I decided to image M97 again to see how much more new details could be coaxed with a larger aperture, more sensitive camera, and longer total exposure. A 3nm narrow band Oxygen III filter was also employed to reveal an extremely faint outer bubble surrounding this expanding ball of stellar material located south-east of Merak, one of the two stars in the Big Dipper that point to the North Star. A total exposure time of 12.6 hours was used for this image compared to 3.5 hours for an earlier image taken four years ago.
11h 15' +54d 57'
Date Imaged :
May 6, 2011
Astrodon L:R:G:B:OIII 130:90:90:120:330
Stardust Observatory, Baguio