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Proper Names	Cocoon Galaxy; this galaxy and nearby NGC 4485 are jointly known as the Cocoon Galaxies
Messier Number	None
NGC/IC Number	NGC 4490
Constellation	Canes Venatici
Right Ascension	12h 30m 36s
Declination	+41° 38' 37"
Distance	c. 29,100,000 light years c. 8,910,000 parsecs
Magnitude	Apparent: +9.33 Absolute: -20.42
Diameter	Apparent: 6.7' Actual: 58,700 light years
Hubble Type	SBcd Barred Spiral
Optimum Visibility	April
Notes	The Cocoon Galaxy is part of a pair of interacting galaxies, sometimes referred to collectively as the Cocoon Galaxies. These two galaxies - the primary Cocoon Galaxy and its smaller companion NGC 4485 - have distorted one others' shapes, and because of internal compression, the Cocoon Galaxy shows starburst activity, making it rich with star-forming regions.

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