Starry Vistas by Don J. McCrady
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NGC 7789

 

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NGC 7789 is one of the most dense open clusters in the fall sky. It is also one of the oldest, at around 1.5 billion years old, as evidenced by the myriad of old red stars in the association. It is located in Cassiopeia, and is a fine sight visually in telescopes of all apertures.

Takahashi Sky 90 at f/4.5
SBIG STL-4020M (self-guided)
Takahashi EM-200
Hutech LPS Filter
RGB: 40 minutes each channel (5 minute subexposures)
Processed in Maxim/DL and Photoshop