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Orion is still around in the early evening in Australia. It won’t be there for long, so time to try and catch an old favourite with a massive scope.

This is the first time I’ve used T30 at Siding Spring, it’s a 20″ CDK (Corrected Dall-Kirkham Astrograph) with an FLI camera at 0.81 arc-sec/pixel. It has a huge aperture and long focal length at 2.28m, while still being really fast at F4.5 due to having a 0.66x Focal Reducer fitted. It’s mounted on a Planewave Ascension 200HR which has such good tracking that the SSO crews have disabled active guiding.

This was only 33 degrees away from a 28% illuminated moon, so is quite noisy. I will need to wait for the moon to move along before trying O3 and S2.

Camera: FLI-PL6303E (-15°C)
Scope: Planewave 20″ (0.51m) CDK F4.5
Mount: Planewave Ascension 200HR
Guiding: None
Capture Software: ACP, Maxim DL
Processing Software: Deep Sky Stacker, PixInsight
Exposures: 5 x 5 mins (1×1 Hα). 20 mins total
Calibration: Automated

horsehead_nebula

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One Comment

  1. Stunning work as always Euan!!


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