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Welcome toGregg's Astronomy Page |
Albert L. Ruppel Observatory |
Updated: Sunday, May 06, 2012 |
New Image (5/6/2012) |
|
NGC 4725 Spiral Galaxy
in Coma Berenices. Spring
is often considered 'galaxy
season' among amateur astronomers because of the large number of
galaxies visible in the
night
sky.
Coma
Berenices (Berenice's
Hair) is a faint
constellation that is home to a number of
island
universes. NGC 4725 is a
spiral galaxy
about 41 million light-years distant. This galaxy is unusual in that
it appears to have just a
single arm in its
spiral that is tightly wound in several turns around the
central bar. There
also appears to be some
galactic
interaction with NGC 4747 (upper left). For another view of NGC
4725 see the APOD of
6/6/2009.
My image was made on April
18-19,
2012 with LRGB integrations in
the ratio of 120:30:30:30.
The data were acquired
using CCD Commander with an STL11000 and ASA 10N on an
AP900 GTO. The images
were stacked in
MaximDL. Final processing was
done in
Photoshop. |
| This page illustrates what can be photographed using amateur telescopes and a CCD camera. I currently use an SBIG STL11000M camera and have previously used a SBIG and Starlight Xpress cameras, as well as a Cookbook 245 camera that I built myself. Most of the images were actually taken from my backyard near a busy street with several street lights. Not only is the CCD camera a great imaging tool, but it allows "real time" observation of objects not normally visible in areas with moderate-severe light pollution. |
International Dark Sky Association
