45 minutes exposure Kodak Elite 200 film, and a 5" f/5 refractor at prime focus.
| Object Type | Galaxy Sc |
| Constellation | Triangulum |
| Magnitude | 5.5 |
| Size | 30.0' x 42.0' |
M33 is a very large and bright galaxy in Triangulum. It is easily visible in binoculars and can be seen with the naked eye if the skies are very dark. One of the larger members of the local group, M33 is a multi-armed spiral, tilted nearly to face-on. Situated at a distance of about 2.4 million light years, it is often considered to be the most distant object visible to the naked eye. Generally this is the case, however observers with very good eyesight and under very dark skies, have reported sighting M81(northern hemisphere) and NGC 5128 (southern hemisphere) with the naked eye.
M33 can be a difficult object for small telescopes, as the surface brightness is very low. However if low magnification is used, little difficulty should be encountered in observing it. With larger telescopes, several of the star clusters and nebulae can be seen, with many of them having seperate NGC numbers.
1 minute exposure, SBIG ST-9E CCD camera.
14" f/11 schmidt-cassegrain with f/6.3 focal reducer.
Combination of 5, 3 minute images using red, green, and blue filters.
SBIG ST-9E CCD camera.
14" f/11 schmidt-cassegrain with f/6.3 focal reducer.
Combination of 15, 3 minute images using red, green, and blue filters.
SBIG ST-9E CCD camera.
5" f/5 refractor at prime focus.
Combination of 10, 3 minute images using red, green, and blue filters.
SBIG STL-1001E CCD camera.
5" f/5 refractor at prime focus.
Combination of 10, 3 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
