NGC 2903

This image is a combination of 2, 3 minute images, SBIG ST-4 CCD.
300mm f/6 newtonian telescope at prime focus.

NGC 2903 is a large and bright galaxy in Leo, about 1.5 degrees south of lambda leonis. It is a multi-armed spiral, tilted at a substancial angle. It is a very good object for small telescopes, appearing as a large oval patch of light in an 8" telescope. In a 10", the spiral structure is visible.

Combination of 10, 3 minute images, SBIG ST8XE CCD.
300mm f/3.5 Tameron lens.

5 minute image, Meade 416XT CCD.
8" f/6 newtonian telescope at prime focus.

Combination of 5, 1 minute images unfiltered,
5, 1 minute images with red and green filters and 6, 1 minute images with a blue filter.
SBIG ST-9E CCD. 8" f/6.3 schmidt-cassegrain telescope at prime focus.

Combination of 5, 5 minute images unfiltered,
3, 5 minute images in red and green filters and 4, 5 minute images with a blue filter.
SBIG ST-9E CCD. 8" f/6.3 schmidt-cassegrain telescope at prime focus.

4, 10 minute images, SBIG ST-9E CCD.
14" f/6.3 schmidt-cassegrain telescope at prime focus.

Combination of 10, 3 minute images.
SBIG ST-9E CCD. 16" f/10 schmidt-cassegrain with an f/6.3 focal reducer.

Combination of 12, 3 minute images, unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.

Combination of 12, 3 minute images unfiltered
and 10, 3 minute images with red, green and blue filters.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.

The galaxy visible to the left (east) is the 15.7 magnitude spiral PGC 27115. This would be an interresting challenge for visual observers.

Combination of 1, 3 minute image with red and green filters and 1 5 minute image with a blue filter.
LN2 cooled, 2k x 2k CCD. 30" f/3.0 cassegrain telescope at prime focus.