M101 Pinwheel Galaxy, NGC 5473-4, NGC 5477, NGC 5485-6; Ursa Major 
Astro-Physics 305mm f/3.8 Riccardi-Honders astrograph 
KAF-16803 FLI Proline 
Total Exposure Time: 7.3+ hours; LRGB 260:60:60:60 minutes, RGB binned x 2 
April 2012; Inkom, ID 
Comments: This was a test image after I got my RHA back up and running. The data has been stretched so to bring out the fainter arms of M101; these arms are rarely seen in images of M101. Unfortunately this stretching also brings out the faint sky background noise. However, some of this noise is likely galactic cirrus. I did shoot this region before and demonstrated the faint arms of M101, but that image took over 17 hours to show the arms. This scope showed them in just over 7 hours. The seeing was poor (2-3 arcsec) so galactic core details are somewhat soft. 
Back 
HOME