Sharpless2-173 is a very faint emission nebula in the constellation Cassiopeia, located near the star Caph. It is seldomly imaged, but has been referred to as the Phantom of the Opera Nebula. I think it conjures up images of Prospero's masquerade ball in Edgar Allen Poe's story, "The Masque of the Red Death."

Imaging Camera: QSI540wsg
Imaging Scope: SVR90T
Guide Camera: SX Lodestar
Mount: Meade 10"LX200R
Filters: Astrodon 5nm Ha, RGB
Exposures: 6.5 hours Ha 20 min subs, 2.5 hours each RGB 10 min subs all unbinned
Processing: CCD stack and PS CS2
Date: 09/3/13 - 09/4/13
Location: My front driveway. Morristown, NJ