M 101 (NGC 5457) Galaxy in Ursa Major
Located at: RA 14 hours 03 minutes 13 seconds, Dec +54 degrees 20 minutes 55 seconds
Size: 28.9' x 26.9'; Magnitude: 8.3 blue; Class: SAB(rs)cd
North is up
West to the right
| Telescope: |
8" f5 Newtonian reflector |
| Camera: |
ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56 |
| Image: |
Lumicon Red filter, 710 minutes (71 x 10 minute subs), 04/11/12/14/15/2009; seeing 2.6-4.6 FWHM per CCDStack |
| Processing: |
CCDStack 1.6.0.2, Photoshop 7.0 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes: | This image replaces a 360 minute red filtered image from 05/13/14/2007. I tried doubling the exposure with the new Lumicon red filter, but difference was only marginally more successful. This image is smoother, and processed more realistically, than my previous image. However, the doubling of the exposure time only increased the difficulty of dealing with the gradients. Need a real narrow band filter to significantly increase the contrast/details |
