Messier 61 - a photo on Flickriver

Messier 61

La galassia a spirale M61 (abbreviazione di Messier 61) si trova a 60 milioni di anni luce e con il suo diametro di circa 100.000 anni luce (simile a quello della Via Lattea) è uno dei più grandi membri dell'ammasso di galassie visibile nella costellazione della Vergine.
Particolarità di questa galassia è la struttura dei suoi bracci: essi mostrano diversi improvvisi cambi di direzione, dando quindi a M61 un aspetto quasi poligonale.
Nell'immagine sono visibile altre due galassie brillanti: NGC 4301 in alto a destra e NGC 4292 (in basso a destra): ma guardando bene, parecchie altre remote galassie sono visibili sullo sfondo.

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The spiral galaxy M61 (short for Messier 61) is located 60 million light-years away and with its diameter of about 100,000 light-years (similar to that of the Milky Way) is one of the largest members of the cluster of galaxies visible in the constellation of Virgo.
A peculiarity of this galaxy is the structure of its arms: they show several sudden changes in direction, thus giving M61 an almost polygonal appearance.
In the image, two other bright galaxies are visible: NGC 4301 at the top right and NGC 4292 (at the bottom right): but looking carefully, several other remote galaxies are visible in the background.

Technical data
GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details:
L 47x300", RGB 16x300" for each channel, all in bin3 -15C gain 100
Total integration time: 7h55'
Acquisition: Voyager, PHD2
Processing: Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L: 21.18
Location: Promiod (Aosta Valley, Italy), own remote observatory
Date 19 April 2023, 18 February/11 April 2024

www.robertomarinoni.com

Taken on: March 22, 2025

Tags:

galassia

galassia a spirale

spiral galaxy

M61

Messier 61

GSO RC12

RC12

RC12 GSO

Promiod « less

Sets appears in: • Astronomy

Groups appears in: • Astrophotography - Astronomy - Astrophysics • Astrophotography (Pixinsight Processing)

Stats: 328 views / 4 comments

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