Stephan's Quintet Galaxy Group in Pegasus
Stephan’s Quintet can be found in the constellation Pegasus, the apparent magnitude of these galaxies hovers around 14.0, making this a tough object to capture in a smaller telescope. This group of galaxies was discovered by Edouard Stephan in 1877 at Marseille Observatory. Although referred to as a quintet, only four of the five galaxies are interacting with each other at a distance of about 300 million light years! NGC 7320 is actually much closer at a distance of “only” 40 million light years.
The members in the group include NGC 7320, NGC 7319, NGC 7318a, NGC 7318b, and NGC 7317. The group is also listed in the Arp catalog as ARP319.
Observation data (Epoch J2000)
Constellation(s): Pegasus
Right ascension: 22h 35m 57.5s
Declination: +33° 57′ 36″
Number of galaxies: 5
Tech Specs: Meade 12” LX-90 SCT Telescope, Antares Focal Reducer, ZWO ASI2600MC camera running at 0F, 177 x 60 seconds, Celestron CGX-L pier mounted, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: August 1, 2025. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).
Stephan's Quintet Galaxy Group in Pegasus
Stephan’s Quintet can be found in the constellation Pegasus, the apparent magnitude of these galaxies hovers around 14.0, making this a tough object to capture in a smaller telescope. This group of galaxies was discovered by Edouard Stephan in 1877 at Marseille Observatory. Although referred to as a quintet, only four of the five galaxies are interacting with each other at a distance of about 300 million light years! NGC 7320 is actually much closer at a distance of “only” 40 million light years.
The members in the group include NGC 7320, NGC 7319, NGC 7318a, NGC 7318b, and NGC 7317. The group is also listed in the Arp catalog as ARP319.
Observation data (Epoch J2000)
Constellation(s): Pegasus
Right ascension: 22h 35m 57.5s
Declination: +33° 57′ 36″
Number of galaxies: 5
Tech Specs: Meade 12” LX-90 SCT Telescope, Antares Focal Reducer, ZWO ASI2600MC camera running at 0F, 177 x 60 seconds, Celestron CGX-L pier mounted, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: August 1, 2025. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).