MetaGuide: NGC 6946
- Optics: Celestron C11 at f/5.7
- Mount: Celestron CGE
- Polar alignment: Single AllStar align with low southern star
- Guiding software: MetaGuide ASCOM
- Guiding details - guiding in both Ra and Dec based on video centroid with 1s period
- Camera: Starlight Xpress SXVF-H9
- Filter: LRGB
- Guiding Camera: Lumenera SKYnyx 2-0M @ 8 fps
- Guiding mode: Off-axis guiding with Taurus mini tracker
- Image Details: L: 9x10m RGB 2x10m
- 0.83" per pixel
- Raw FWHM: approx <2.0"
- Image Processing: ImagesPlus, flats, bias, dark used for hot pixel removal, but no dark subtract. No Photoshop
- Date and Location: August 15, 2009. Hudson Valley, NY.
Luminance only
Close up of stars in single 10m luminance sub-exposure showing 0.8" pixels. The stars are small enough that it is hard to estimate the fwhm, but it is somewhere between 1 and 2". This is a single calibrated frame that has only been linearly stretched with no processing or sharpening.
Questions, comments, and feedback contact Frank Freestar8n at the spam encoded address, freestar8n aatt yahoo ddoott com