Sharpless 2-129, The Bigfoot Nebula
HaRGB VERSION: Red enhanced by addition of about 20% Hydrogren alpha data.
(click on image for larger size & full resolution - about 12Mb):
Image acquisition and processing details:
| Telescope: | Takahashi Epsilon 180, f/2.8. |
| Mount: | Astro-Physics AP1200 German Equatorial Mount. |
| Camera: | SBIG STL-11000M cooled to -25C, external guiding with SBIG e-Finder and ST-402ME cooled to -20C. All images binned 1x1. |
| Filters, Exposure Times: | HaRGB image total = 17hr 40min. AstroDon Red 120 min (12x10min), Green 120 min (12x10min), Blue 100 min (10x10min). Also 3nm narrowband filter: Ha 720 min (36x20 min). Additional data was obtained but discarded. |
| Dates: | Various 04/10/10-04/15/10. |
| Moon Phase: | Various. |
| Location: | Xanadu West backyard roll-off roof observatory, in Tucson, AZ. |
| Software: | CCD Commander, MaximDL, PinPoint, TheSky, FocusMax, CCDInspector, CCDStack, Adobe Photoshop CS4, Noel Carboni's Astronomy Tools. |
| Notes: | Hydrogen Alpha data was used to enhance the contrast between the nebula and background sky. It was mixed into the red channel, and a very small amount into the blue channel. (Note that Hydrogen alpha is in the red range of human vision, and Hydrogen beta would fall into the blue range at a much weaker level). |