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I’ve been working on this on and off for a few months now. The data was captured over a few weeks in the summer while this was sitting high at SSO. Across all the frames and colours it’s almost 6 hours worth of data and about 1.7GB of files to crunch. I’ve never attempted a mosaic before, but it is the only way to properly capture this amazing area of the sky. Even with the wide field of view on T12, it only just fits in a 2×2. The hardest part about imaging this is the amount of colour in the area, it’s hard to distinguish gradients from nebulosity.

The Rho Ophiuchi Cloud Complex is a huge star forming area in the constellation of Ophiuchus. It’s the closest star forming region to the Solar System at around 460 light years away. The bright yellow star towards the bottom is Antares, which is one of the brightest stars in the sky. There are also 3 fairly big globular clusters in there too, can you spot them?

Camera: SBIG STL-11000M with Baader RGB (-15°C)
Scope: Takahashi FSQ-106 F5
Mount: Paramount PME
Guiding: SBIG Internal
Capture Software: ACP, Maxim DL
Processing Software: Deep Sky Stacker, PixInsight
Exposures: 74 x 2.5 mins (2×2 RGB), 31 x 5 mins (1×1 Lum). 5 Hours 40 mins total
Calibration: Automated

Rho Ophiuchi

Full Mosaic Lum Template


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