MESSIER INDEX - NGC INDEX - NAME INDEX
Date of observation: September 11, 1998
Time at end of first CCD image 21:55 PDT
Time at end of last CCD image 22:13 PDT
Observing Location: At home on the drive way
Observation of object: M13 is a extermely large bright and round globular cluster with some stars resolved to the center and it has a bright round core.
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
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
Notes: Off center to the east because of a bright star to the east that causes star blooming.
Use Test patterns to calibrate monitor brightness, contrast, height and width
© 1998-2003 David Haworth