RA: 20h 32m 24.0s Dec: +47° 21' 00 Mag: 14.5, Size: 2.8' x 2.5', Distance: --ly
RA: 20h 32m 24.0s Dec: +47° 21' 00 Mag: 14.5, Size: 2.8' x 2.5', Distance: --ly
Abell 71 (Pk 85+04.1) is a faint planetary nebula in the constellation Cygnus with a magnitude 18.9 central star. This was originally classified as one of four planetary nebulas in Cygnus by G. Abell in 1955. Studies conducted by P.Pismis, I.Hasse & A.Quintero in 1991 are suggesting this is actually just a region of H-alpha gasses based on narrow band images that show strong H II regions but almost no O III emissions that are characteristic of a planetary nebula. The faint nebulosity surrounding Abell 71 is part of a much larger neighboring nebula complex SH2-115.
| Location & Date |
Backyard, Abbott Observatory - July 1, 27-30, Aug 2-3, 2010 Temperature - Low 70's F |
| Telescope | Deep Sky Instruments RC10C , F/7.3, Losmandy G11 Gemini, Prime Focus, Image scale 0.82 arcsec/pixel |
| Camera |
SBIG ST-2000XM w/CFW8, AO8 Baader LRGB AR Filters CCD temp -15°C |
| Exposure Times | (Ha) 75x10 (R) 9x10 (G) 9x10 (B) 9x10 Minutes, Bin 1x1 |
| Other Information |
Image planning - CCD Navigator Image acquisition/focus/guiding/dither - CCD Autopilot4 w/CCDSoft/TheSky6/PinPoint |
| Image Processing |
* Images Plus 3.75- Calibration, Normalize, Grade, Alignment, Sigma Avg. Combine, Deconvolution, Mild DDP * Adobe CS4 - Ha+RGB combine, Levels, Curves, Sharpening, Cropping, NR, JPEG conversion |
