Ursa Major Cluster

Not to be confused with Ursa Major Moving Group.

Short description: Galaxy cluster of the Virgo Supercluster

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The Ursa Major Cluster (Ursa Major I Cluster, UMa I ClG) is a spiral-rich galaxy cluster of the Virgo Supercluster.

Some of its largest members are NGC 3631, NGC 3953, M109 on North (M109 Group) and NGC 3726, NGC 3938, NGC 4051 on South.[1]

The Ursa Major cluster is located at a distance of 18.6 megaparsecs (60 million light-years) and contains about 30% of the light emitted but only 5% of the mass of the nearby Virgo Cluster.[1]

The Ursa Major Cluster is part of the Ursa Major Cloud,[2][3][4] a dense filament of about approximately 580 galaxies,[3][5] that was identified and described in 1987 by astronomer Brent Tully with colleague Richard Fisher in his book The Nearby Galaxies Atlas, as Cloud 12, and contains many other groups of galaxies besides the Ursa Major Cluster.[2] The Ursa Major Cloud is part of a larger fillament, emanating from the Centaurus Cluster through the Virgo Cluster and continues through the Ursa Major Cluster all the way to the Perseus–Pisces Supercluster, that is known as the Virgo Strand or Centaurus–Virgo–PP Filament.[6][7]

## References

1. ↑ 1.0 1.1 "eSky: Ursa Major Cluster". https://www.glyphweb.com/esky/concepts/ursamajorcluster.html.
2. ↑ 2.0 2.1 Tully, R. Brent; Fisher, J. Richard (1987) (in en). Atlas of Nearby Galaxies. Bibcode: 1987ang..book.....T. https://ui.adsabs.harvard.edu/abs/1987ang..book.....T/abstract.
3. ↑ 3.0 3.1 Tully, R. Brent; Verheijen, Marc A. W.; Pierce, Michael J.; Huang, Jia-Sheng; Wainscoat, Richard J. (December 1996). "The Ursa Major Cluster of Galaxies.I.Cluster Definition and Photometric Data" (in en). The Astronomical Journal 112: 2471. doi:10.1086/118196. ISSN 0004-6256. Bibcode: 1996AJ....112.2471T. https://ui.adsabs.harvard.edu/abs/1996AJ....112.2471T/abstract.
4. ↑ Saha, A.; Sandage, Allan; Tammann, G. A.; Dolphin, A. E.; Christensen, J.; Panagia, N.; Macchetto, F. D. (November 2001). "Cepheid Calibration of the Peak Brightness of Type Ia Supernovae. XI. SN 1998aq in NGC 3982" (in en). The Astrophysical Journal 562 (1): 314–336. doi:10.1086/323529. ISSN 0004-637X. Bibcode: 2001ApJ...562..314S. https://ui.adsabs.harvard.edu/abs/2001ApJ...562..314S/abstract.
5. ↑ Castignani, Gianluca; Vulcani, Benedetta; Finn, Rose A.; Combes, Francoise; Jablonka, Pascale; Rudnick, Gregory; Zaritsky, Dennis; Whalen, Kelly et al. (April 2022). "Virgo Filaments. II. Catalog and First Results on the Effect of Filaments on Galaxy Properties" (in en). The Astrophysical Journal Supplement Series 259 (2): 43. doi:10.3847/1538-4365/ac45f7. ISSN 0067-0049. Bibcode: 2022ApJS..259...43C.
6. ↑ Courtois, Hélène M.; Pomarède, Daniel; Tully, R. Brent; Hoffman, Yehuda; Courtois, Denis (September 2013). "Cosmography of the Local Universe" (in en). The Astronomical Journal 146 (3): 69. doi:10.1088/0004-6256/146/3/69. ISSN 0004-6256. Bibcode: 2013AJ....146...69C. https://ui.adsabs.harvard.edu/abs/2013AJ....146...69C/abstract.
7. ↑ Pomarède, Daniel; Hoffman, Yehuda; Courtois, Hélène M.; Tully, R. Brent (August 2017). "The Cosmic V-Web" (in en). The Astrophysical Journal 845 (1): 55. doi:10.3847/1538-4357/aa7f78. ISSN 0004-637X. Bibcode: 2017ApJ...845...55P.

## External links

* The Ursa Major Cluster on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Coordinates:  11h 53m 48.9s, +52° 19′ 36″

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