NGC 281 - The Pacman Nebula in H-alpha
Located approximately 10,000 light-years away in the constellation Cassiopeia and part of the Perseus Spiral Arm, is an H II region known as NGC 281 - The Pacman Nebula, which was named so because of it's resemblance to the 1980s video game character of the same name. Within this region is the open cluster IC1590, the multiple star HD5005, and several Bok globules. E. E. Barnard discovered this nebula in August 1883 and described it as "a large faint nebula, very diffuse." While it's magnitude is unknown, this nebula can be seen in amateur telescopes from dark sky locations. Other designations for this region are IC11 and Sh2-184.
- Telescope: Sky Watcher Quantum 120mm @ f/7
- Accessories: SW Quantum flattener; Dew control by Dew Buster; Alnitak Flat-Man
- Mount: Takahashi EM-200 Temma2
- Camera: QSI583wsg CCD @ -10.0C
- Guiding: Starlight Xpress Lodestar via PHD
- Filters: Astrodon 5nm Ha
- Exposure: 15 x 20min.
- Acquisition: ImagesPlus 4.0c Camera Control
- Processing: Calibration, DDP in Images Plus v4.0; Registration in Registar
- Post-processing: Adobe Photoshop CS5; Noel Carboni’s Actions
- Date(s): August 27 & 29, 2011
- SQM reading (begin - end): N1:18.97 - 19.40; N2:18.77 - 19.14
- Temperature (begin - end): N1:77.5ºF - 72.7ºF; N2:75.6ºF - 71.8ºF
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