M101

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Imaging Equipment:

• Telescope: Celestron C-11 at f/7.15
• Zeiss II German Equatorial Mount
• Santa Barbara Instrument Group ST-8E NABG CCD camera (1530 x 1020 pixels, 9 x 9mm, monochromatic, 16 bit, 13.8 x 9.2mm array)
• CWF8 color filter wheel with IR-blocking clear, red, green and blue dichroic filters

Exposure Information:

• Date: Friday, April 12, 2002
• Location: Mt. Pinos, CA
• Elevation: 8300', OAT +40F
• Composition: LRGB
• L:R:G:B = 160:40:40:60 minutes. Total exposure time: 300 minutes
• All subexposures were 10 minutes each
• Raw FWHM: 4.0 arc seconds
• Plate scale: 0.93 arc-sec/pixel

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