23 May 2024
The Whirlpool Galaxy, also known as Messier 51a (M51a) or 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 It is 7.22 megaparsecs (23.5 million light-years) away and 23.58 kiloparsecs (76,900 ly) in diameter.
M51
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Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Luminance | 88 | 1h56m | 79 |
| Red | 158 | 3h28m | 79 |
| Green | 150 | 3h18m | 79 |
| Blue | 122 | 2h40m | 79 |
| Halpha | 82 | 1h46m | 78 |