格利泽393

格利泽393或GJ 393，是位於六分儀座一顆紅矮星。視星等為9.65，肉眼無法看到它。據視差，這顆恆星距離太陽22.9光年，並且正以+8.3公里/秒的徑向速度離太陽更遠。它有一個很大的自行，以每年6994460572997054060♠0.950″的速度穿越天球。這顆恆星相對於太陽的淨速度為 32.9 公里/秒。它與劍魚座AB移動星群的成員具有相似的空間運動，但被認為是隨機闖入者。 GJ 393的恆星分類為M2V，表明這是一顆通過核心氫聚變產生能量的小型紅矮星。它自轉緩慢，似乎在色球上不活躍，表明它是一顆較老的恆星；可能有100億年的歷史了。這顆恆星的質量是太陽的43%，半徑是太陽的44.6%。金屬量低於太陽。在3,579 K的有效溫度下，它的光球層僅為太陽光度的2.7%。 2019年，視向速度法探測到一顆候選行星。它被歸類為一顆熱的超級地球，軌道周期為7天，半長軸為0.055天文單位。數據中發現的較長周期信號被解釋為恆星活動。 2021年，這顆行星在三個不同的數據集中獨立檢測後被確認為真實存在。 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 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  Schweitzer, A.; et al. The CARMENES search for exoplanets around M dwarfs. Different roads to radii and masses of the target stars. Astronomy & Astrophysics. May 2019, 625: 16. Bibcode:2019A&A...625A..68S. S2CID 102351979. arXiv:1904.03231 . doi:10.1051/0004-6361/201834965. A68.  Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. Schaefer, G. H.; et al, AB Dor Moving Group Stars Resolved with the CHARA Array, The Astrophysical Journal, May 2018, 858 (2): 14, Bibcode:2018ApJ...858...71S, S2CID 48362791, doi:10.3847/1538-4357/aaba71, 71  GJ 393. SIMBAD. 斯特拉斯堡天文資料中心.  Winters, Jennifer G.; et al. The Solar Neighborhood. XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc. The Astronomical Journal. June 2019, 157 (6): 32. Bibcode:2019AJ....157..216W. S2CID 86859146. arXiv:1901.06364 . doi:10.3847/1538-3881/ab05dc. 216.  Sinnott, Roger W.; Perryman, Michael A. C. Millennium Star Atlas 2. Sky Publishing Corporation and the European Space Agency. 1997: 779. ISBN 0-933346-83-2.  Lépine, Sébastien; Shara, Michael M. A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog). The Astronomical Journal. March 2005, 129 (3): 1483–1522. Bibcode:2005AJ....129.1483L. S2CID 2603568. arXiv:astro-ph/0412070 . doi:10.1086/427854.  Barnes, J. R.; et al. Frequency of planets orbiting M dwarfs in the Solar neighbourhood. 2019-06-11. arXiv:1906.04644  [astro-ph.EP] （英语）.  Amado, Pedro J.; Bauer, Florian F.; Rodríguez López, Cristina; Rodríguez, Eloy; Cardona Guillén, C.; Perger, M.; Caballero, José A.; López-González, Maria J.; Muñoz Rodríguez, I.; Pozuelos, F. J.; Sánchez-Rivero, A.; Schlecker, M.; Quirrenbach, Andreas; Ribas, Ignasi; Reiners, Ansgar; Almenara, J.; Astudillo-Defru, N.; Azzaro, M.; Béjar, Victor J. S.; Bohemann, R.; Bonfils, X.; Bouchy, F.; Cifuentes, C.; Cortés-Contreras, M.; Delfosse, Xavier; Dreizler, Stefan; Forveille, Thierry; Hatzes, Artie P.; Henning, Thomas K.; Jeffers, Sandra V.; Kaminski, Adrian; Kürster, Martin; Lafarga, M.; Lodieu, Nicolas; Lovis, C.; Mayor, M.; Montes, David; Morales, Juan Carlos; Morales, Nicolás; Murgas, F.; Ortiz, José L.; Pepe, F.; Perdelwitz, V.; Pollaco, D.; Santos, N. C.; Schöfer, P.; Schweitzer, A.; Ségransan, N. C.; Shan, Y.; Stock, S.; Tal-Or, Lev; Udry, S.; Zapatero-Osorio, María Rosa; Zechmeister, Mathias. The CARMENES search for exoplanets around M dwarfs. Astronomy & Astrophysics. 2021-05-28, 650: A188. S2CID 235248027. arXiv:2105.13785 . doi:10.1051/0004-6361/202140633.