Galaxies
NGC 4214
NGC 4214 is a dwarf barred irregular galaxy located around 10 million light-years away in the constellation Canes Venatici.
NGC 4214 is both larger and brighter than the Small Magellanic Cloud as well as a starburst galaxy, with the largest star-forming regions (NGC 4214-I and NGC 4214-II) in the galaxy's center. Of the two, NGC 4214-I contains a super star cluster rich in Wolf-Rayet stars and NGC 4214-II is younger (age less than 3 million years), including a number of star clusters and stellar associations.
L = 21 * 600 sec. bin1, Ha = 11 * 1800 sec., RGB = 10 * 600 sec. bin2, in each channel.
Total exposition - 14.0 hours.
Pixinsight 1.8, Photoshop.
NGC 2685
NGC 2685 (also known as the Helix Galaxy) is a lenticular and polar ring Seyfert Type 2 galaxy in the constellation Ursa Major. It is about 50,000 light-years across and about 42 million light-years away from Earth. It is receding from Earth at 883 kilometers per second. It is an object of great scientific interest, because polar-ring galaxies are very rare galaxies. They are thought to form when two galaxies gravitationally interact with each other. "The bizarre configuration could be caused by the chance capture of material from another galaxy by a disk galaxy, with the captured debris strung out in a rotating ring. Still, observed properties of NGC 2685 suggest that the rotating ring structure is remarkably old and stable."
It was discovered by Wilhelm Tempel in 1882.
L = 17 * 1800 sec. bin1, RGB = 8 * 1000, 1100, 1200 sec. bin2, in each channel.
Total exposition - 15.8 hours.
Pixinsight 1.8, Photoshop.
NGC 2633 & NGC 2634
NGC 2633 and NGC 2634 - spiral and elliptical galaxies in the constellation Giraffe. They were discovered by Ernst Wilhelm Leberecht Tempel on August 11, 1882.
L = 17 * 1800 sec. bin1, RGB = 11 * 1000, 1100, 1200 sec. bin2, Ha = 13 * 1800 sec. bin2, in each channel.
Total exposition - 25 hours.
Pixinsight 1.8, Photoshop.
Abell 2218
Abell 2218 is a cluster of galaxies about 2 billion light-years away in the constellation Draco.
Acting as a powerful lens, it magnifies and distorts all galaxies lying behind the cluster core into long arcs. The lensed galaxies are all stretched along the cluster's center and some of them are multiply imaged. Those multiple images usually appear as a pair of images with a third — generally fainter — counter image, as is the case for the very distant object. The lensed galaxies are particularly numerous, as we are looking in between two mass clumps, in a saddle region where the magnification is quite large.
L = 31 * 1800 sec. bin1, RGB = 9 * 1800 sec. bin1.
Total exposition - 29 hours.
Pixinsight 1.8 and Photoshop.
