格利澤1

格利澤1（Gliese-Jahreiss 1或GJ 1）是在南半球玉夫座內的一顆紅矮星。它是最靠近太陽的恆星之一，距離大約是14.2光年。但是它的視星等只有8.5等，因為太暗必須借助於望遠鏡才能看見 根據同的資料來源，這顆恆星的分類在M1.5V到M4.0V之間。估計格利澤1的質量是太陽的45–48%，半徑是太陽的46–48%。 這顆恆星被確認是天龍座BY型變星，變星標示為NSV 15017，它也被確認為焰星。像其它的焰星一樣，它輻射出X射線。 使用散斑干涉儀觀察這顆恆星的近紅外線光譜，被解釋為有一顆伴星在軌道上環繞著。但是，在距離主星1天文單位的距離內沒有發現比10.5等亮的天體，在10天文單位以內沒有比12.5等亮的天體。徑向速度的測量也未能查出存在軌道上環繞著的伴星。這些觀測排除了在適居帶內有數個地球質量的行星，在1天文單位或更近的軌道距離內也沒有木星質量的行星。精確度達到20m/s的徑向速度的測量顯示很小，甚至沒有變化。 這顆恆星的空間速度分量分別是：U = +77.2，V = -99.5，和W = -35.6 km/s.。它以離心率0.45的軌道環繞銀河系，與銀河核心的距離變化從3,510到9,150秒差距。相比之下，太陽目前與銀河核心的距離是8,500秒差距。具有高本動速度的恆星被稱為速逃星。這顆恆星的本動速度達到111.38公里/秒，並且這顆星的速度向量可與杜鵑-時鐘和/或劍魚座AB星協相聯結。 由於它的赤經位置非常接近曆元1950.0分點的原點，因此在格利澤近星星表和魯坦星表都是第一顆恆星。 恆星距離列表 Perryman, M. A. C.; et al. 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) NSV 15017 -- Flare Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2006-06-12]. （原始内容存档于2019-06-05）.  Cousins, A. W. J. UBV Photometry of Some Southern Stars（Third List）. Monthly Notes Astronomical Society of South Africa. 1973, 32 (2): 43–48.  General Catalogue of Variable Stars NSV 15017. Centre de Données astronomiques de Strasbourg. [2009-12-14]. （原始内容存档于2018-10-03）.  Wilson, R. E. General Catalogue of Stellar Radial Velocities. Carnegie Institute of Washington D.C. 1953. Bibcode:1953GCRV..C......0W.  使用|accessdate=需要含有|url= (帮助) Schmitt JHMM, Liefke C. NEXXUS: A comprehensive ROSAT survey of coronal X-ray emission among nearby solar-like stars. Astron Astrophys. April 2004, 417: 651–65.  Zechmeister, M.; Kürster, M.; Endl, M. The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs. arXiv. August 6, 2009. arXiv:0908.0944 .  缺少或|url=为空 (帮助); 使用|accessdate=需要含有|url= (帮助) The One Hundred Nearest Star Systems. RECONS. Georgia State University. 2009-01-01 [2009-09-08]. （原始内容存档于2012-05-14）.  Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. Catalogue of Apparent Diameters and Absolute Radii of Stars（CADARS）-Third edition - Comments and statistics. Astronomy and Astrophysics. February 2001, 367: 521–524. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.  Note: Search the VizieR catalogue II/224 （页面存档备份，存于互联网档案馆） for HD 225213. Gautier, Thomas N., III; et al. Far-Infrared Properties of M Dwarfs. The Astrophysical Journal. September 2007, 667 (1): 527–536. Bibcode:2007ApJ...667..527G. doi:10.1086/520667.  引文使用过时参数coauthors (帮助) 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.  Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun. Monthly Notices of the Royal Astronomical Society. January 2011, 410 (1): 190–200. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.  M1.5: SIMBAD. M3: Gautier, Thomas N., III; et al (2007). M3: Schmitt, J. H. M. M.; et al (2004). M4: Eggen, Olin J. (1996) M4: Pasinetti-Fracassini, L. E.; et al (2001). Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition. Astronomy and Astrophysics Supplement. November 1999, 139: 555–558. Bibcode:1999A&AS..139..555G. doi:10.1051/aas:1999407.  Schmitt JHMM, Fleming TA, Giampapa MS. The X-ray view of the low-mass stars in the solar neighborhood. Ap J. September 1995, 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149.  Leinert, C.; Henry, T.; Glindemann, A.; McCarthy, D. W., Jr. A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry. Astronomy and Astrophysics. September 1997, 325: 159–166. Bibcode:1997A&A...325..159L.  Zechmeister, M.; Kürster, M.; Endl, M. The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs. Astronomy and Astrophysics. October 2009, 505 (2): 859–871. Bibcode:2009A&A...505..859Z. arXiv:0908.0944 . doi:10.1051/0004-6361/200912479.  Eggen, Olin J. Distribution and Corrlation of Age, Abundance, and Motion of Lower Main Sequence Stars. Astronomical Journal. January 1996, 111: 466–475. Bibcode:1996AJ....111..466E. doi:10.1086/117797.  Allen, Christine; Santillan, Alfredo. An improved model of the galactic mass distribution for orbit computations. Revista Mexicana de Astronomia y Astrofisica. October 1991, 22: 255–263. Bibcode:1991RMxAA..22..255A.  Gliese, W. Catalogue of Nearby Stars. Veröffentlichungen des Astronomischen Rechen-Instituts Heidelberg. 1969. Bibcode:1969VeARI..22....1G.  Luyten, W. J. LHS (Luyten half-second) Catalogue.. Minneapolis, Minnesota: University of Minnesota. 1976 [2009-09-09]. （原始内容存档于2019-06-10）.