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NCG 5204 is a Magellanic spiral galaxy located about 14.5 million light-years away from Earth[note 1] in the constellation of Ursa Major and is a member of the M101 Group of galaxies.[4][5] It has a galaxy morphological classification of SA(s)m and is highly irregular, with only the barest indication of any spiral arm structure.[3] The galaxy's most prominent feature is an extremely powerful X-ray source designated NGC 5204 X-1. This has resulted in the galaxy being the target of several studies due to the strength of the source and its relative proximity to Earth.[6][clarification needed]
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^P. Fouque; E. Gourgoulhon; P. Chamaraux; G. Paturel (1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members". Astronomy and Astrophysics Supplement. 93: 211–233. Bibcode:1992A&AS...93..211F.
^Vincent Sicotte; Claude Carignan & Daniel Durand (1996). "NGC 5204: A Strongly Warped Magellanic Spiral. I. Light Distribution and HII Kinematics". Astronomical Journal. 112: 1423–1428. Bibcode:1996AJ....112.1423S. doi:10.1086/118110.
^T.P. Roberts; M.R. Goad; M.J.Ward; R.S.Warwick; et al. (2002). "The Nature Of Ultraluminous X-ray Sources In Nearby Galaxies". The Astrophysical Journal. 725 (1): 842–867. arXiv:1009.0525. Bibcode:2010ApJ...725..842L. doi:10.1088/0004-637X/725/1/842. S2CID 119112246.
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most prominent feature is an extremely powerful X-ray source designated NGC5204 X-1. This has resulted in the galaxy being the target of several studies...
globular clusters. M101 has six prominent companion galaxies: NGC5204, NGC 5474, NGC 5477, NGC 5585, UGC 8837 and UGC 9405. As stated above, the gravitational...
two of the lists from the above references) include the irregular galaxies NGC 5238 and UGC 8508. The M51 Group, which includes the Whirlpool Galaxy (M51)...
Small Magellanic Cloud (SMC) NGC 1311 NGC 4618 NGC 4236 NGC 55 NGC 4214 NGC 3109 IC 4710 NGC 4625 NGC 5713 NGC5204NGC 2552 Galaxy morphological classification...
"Optically Identified Supernova Remnants in the Nearby Spiral Galaxies NGC5204, NGC 5585, NGC 6946, M81, and M101". The Astrophysical Journal Supplement Series...
NGC 5364 is a grand design spiral galaxy located 54.5 million light years away in the constellation Virgo. It is inclined to the line of sight from the...
NGC 5247 is a face-on unbarred spiral galaxy located some 60 million light years away in the constellation Virgo. It is a member of the Virgo II Groups...
at an effective temperature of 4,416 K. The spiral galaxy in Ursa Major, NGC 3877 (= H I.201), type Sc, is best found from Chi Ursae Majoris, which is...