MESSIER INDEX - NGC INDEX - NAME INDEX
Date September 20, 1998
Time at end of first CCD image 21:33 PDT
Time at end of last CCD image 21:47 PDT
Observing Location: At home on the drive way
Observation of object: M16 is an large irregular shape diffuse nebula with large dark patches and rifts. The small dark rift in the center of the nebula looks like an eagle in images with more magnification.
Sky transparency: 5.2 (Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Notes: Image taken over Portland, Oregon, U.S.A. sky glow.
Moon sets at 19:28 PDT on September 20, 1998
Astronomical twilight ends in the evening at 20:51 PDT on September 20, 1998
Astronomical twilight starts in morning at 5:11 PDT on September 21, 1998
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: 4 - 240 seconds images added together
CCD dark calibration frames: 24 - 240 seconds dark frames
Use Test patterns to calibrate monitor brightness, contrast, height and width
© 1998-2003 David Haworth