|Observation data (J2000 epoch)|
|Right ascension||15h 10m 56.1s|
|Declination||+05° 44′ 41″|
|Redshift||23370 ± 30 km/s|
|Number of stars||100 trillion (1014)|
|Apparent dimensions (V)||1'.2 × 0'.6|
|Apparent magnitude (V)||14.7|
|UGC 9752, PGC 54167|
|See also: Galaxy, List of galaxies|
IC 1101 is a supergiant elliptical galaxy at the center of the Abell 2029 galaxy cluster. It is 1.07 billion light years away in the constellation of Virgo and is classified as a cD class of galaxy. It was discovered on June 19, 1790 by William Herschel.
The galaxy has a diameter of approximately 6 million light years, which makes it currently (as of 2013) the largest known galaxy in terms of breadth. It is the central galaxy of a massive cluster containing a mass (mostly dark matter) of roughly 100 trillion stars. Being more than 50 times the size of the Milky Way and 2000 times as massive, if it were in place of the Milky Way galaxy, it would swallow up the Large Magellanic Cloud, Small Magellanic Cloud, Andromeda Galaxy, and Triangulum Galaxy. IC 1101 owes its size to many collisions of much smaller galaxies about the size of the Milky Way and Andromeda galaxies.
- "NASA/IPAC Extragalactic Database". Results for IC 1101. Retrieved 2006-11-11.
- Clarke, Blanton, & Sarazin, Complex Cooling Core of A2029
- Uson, Juan M.; Boughn, Stephen P.; Kuhn, Jeffrey R. (October 1990). "The central galaxy in Abell 2029 - an old supergiant". Science 250 (4980): 539–540. Bibcode:1990Sci...250..539U. doi:10.1126/science.250.4980.539.
- Darnell, Tony (writer); Davis, Tiffany (Animation) (May 9, 2013). Episode 2: IC 1101: The Largest Galaxy in the Universe. Deep Astronomy (in English). Space Telescope Science Institute. Event occurs at 2:42. Retrieved October 22, 2013.
- Wilford, John Noble (1990-10-26). "Sighting of Largest Galaxy Hints Clues on the Clustering of Matter". New York Times. Retrieved 2010-05-06.
- IC 1101 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- The Scale of the Universe (Astronomy Picture of the Day 2012 March 12)
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