NGC891

Observing Log
Date of observation: August 25, 2001
Time at end of first CCD image 12:59 PDT
Time at end of last CCD image 3:07 PDT
Observing location: home observatory

Sky Conditions
High clouds moving throught the image
Seeing: FWHM 2.48685 based on Star GSC 2839:926, Magnitude: 14.1, RA: 02h 22m 54.4s Dec: +42°21'49" (Epoch 2000) Star is at column 251.863, row 202.673, FWHM 2.48685, peak value 363.282, background 193.386.
For Sun set, astronomical twilight end, Moon rise or set, astronomical twilight begin and Sun rise refer to dark sky.

Observation of Object
NGC891 is a bright edge on galaxy with a very nice dust lane, magnitude 10.00.
Image size is 31 arc minutes high by 41 arc minutes wide.
Image orientation: North is top, West is right, East is left and South is bottom.

Observing Equipment

Celestron C-8 Schmidt-Cassegrain telescope with Fastar lens accessory and SBIG ST-237 CCD Camera
CCD image time: 87 - 30 seconds images stacked together
No guiding or PEC was used.

Use Test patterns to calibrate monitor brightness, contrast, height and width

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