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Object Type: Open cluster
Constellation: Cassiopeia
Magnitude: 6.7
Size: 16'

NGC 7789 is bright, rich open cluster that is an impressive object in small and medium-sized telescopes.

Equipment: Meade 14" LX200R/STL-11000M/Astrodon LRGB filters/Paramount ME
F-ratio: f/9.5
Exposures: LRGB: L 8 x 4 minutes, binned 2x2: R 8 x 4 minutes: G 8 x 4 minutes: B 8 x 4 minutes: RGB binned 3x3
Date: December 1, 2007
Location: Landers, California, USA
Technical Notes: Individual exposures were obtained using CCDAutoPilot2 and then sigma combined. The RGB image was created in Registar 1.0. A Gaussian Blur of 0.5 pixel was applied to the RGB image and Unsharp Mask of 1 pixel with a Threshold of 1 was applied to the luminance image.