NGC 1491 – CDK14 – (Rouz Astro Reducer-OAG Kit)

NGC 1491 – CDK14 – (Rouz Astro Reducer-OAG Kit)

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Click on the Image to see Full Size


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 50 mm · Chroma OIII 3nm Bandpass 50 mm · Chroma SII 3nm Bandpass 50 mm
Accessories : Optec Gemini Rotating Focuser · Optec Sagitta Off-Axis Guider · Planewave Reducer 0.66x CDK12.5-14-17
Software : Pleiades Astrophoto PixInsight · Stefan Berg Nighttime Imaging ‘N’ Astronomy (N.I.N.A. / NINA)

Acquisition details

Dates : Nov. 1, 2022
Frames : Chroma H-alpha 3nm Bandpass 50 mm: 123×600″(20h 30′) (gain: 56.00) -10°C bin 1×1
Chroma OIII 3nm Bandpass 50 mm: 49×600″(8h 10′)
Chroma SII 3nm Bandpass 50 mm: 81×600″(13h 30′)
Integration : 42h 10′
Avg. Moon age : 7.62 days
Avg. Moon phase : 52.54%


NGC 1491, an emission nebula in Perseus. Not a very common imaging target, one of the challenges of this nebula is the large dynamic range required to capture both the very bright core and the very dim outer regions.

This image was captured with the CDK14 with a custom configured imaging train that enables an off axis guider to be used in conjunction with the dedicated Planewave 0.66x focal reducer.
I wrote an article on the custom setup here:

A significant total integration time of 42 hours with the low noise QHY600m (gain56) and 3nm Chroma filters allowed a good amount of faint details to be extracted. The complex clouds seen in the background were better illustrated below, a starless version, to emphasize the nebulosity:

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