NGC 4725 (Coma Berenices)


Object: Constellation: Coordinates: Size: Brightness:
NGC 4725 Com 12h50m / +2530' 11.0' x 7.4' 9.3mag

The beautiful barred spiral galaxy NGC 4725 with its prominent ring structure in the constellation Coma Berenices on March 20, 2020. NGC 4725 is a Seyfert Galaxy, suggesting an active nucleus probably containing a supermassive black hole. NGC 4725 is the brightest member of the Coma I galaxy Group and is about 40 million light-years from Earth. In the same field of view, the spiral galaxy NGC 4712 can be seen. It is 196 million light-years from Earth. NGC 4725 was discovered by Frederick William Herschel in 1785 while NGC 4712 was discovered by John Herschel in 1832 (source: Wikipedia).

Fourty-nine 3 minute exposures at ISO 800 were added for this shot with the DeepSkyStacker software (resulting in a 2 hour and 27 minutes exposure) and the final image processing was done in Photoshop.
Equipment: Canon EOS 450D Baader modified camera, TeleVue Paracorr Type II coma corrector, 16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison: image of the moon with the same equipment).


Search chart for NGC 4725. Map © 2020 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .