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Добавлено: 04.11.2017 - 09:53

NGC 281, IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm. This 20×30 arcmin sized nebulosity is also associated with open cluster IC 1590, several Bok globules and the multiple star, B 1. It collectively forms Sh2-184, spanning over a larger area of 40 arcmin.

Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.

L = 13 * 1800 sec. bin1, R = 9 * 900 сек. bin2, G = 9 * 1000 сек. bin2, B = 9 * 1100 сек. bin2, Ha = 26 * 1800 сек. bin2.

Total exposition - 27 hours

Pixinsight 1.8 and Photoshop.

Добавлено: 27.10.2017 - 09:34

Messier 71 (also known as M71 or NGC 6838) is a globular cluster in the constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1745 and included by Charles Messier in his catalog of comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775.

The star cluster is at a distance of about 12,000 light years away from Earth and spans some 27 light years across. The irregular variable star Z Sagittae is a member of this cluster.

R = 11 * 500 sec. bin1, G = 11 * 600 sec. bin1, B = 11 * 700 sec. bin1.

PixInsight 1.8, Photoshop CC

Добавлено: 08.10.2017 - 16:28

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.

Добавлено: 01.10.2017 - 14:57

NGC 7662, also known as the Blue Snowball Nebula or Snowball Nebula, is a planetary nebula located in the constellation Andromeda.

Ha = 20 * 1800 sec. bin1, OIII = 10 * 1800 sec. bin1, OIII = 20 * 900 sec. bin1.

Total exposition is 20 hours.

Pixinsight 1.8 and Photoshop.