NGC 4725

NGC 4725
Please click on the image for a bigger view.
Object: NGC 4725
Date of exposures: 27.03.2016, 10.04.2016, 28.04.2017, 29.04.2017
Distance: 41 Mio. Lightyears
Exposures: Lum: 38 x 360 Sec., RGB: 29 x 360 Sec., Sum: 6,7 hrs.
Telescope: 10'', F4 Newton
Focal length: 1000 mm
Filter: Astrodon LRGB E-Series, Astronomik CLS CCD Filter
Camera: Atik 460Exm
Guiding: Off Axis Guider, Lodestar
Mount: EQ8

NGC 4725 is a 9.3 mag barred spiral galaxy (and Seyfert 2 galaxy). While most spiral galaxies, including our Milky Way, have two or more spiral arms, NGC 4725 has only one. The galaxy has opaque dustballs and a yellowish central beam consisting of an older star population. NGC 4725 has a diameter of more than 100,000 light years and is 41 million light years away in the constellation Coma Berenices. In the picture field, a traditional-looking spiral is also seen as a smaller background galaxy (NGC 4712) - in addition, NGC 4747 with a pronounced tidal tail. NGC 4725 was discovered on 10 April 1785 by the German-British astronomer Wilhelm Herschel.


The image was exposed in a period of one year. The implementation also involved a small part of the FSQ85, which has a much larger field.

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