Pelican – First Light – (Rouz Astro Reducer-OAG Kit)

Pelican – First Light – Narrowband – CDK14 – (Rouz Astro Reducer-OAG Kit)

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Imaging Telescopes Or Lenses : Planewave CDK14 (Rouz Astro Reducer-OAG Kit)
Imaging Cameras : QHYCCD QHY600PH M
Mounts : Astro-Physics 1100GTO
Filters : Chroma H-alpha 3nm Bandpass · Chroma OIII 3nm Bandpass · Chroma SII 3nm Bandpass
Accessories : Optec Gemini Rotating Focuser · Planewave Reducer 0.66x CDK12.5-14-17
Software : Pleiades Astrophoto PixInsight

Acquisition details

Dates : June 26, 2022
Frames : Chroma H-alpha 3nm Bandpass: 44×600″(7h 20′) (gain: 56.00) -10°C bin 1×1
Chroma OIII 3nm Bandpass: 22×600″(3h 40′)
Chroma SII 3nm Bandpass: 18×600″(3h) (gain: 56.00) bin 1×1
Integration : 14h
Avg. Moon age : 27.19 days
Avg. Moon phase : 6.08%
Bortle Dark-Sky Scale : 6.00


First narrowband image with the new rig. The Pelican Nebula in SHO.

The CDK14 with the 0.66x reducer is very well suited for narrowband nebula imaging. The FOV is about 1.5 degrees with the full frame sensor, it was a bit too much and I had to crop a bit of the frame for my taste.

Being almost 50 degrees latitude north meant there no astronomically dark nights (not even 30 minutes) at this date, but I finally finished finetuning the setup and wanted to get some data regardless. It turned out better than I expected.

The combination of aperture, fast focal ratio, very narrow bandpass and the very low noise QHY600M meant a decent amount of data could be captured despite the conditions and Bortle 6 suburban sky.

The image scale is 0.465″/pixel and was downsampled to reduce the image size showing the “big picture”.

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