Globular Cluster M5

Messier 5

Other names:NGC 5904
Distance:24500 light years
Lens:GSO RC8
Field of view:71' x 39'
Cameras:Canon 800D
Mount:Skywatcher EQ6-R
Guiding:ZWO OAG, Lacerta MGEN-II
Exposure time:3h
OSC 90 x 2min
Sizes 1920 x 1080 | 5814 x 3234
In the full size image you will find all stars have a blue halo on the left and a yellow one on the right side. This is caused by the atmospheric diffraction as the object is low in the sky from my location. The image is rotated so that the horizon is on the left side.
The bright star in the upper left is 5 Serpentis. If you look closely you might see that is a double star. The larger component is red giant with a magnitude of 5.1 and the smaller is a mag 10.1 star in 11.4" angular distance. Here is a 4x magnified view of it:

5 Serpentis