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Object Information |
Observing Log
Date of observation: February 20, 1999
Time at end of first CCD image 02:48 PST
Time at end of last CCD image 02:58 PST
Observing Location: At home on the drive way
Observation of object:
M3 is a large bright and round globular cluster with
some stars resolved to half way to center and it has a
bright round core. M3 is wider and has more outlying stars than
M2.
Sky Conditions
Sky transparency: 5.5
(Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Moon set at 22:02 PST on February 19, 1999
Astronomical twilight ends in the evening at 19:22 PST on February 19, 1999
Astronomical twilight starts in morning at 5:24 PST on February 20, 1999
Observing Equipment
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: 5 - 120 seconds images added together
CCD dark calibration frames: 16 - 120 seconds dark frames
Use Test patterns to calibrate monitor brightness, contrast, height and width