Objects

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.

NGC 2633 & NGC 2634

NGC 772

NGC 772 (also known as Arp 78) is an unbarred spiral galaxy approximately 130 million light-years away in the constellation Aries.

Around 200,000 light years in diameter, NGC 772 is twice the size of the Milky Way Galaxy, and is surrounded by several satellite galaxies – including the dwarf elliptical, NGC 770 – whose tidal forces on the larger galaxy have likely caused the emergence of a single elongated outer spiral arm that is much more developed than the others arms.

L = 20 * 1800 sec. bin1, R = 12 * 900 сек. bin2, G = 12 * 1000 сек. bin2, B = 12 * 1100 сек. bin2.

Total exposition - 20 hours

Pixinsight 1.8 and Photoshop.

NGC 772

NGC 281

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.

E. E. Barnard discovered this nebula in August 1883, who described it as "a large faint nebula, very diffuse." Multiple star 'B 1' or β 1 was later discovered by S. W. Burnham, whose bright component is identified as the highly luminous O6 spectral class star, HD 5005 or HIP 4121. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 arcsec. There has been no appreciable change in this quintuple system since the first measures were made in 1875.

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.

NGC 281