NGC 2998是一个位于大熊座棒旋星系中间螺旋星系,质量略小于银河系,距离地球1.95亿光年[5][3][6]。NGC 2998属于NGC 2998星系群。该星系群还包括NGC 3002NGC 3005NGC 3006英语NGC 3006NGC 3008等星系[7][6]

NGC 2998
SDSS拍摄的NGC 2998
观测资料(J2000 历元
星座大熊座
赤经09h 48m 43.630s[1]
赤纬+44° 04′ 52.63″[1]
红移0.01591[2]
径向速度4732 ± 3 km/s[2]
距离195 Mly(59.7 Mpc[3]
视星等 (B)13.3[4]
特征
类型SAB(rs)c[5]
角直径 (V)1.080′ × 0.562′[1]
其他名称
NGC 2998、​UGC 5250、​MCG+07-20-051、​PGC 28196[4][4]
参见:星系星系列表

参见

  1. ^ 1.0 1.1 1.2 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. The Two Micron All Sky Survey (2MASS). The Astronomical Journal. 1 February 2006, 131: 1163–1183 [2022-06-19]. ISSN 0004-6256. doi:10.1086/498708. (原始内容存档于2022-04-02). 
  2. ^ 2.0 2.1 Ahn, C. P.; et al. The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey. The Astrophysical Journal Supplement. 2009, 203 (2): 21. Bibcode:2012ApJS..203...21A. S2CID 20026118. arXiv:1207.7137 . doi:10.1088/0067-0049/203/2/21. 
  3. ^ 3.0 3.1 Tully, R. Brent; Courtois, Hélène M.; Sorce, Jenny G. Cosmicflows-3. The Astronomical Journal. 2016, 152 (2): 21. Bibcode:2016AJ....152...50T. arXiv:1605.01765 . doi:10.3847/0004-6256/152/2/50. 50. 
  4. ^ 4.0 4.1 4.2 NGC 2998. SIMBAD. 斯特拉斯堡天文资料中心. 
  5. ^ 5.0 5.1 NED results for object NGC 2998. NASA/IPAC Extragalactic Database. [5 October 2018]. (原始内容存档于2018-09-19). 
  6. ^ 6.0 6.1 Paudel, Sanjaya; Sengupta, Chandreyee; Yoon, Suk-Jin; Chhatkuli, Daya Nidhi. MCG+07-20-052: Interacting Dwarf Pair in a Group Environment. The Astronomical Journal. 2020, 159 (4): 141. Bibcode:2020AJ....159..141P. S2CID 211258826. arXiv:2002.10076 . doi:10.3847/1538-3881/ab722f. 
  7. ^ NAME NGC 2998 Group. SIMBAD. 斯特拉斯堡天文资料中心. [2021-02-14]. 

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