Whirlpool Galaxy M51

531a76989d5fff0d26a80c5d81a60ff5.1824x0_q100_watermark_watermark_opacity-15_watermark_position-6_watermark_text-Copyright Stefan Westphal
The Whirlpool Galaxy (also known as Messier 51aM51a, or NGC 5194) is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus in the constellation Canes Venatici. Recently it was estimated to be 23 ± 4 million light-years from the Milky Way, but different methods yield distances between 15 and 35 million ly. Messier 51 is one of the best known galaxies in the sky. The galaxy and its companion (NGC 5195) are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars. The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understand galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions.

Imaging telescopes or lenses: Orion Optics UK SPX 250
Imaging cameras: Artemis Atik 383L+
Mounts: Vixen New Atlux + Skysensor 2000
Guiding telescopes or lenses: Orion Optics UK SPX 250
Guiding cameras: M-Gen Guiding Kamera
Focal reducers: GPU Komakorrektor
Software: Fitswork4, Adobe Photoshop CS2
Filters: Baader Planetarium Ha 36mm 7nm, Baader Planetarium 36mm Luminance, Baader Planetarium 36mm Red, Baader Planetarium 36mm Green, Baader Planetarium 36mm Blue
Accessories: Lacerta MGEN2
Dates: March 8, 2014, March 20, 2014
Locations: Kreben
Frames:
Baader Planetarium 36mm Blue: 9×600″ -20C bin 1×1
Baader Planetarium 36mm Green: 8×600″ -20C bin 1×1
Baader Planetarium 36mm Luminance: 16×600″ -20C bin 1×1
Baader Planetarium 36mm Red: 9×600″ -20C bin 1×1
Baader Planetarium Ha 36mm 7nm: 5×900″ -20C bin 1×1
Integration: 8.2 hours
Darks: ~24
Flats: ~60
Bias: ~150

Author: Stefan Westphal
AstroPhotography of the day by SPONLI 24 Aug 2014