28 April 2015

  Galaxies in Pegasus (NGC7331 and Stephan's Quintet)

By  Oleg Bryzgalov
https://www.flickr.com/photos/olegbr/ )

Explanation: This wide telescopic view reveals galaxies scattered beyond the stars and faint dust nebulae of
the Milky Way at the northern boundary of the high-flying constellation Pegasus. Prominent at the upper right is
 NGC 7331. A mere 50 million light-years away, the large spiral is one of the brighter galaxies not included in
Charles Messier's famous 18th century catalog. The disturbed looking group of galaxies at the lower left is well-known
 as Stephan's Quintet. About 300 million light-years distant, the quintet dramatically illustrates a multiple galaxy
collision, its powerful, ongoing interactions posed for a brief cosmic snapshot. On the sky,
the quintet and NGC 7331 are separated by about half a degree. (Text from NASA)

This picture was photographed during 7 nights in October, 2014 in Petrivske, Ukraine.
Equipment: home assembled reflector 10 in., f/3.8
Mount WhiteSwan-180 with a control system «Eqdrive Standart», camera QSI-583wsg, Tevevue Paracorr-2. Off-axis guidecamera QHY5L-II.
LRGB filter set Baader Planetarium.

L=50*900 sec., unbinned
RGB= 14*300 sec., bin.2
FWHM  sum in L channel - 2.79"
Processed Pixinsight 1.8, and Photoshop CS6


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