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M42 Great Nebula in Orion (Narrowband)

Telescope: TEC140 f7 APO @ f5.1 (715mm)
Camera: SBIG ST-10XE
Mount: AP900GTO
Exposure: 30:30:30min Hydrogen Alpha Oxygen III Helium II
Date: Apr 05
Location: New Mexico
Author: Michael J. Chapa