Starry Vistas by Don J. McCrady
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Sh 2-155 - The Cave Nebula

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The Iris Nebula is also known as NGC 7023 in the constellation Cepheus. It is primarily a reflection nebula (hence the blue colour), but there are dark red dusty regions in the surrounding vicinity.

Takahashi Sky 90 at f/4.5
SBIG STL-4020M (self-guided)
Hutech LPS Filter
Luminance: 60 minutes (5 minute subs)
RGB: 35 minutes each channel (5 minute subs)
H-Alpha: 72 minutes (8 minute subs)
Processed in Maxim/DL and Photoshop
Noel Carboni's Astronomy Tools Actions


H-Alpha

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