Rosette Nebula in Narrowband with Stellarvue SVR90T

Location: San Bruno, CA

Telescope: Stellarvue SVR 90T with Televue x0.8 reducer on Takahashi NJP-Z Mount

Camera: Qhy9 CCD with Astronomik H-Alpha 12nm Filter and OIII 12nm Filter

H-Alpha: 20 exposures of 480sec on 01/22/2011

OIII: 26 exposures of 480sec on 01/21/2011

The pictures uses H-Alpha for Luminance, Red, and OIII for Green and Blue – and took a total of 6 hours of exposure. The regions rich in H-Alpha emission are red – but note the rosette nebula emits  quite considerably also in the OIII band – making the central regions appearing withe.

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