NGC 7609 (Arp 150)
About image
The Hickson Compact Group 95 (HCG 95) is a group of four galaxies in Pegasus constellation.
Its brightest member is the galaxy NGC 7609 (HGC 95A), a large elliptical galaxy located 554 million light years away from Earth. It is catalogued also as Arp 150 because it is in evident interaction with the galaxy HGC 95C: in the image it is visible a “bridge” that connects the two galaxies, but also some faint tidal tails due to the strong gravitational interaction.
On the bottom side of the group it is visible the galaxy HGC95B, which is in reality not phisically connected to the group, being nearer to us. In the right top side of the group is visible HGC 95D, s apirale galaxy seen edge-on. Many oher faint and remote galaxies are visible in the field.
The image is a consistent crop of the original image, because these galaxies are really small.
Seeing during acquisition of L frames was only “discrete” for my location in the Alps.
Technical data
Optic 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, Ha 5nm
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details L 44x300" bin3 -15C gain 100
R 14x300" bin3 -15C gain 100
G 14x300" bin3 -15C gain 100
B 14x300" bin3 -15C gain 100
Total integration 7h10'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, BlurXTerminator, NoiseXTerminator, StarXTerminator
SQM-L 21.23
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 30 August/28 September 2025
© Roberto Marinoni 2019 - All rights reserved