AstroGallery

PK 47+42.1

PK 47+42.1

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Object Notes:
  • Constellation: Hercules
  • Location: RA: 16h 27m 30.0s Dec: +27d 54' 00" Epoch 2000
  • Size: 174 x 174 arc-seconds
  • Magnitude: 12.9
  • Type: Planetary Nebula
  • AKA: Abell 39
Instrument: Ritchey-Chretien 32" Telescope
Focal Ratio: f7.2 (prime focus)
Camera: SBIG STL-11000 CCD camera
(See product review in July, 2004 issue of Sky & Telescope magazine.)
with Astrodon Tru-Balance color filters.
Exposure: 36 x 5 minutes Luminance unbinned
7 x 5 minutes each R/G/B, all unbinned
Guiding: Off-Axis with STV Autoguider (Santa Barbara Instrument Group)
(See product review in May, 2003 issue of Astronomy magazine.)
See Photo/Guiding Equipment.
Date: 7/06/05, 7/09/05, 7/10/05
Post Processing: CCDSoft, CCDSharp, MaxIM DL, Photoshop CS

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