Telescopic Star Trails

The motion of the stars in Carina, as viewed through my telescope. Note the different star colours and the ghostly red Carina Nebula.

Exposure: 1 x 1 min, ISO 5000.
Date: 2018-01-18.
Location: Field night at The Oaks, NSW, with Macarthur Astronomical Society
Sky: semi-dark rural with metropolitan sky-glow between East and North.
Cloud:  clear.
Moon: No.
Processing: Canon DPP > Deep Sky Stacker > GIMP.
Cropping: no.
Altitude: 36° above SSE Horizon.

Imaging telescope: Skywatcher Esprit 120ED Super APO triplet refractor.
Focal length: 840 mm, focal ratio: f/7.
Imaging camera: Canon EOS 60D.
Guiding camera: off
Guiding control software: PHD2: off
Telescope mount: SkyWatcher EQ6-R.
Polar aligning: QHYCCD PoleMaster.
Field flattener: yes; filter: no.

Observing Notes:
An accidental image.
I decided to take dark images at the end of the session, switched off the motor drives and guidance and after taking several “darks” I realised I had forgotten to put the telescope end cap on!

Image © R.Powell



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