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M57- The Ring Nebula
M57 - The Ring Nebula in Lyra
L(Ha)-R(Ha):G:B combination.
L=600min Ha=1800min R=600min G=600min B=600min
Telescope: DK-Astrograph 12.5" F/7,8
CCD: SBIG ST-10XME
Mount: MOFOD - Gemini Telescope Design
Località: Trivolzio (PV)
