NGC 7331 with Stephan's Quintet
This galaxy-rich section of Pegasus contains two galaxy clusters. The
largest of these is dominated by NGC 7331 (the cluster is often called the
Deerlick Group). Other smaller members in this group are NGC 7325, NGC 7336,
NGC 7335, NGC 7337, and NGC 7340. The cluster is approximately 46 million
light years distant.
Nearby is a smaller, but more famous cluster known as Stephan's Quintet,
containing members NGC 7317, NGC 7318A, NGC 7318B, NGC 7319 and NGC 7320.
NGC 7320 is thought to be a foreground galaxy, and not actually physically
related to the rest of the members.
Takahashi Sky 90 at f/4.5
SBIG STL-4020M (self-guided)
Takahashi EM-200
Hutech LPS Filter
Luminance: 2 hours (5 minute subexposures)
RGB: 35 minutes each channel (5 minute subexposures)
Processed in Maxim/DL and Photoshop
Noel Carboni's Astronomy Tools Actions