m51
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
LRGB COMPOSITION WIDE fIELD 2017
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