Abell 81
Abell 81 - Planetary Nebula in Cepheus (IC 1454, PK 117+18 1, ARO 376)
Full scale crop: 1568x941 pixels | 1920x1200 pixels (upscaled)
| Image Type: | Narrowband HDR | Constellation: | Cepheus |
| Telescope: | 10" Aries f/15 Maksutov-Cassegrain on Astro-Physics 900GTO German Equatorial | Object: | Planetary Nebula |
| Focal Length: | 2642mm | Distance: | |
| Resolution: | 0.53"/pixel at full size | Dimensions: | 30" - 37.8" (various sources), 38.16" estimated on this image |
| Accessories: | Moravian G1-0300 as Off-Axis Guider, 0.67X Astro-Physics CCD Telecompressor | Magnitude: | 14.8 (B), 14.0 (V) |
| CCD: | QSI 532wsg, running at -20 deg. C | ||
| Exposures: | H-alpha (G): 2x30 min, O-III (B): 2x30 min, S-II (R): 2x30 min. Total: 3 hours |  Aries MCT in Malvazinky Observatory |
|
| Filter(s): | Astrodon 3nm H-alpha, O-III and S-II | ||
| Exposure Date: | 21 April 2011 | ||
| Location: | Malvazinky Observatory in Prague, Czech Republic | ||
| Seeing, FWHM: | 2" | ||
| Processing Software: | MaximDL, CCDStack, PixInsight, Photoshop | ||
| Image Acquisition Software: | MaximDL, TheSky6, CCDAutoPilot, FocusMax, PinPoint | ||
| Remarks: | Central star not visible (filters too faint, poor conditions: transparency 1/5 during the session.) |
||