m51 tHE whirlpool galaxy

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. It lies in the constellation Canes Venatici, and was the first galaxy to be classified as a spiral galaxy. Its distance is estimated to be 23 million light-years away from Earth.

The galaxy and its companion, NGC 5195, are easily observed by amateur astronomers, and the two galaxies may be seen with binoculars. The Whirlpool Galaxy has been extensively observed by professional astronomers, who study it to understand

galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions.


HLrgb galaxy 2021





 Lrgb galaxy  RECORDED IN 2017

 Luminace Channel with My 250/1250 Reflector Telescope   2021



 Technical Data

Bortle Scale / SQM-L Bortle 5  /  ---
Period April , 2017 - April 2021
Primary Scope  FSQ106 106/530 - CCA 250/1250
Camera KAF8300 - IMX455
Mount NEQ6  - AP 1100
Total Exposure Time

7h (HLRGB) 120+120+60+60+60

Composition -
Location Val Imagna (Bergamo) Italy


 © Efrem Frigeni Astrophoto

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