NGC 4651. Note the umbrella-shaped stream.
|Observation data (J2000 epoch)|
|Right ascension||12h 43m 42.6s|
|Declination||+16° 23′ 36″|
|Redshift||788 ± 2 km/s|
|Apparent magnitude (V)||11.39|
|Apparent size (V)||4′.0 × 2′.6|
|UGC 7901, PGC 42833|
NGC 4651 is a spiral galaxy located in the constellation of Coma Berenices that can be seen with amateur telescopes, at a distance not well determined that ranges from 35 million light years to 72 million light years
This member of the Virgo Cluster, located on its outskirts, is known as the Umbrella Galaxy due to the umbrella-shaped structure that extends from its disk to the east and that it is composed of stellar streams, being the remmants of a much smaller galaxy that has been torn apart by NGC 4651's tidal forces, something that explains why NGC 4651 has been included on Halton Arp's Atlas of Peculiar Galaxies as Arp 189 -galaxy with filaments-.
Studies using radiotelescopes of the distribution of its neutral hydrogen show distortions on NGC 4651's outer regions and a gas clump associated with a dwarf galaxy that may have born in the event that produced the mentioned stellar streams
- "NASA/IPAC Extragalactic Database". Results for NGC 4651. Retrieved 2012-08-04.
- Nemiroff, R.; Bonnell, J., eds. (15 April 2010). "NGC 4651: The Umbrella Galaxy". Astronomy Picture of the Day. NASA. Retrieved 2012-08-04.
- Solanes, J. M.; Sanchis, T.; Salvador-Solé, E.; Giovanelli, R.; Haynes, M. P. (2002). "The Three-dimensional Structure of the Virgo Cluster Region from Tully-Fisher and H I Data". The Astronomical Journal. 124 (5): 2440–2452. Bibcode:2002AJ....124.2440S. arXiv: . doi:10.1086/344074.
- Koopmann, R.; Kenney, J. D. P. (2004). "Hα Morphologies and Environmental Effects in Virgo Cluster Spiral Galaxies". The Astrophysical Journal. 613 (2): 866–885. Bibcode:2004ApJ...613..866K. arXiv: . doi:10.1086/423191.
- "Stellar Tidal Streams in Spiral Galaxies of the Local Volume". Retrieved 2012-07-21.
- Chung, A.; Van Gorkom, J.H.; Kenney, J.F.P.; Crowl, Hugh; Vollmer, B. (2009). "VLA Imaging of Virgo Spirals in Atomic Gas (VIVA). I. The Atlas and the H I Properties". The Astronomical Journal. 138 (6): 1741–1816. Bibcode:2009AJ....138.1741C. doi:10.1088/0004-6256/138/6/1741.