NGC 7331 and Stephan's Quintet
Here is the result of the acquisitions of the night Saturday, 10/25 to Sunday, 10/26 passed on the heights of the spine, a small village lost in the Baronies Provençale.
NGC 7331 is the large galaxy on the left. It is a barred spiral located has about 42 million light-years. Its diameter is around 100,000 light years so it must looke quite like the Milky-Way.
Stephan's Quintet is the galaxy cluster on the right. Their are located between 300 and 350 million l.y. but one which is 40 million l.y.
All this is visible in the constellation of Pegasus. If NGC 7331 is relatively accessible by eyes through a telescope, Stephan's Quintet is much more difficult. It need a beautiful sky and a telescope with a large diameter to see him. That night, it was not very bright in a T350.
45 exposures of 5 minutes.
Camera : Canon EOS 1000D unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Outside temperature : 11°C to 6°C
Sensor temperature : 13.5°C
Humidity : 60%
SQM : 21.3
Software : auto-guiding with PHD Guiding, acquisition with Astro Photography Tool, processing PixInsight and a little bit of photoshop.
Location : L'Epine, France