Herschel II INDEX -
Date of observation: September 13, 2001
Time at end of first CCD image 10:08 PDT
Time at end of last CCD image 10:49 PDT
Observing location: home observatory
Fastar CCD Imaging session
Seeing: FWHM 3.22358
Transparency: magnitude 13.2 star is a peak value 565.604 with a background of 140.625.
Seeing and transparency is based on Star GSC 3600:216, RA: 21h 06m 22.6s Dec: +50°47'01" (Epoch 2000).
Star is at column 425.947 and row 322.475 in the image.
For Sun set, astronomical twilight end, Moon rise or set, astronomical twilight begin and Sun rise refer to dark sky.
NGC7031 is an open cluster.
Location in image: center
Location RA: 21h 07m 18.0s Dec: +50°50'00" (Epoch 2000)
Image size is 41 arc minutes wide by 31 arc minutes high with an image resolution of 3.8 arc sec per pixel.
Image orientation: north is the top, west is the right, east is the left and south is the bottom.
Additional Information on NGC Objects
SEDS Interactive NGC Catalog Online
Celestron C-8 Schmidt-Cassegrain telescope with Fastar lens accessory and SBIG ST-237 CCD Camera
(8" optical tube, focal length 406mm at f/1.95)
Use Test patterns to calibrate monitor brightness, contrast, height and width
© 1998-2003 David Haworth