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Object Information |
Observing Log
Date of observation: September 11, 1998
Time at end of first CCD image 21:06 PDT
Time at end of last CCD image 21:30 PDT
Observing Location: At home on the drive way
Observation of object:
M27 is a large bright planetary nebula that look like a dumbbell with bright patches.
The southwestern part is brighter than the northeastern part of the nebula
Sky Conditions
Sky transparency:
5.6 - 5.0 (Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Moon rise at 23:06 PDT on September 11, 1998
Astronomical twilight ends in the evening at 21:10 PDT on September 11, 1998
Astronomical twilight starts in morning at 5:00 PDT on September 11, 1998
Observing Equipment
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: 5 - 240 seconds images added together
CCD dark calibration frames: 18 - 240 seconds dark frames
Use Test patterns to calibrate monitor brightness, contrast, height and width