NGC 4490 Cocoon Galaxy
Copyright © 2012
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
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.