48′ 16″[1]

視星等（V）
 11.13[2]
特性
光谱分类 M4 V[3]
U−B 色指数 2.685[4]
B−V 色指数 1.59[5]
变星类型 閃焰星
天体测定
径向速度 (Rv) -13[6] km/s
自行 (μ) 赤经：605.66[1]mas/yr
赤纬：-1219.32[1]mas/yr
视差 (π) 299.59 ± 2.20[1]mas
距离 10.89 ± 0.08 ly
(3.34 ± 0.02 pc)
绝对星等 (MV) 13.51[2]
詳細資料

質量 0.15[7]M☉
半徑 0.21[8]R☉
表面重力 (log g) 3.40[7]
亮度 0.00029[來源請求]L☉
溫度 3,180[3]K


其他命名

FI Virginis, FI Vir, GCTP 2730, LHS 315, GJ 447, G 010-050, Vyssotsky（英语：Alexander N. Vyssotsky） 286, LTT 13240, LFT 852, HIP 57548.[1]

羅斯128是一顆紅矮星，是恆星中第11靠近太陽系的恆星系，距離是10.89光年。它在1926年首度被法蘭克·埃爾莫爾·羅斯記錄在星表中[9]。


這是一顆老的銀盤面星，這意味著它是低金屬量星，並且軌道接近銀河的平面[10]。由於它在數分鐘內的週期內光度就會不可預知的顯著增加，因此被分類為一顆活動中的閃焰星[11]。因為閃焰活動的頻率不高，它被認為是一顆被磁化的恆星，也就是有一些證據顯示恆星的星風有一些磁制動使閃焰的頻率降低，但不能確認是否淨效應[12]。


在研究這顆恆星的多個場合的案例中顯示，這顆恆星有一顆伴星是低質量的棕矮星，在距離主星至少1天文單位的軌道上環繞者，但是迄今尚未發現任何伴星[13][14]。這顆恆星也缺乏額外的紅外線輻射，而過量的紅外線輻射通常是有塵埃環在軌道中環繞恆星的指標[15][16]。


羅斯128環繞銀河的軌道與銀河核心的距離從8.22至10.49千秒差距變化，軌道離心率是0.122[17]。這個軌道會使這顆恆星在未來會更接近太陽系，大約在71,000年之後，它與太陽系的距離大約是1.911 ± 0.026秒差距.[18]。



相關條目



  • 恆星距離列表

  • 科幻中的羅斯128（英语：Stars and planetary systems in fiction）




參考資料





  1. ^ 1.01.11.21.31.41.5 Perryman, M. A. C.; 等. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.  引文格式1维护：显式使用等标签 (link)


  2. ^ 2.02.1 The One Hundred Nearest Star Systems. Research Consortium on Nearby Stars. 2009-01-01 [2009-09-03]. （原始内容存档于2012-05-14）. 


  3. ^ 3.03.1 Gautier, T. N.; 等. Far Infrared Properties of M Dwarfs. Bulletin of the American Astronomical Society: 1431. Bibcode:2004AAS...205.5503G.  引文格式1维护：显式使用等标签 (link)


  4. ^ Rufener, F. Second catalogue of stars measured in the Geneva Observatory photometric system. Astronomy & Astrophysics Supplement Series. October 1976, 26: 275–351. Bibcode:1976A&AS...26..275R. 


  5. ^ Warren, W. H., Jr. Photoelectric Photometric Catalogue of Homogeneous Means in the UBV System. Observatory (Geneva). 1978. 


  6. ^ Wilson, Ralph Elmer, General catalogue of stellar radial velocities, Washington: Carnegie Institution of Washington, 1953, Bibcode:1953QB901.W495..... 


  7. ^ 7.07.1 Rodonò, Marcello. The Atmospheres of M Dwarfs: Observations. Washington: NASA. : 409–453. 


  8. ^ White, Stephen M.; Jackson, Peter D.; Kundu, Mukul R. A VLA survey of nearby flare stars. Astrophysical Journal Supplement Series. December 1989, 71: 895–904. doi:10.1086/191401. 


  9. ^ Ross, Frank E. New proper-motion stars, (second list). Astronomical Journal: 124–128. doi:10.1086/104699. 


  10. ^ Sánchez, F. Vazquez, M., 编. New windows to the universe 2. Cambridge University Press. 1990: 313. ISBN 052138429X. 


  11. ^ Kunkel, W. E. Solar neighborhood flare stars - A review. Variable stars and stellar evolution; Proceedings of the Symposium. Moscow, USSR: D. Reidel Publishing Co: 15–46. July 29-August 4, 1974. Bibcode:1975IAUS...67...15K.  请检查|date=中的日期值 (帮助)


  12. ^ Skumanich, Andrew. Some evidence on the evolution of the flare mechanism in dwarf stars. Astrophysical Journal, Part 1. 1986-10-15, 309: 858–863. doi:10.1086/164654.  引文格式1维护：日期与年 (link)


  13. ^ Hinz, Joannah L.; McCarthy, Donald W., Jr.; Simons, Doug A.; Henry, Todd J.; Kirkpatrick, J. Davy; McGuire, Patrick C. A Near-Infrared, Wide-Field, Proper-Motion Search for Brown Dwarfs. The Astronomical Journal. April 2002, 123 (4): 2027–2032. doi:10.1086/339555. 


  14. ^ Schroeder, Daniel J. A Search for Faint Companions to Nearby Stars Using the Wide Field Planetary Camera 2. The Astronomical Journal. 2000, 119: 906–922. doi:10.1086/301227. 


  15. ^ Jura, M.; 等. Mid-Infrared Spectra of Dust Debris around Main-Sequence Stars. The Astrophysical Journal Supplement Series. September 2004, 154 (1): 453–457. doi:10.1086/422975.  引文格式1维护：显式使用等标签 (link)


  16. ^ Gautier, Thomas N., III; 等. Far-Infrared Properties of M Dwarfs. The Astrophysical Journal. September 2007, 667 (1): 527–536. doi:10.1086/520667.  引文格式1维护：显式使用等标签 (link)


  17. ^ Allen, C.; Herrera, M. A. The galactic orbits of nearby UV Ceti stars. Revista Mexicana de Astronomia y Astrofisica. 1998, 34: 37–46 [2008-06-13].  引文使用过时参数coauthors (帮助)


  18. ^ García-Sánchez, J.; Weissman, P. R.; Preston, R. A.; Jones, D. L.; Lestrade, J.-F.; Latham, D. W.; Stefanik, R. P.; Paredes, J. M. Stellar encounters with the solar system. Astronomy and Astrophysics. 2001, 379: 634–659. doi:10.1051/0004-6361:20011330.  引文使用过时参数coauthors (帮助)




外部連結


  • SolStation.com: Ross 128

天球赤道座標：星图11h 47m 44.4s，+00°48′16″







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