Exposure Data

• Instrument: 4.9" f/3.8 Wright-Newtonian
• F/stop: 3.8
• Exposure: 3 x 10 + 2 x 2 + 1 x 1 minutes
• Camera: Modified Nikon D70 Digital SLR
• Sensitivity: ISO 1600
• Exposure start: 23:54 MEZ
• Date: December 14, 2004
• Location: Ebenwaldhöhe, Lower Austria
• Conditions: Visual limiting magnitude 5.9 mag, seeing 3, temperature -1.5°C, no wind, low humidity
• Autoguider: Meade Pictor 216 XT, max. error: 1
• Enhancement: Adobe Photoshop CS 8.0, SGBNR 1.0.4
• Notes: The short exposures were used to substitute the saturated comet's core of the long shots. Autoguiding on the comet's core worked well. Field size 1°20' x 2°35'; north is up, east to the left.