Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  NGC 4485  ·  NGC 4490
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NGC 4490 Cocoon Galaxy, Edward Overstreet
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NGC 4490 Cocoon Galaxy, Edward Overstreet
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Description

NGC 4490 is a late-type SB(s)d in Canes Venatici. It has an apparent magnitude of 9.8 and an apparent diameter of 5.9 arc minutes. Along with NGC 4485, it makes a pair of galaxies often known by the nickname of the "Cocoon Galaxies".Each "cocoon" is actually a spiral galaxy that has been distorted by the other. Hints of spiral structure are still evident in the smaller galaxy. These galaxies have already passed their closest approach (perigalacticon) and are now speeding away from each other. A tail of stars stretches between the galaxies, which are separated by at least 24,000 light years. An incredible number of star-forming regions have developed along the facing sides of each galaxy.Both galaxies are 40 to 50 million light years away. Supernova 2008ax took place in NGC 4490 in 2008.  *SkySafari Pro

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NGC 4490 Cocoon Galaxy, Edward Overstreet