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M51 Whirlpool Galaxy LRGB, 


            Randal Healey

M51 Whirlpool Galaxy LRGB

Technical card

Resolution: 3917x2609

Dates:Aug. 24, 2017

Frames: 75x600"

Integration: 12.5 hours

Avg. Moon age: 2.85 days

Avg. Moon phase: 8.92% job: 1723939

Locations: Healey "Utahopia" Observatory, Kaysville, Utah, United States


The Whirlpool Galaxy, also known as Messier 51a, M51a, and NGC 5194, is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus in the constellation Canes Venatici. It was the first galaxy to be classified as a spiral galaxy. 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 light-years. 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.



Randal Healey
License: None (All rights reserved)


M51 Whirlpool Galaxy LRGB, 


            Randal Healey