NGC 4490, the Cocoon Galaxy, is a barred spiral galaxy that can be seen interacting with its smaller companion NGC 4485, resulting in it being a starburst galaxy similar to M82. It lies in the constellation Canes Venatici at a distance of 25 million light years from Earth.

This image is a cropped DSS stack of 49 ten-minute frames taken with my QHY247C at default deep sky gain settings on my 11" Edge HD. The image was processed in a back and forth combination of PixInsight and Photoshop.

Image Center:	View full size annotated image.
Right Ascension:	12h 30m 35.817s (187° 38m 57.255s)
Declination:	+41° 39m 7.654s
Orientation:	Up is 180.7 degrees East of North.
Image Size:	17.345' x 14.233'	Pixel Scale:	0.288"

Principal objects in field: NGC 4485, NGC 4490

All identified catalog objects: NGC 4485, NGC 4490, Tycho-2 3020-1461-1, Tycho-2 3020-1525-1