NGC 4490 Cocoon Galaxy
Copyright 2012
Larry Phillips
NGC 4490 interacting spiral galaxies in the constellation Canes Venatici

This pair of galaxies is also known as the "Cocoon Galaxy." Each lobe is actually a spiral galaxy that has been distorted by the other. These galaxies 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.

Distance: 45 million light years
Size: N/A
Camera: SBIG ST-10XME
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: 106 subexposures of 10 minutes each with 38 of red, 34 of green, and 34 of blue for a total of 17 hours & 40 minutes.
Date: March 2012
Software: Camera, mount, and guider control - CCD Commander & MaximDL; calibration, stacking, & RGB creation in CCDStack, and further processing in Photoshop CS5.