m5

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m51

Commentaires sur l’objet photographié

outters-nicolasVoici une vue grand champs de M51 et plein de petites galaxies environnantes, on

a du mal à distinguer les étoiles des galaxies, au juste je n’arrive pas à

savoir combien il y en a !

Image LRGB

Données techniques

Données techniques de prise de vue

Object :M51
Common name : Galaxie des Chiens de Chasse
Date : du 7 avril au 27 avril 2011
Optics :Tec140 F7
Mount : Paramount ME Numéro 2
Location : Orange observatory
Seeing : (ccdinspector)
Ccd : Proline 16803
filter wheel :FLI
filters : Astrodon LRGB
Focuser :Robofocus
Guiding : ST7
Temp. out : +5° à +10°
Temp ccd : -35°
Total exposure :16 h

bleu : 24 x 5 mn b1x1
vert : 24 x 5 mn b1x1
rouge : 24 x 5 mn b1x1
Luminance : 32 * 20m b 1×1

Données scientifiques

The Whirlpool Galaxy, also known as Messier 51a, M51a, or NGC 5194, is an interacting[7] grand-design[8] spiral galaxy with a Seyfert 2 active galactic nucleus[9] in the constellation Canes Venatici. It was the first galaxy to be classified as a spiral galaxy.[10] Recently it was estimated to be 23 ± 4 million light-years from the Milky Way,[3] but different methods yield distances between 15 and 35 million light-years. Messier 51 is one of the best known galaxies in the sky.[11] The galaxy and its companion, NGC 5195, are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars.[12] 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.