Kemble’s Cascade with Samyang 135mm

Kemble's Cascade RGB Wide field
Kemble's Cascade in Widefield Setting

Kemble’s Cascade (Kemble 1) is a chance straight-line alignment of 17 or so stars between the 5th and 10th magnitudes in the far northern constellation of Camelopardalis.  The stars are of different colours and look lovely in a widefield telescope or binoculars.  At the end of line of stars is the open star cluster NGC 1502. This asterism is named after the Franciscan monk and amateur astronomer Lucian Kemble.  The cascade itself is about three angular degrees in length.

Image Technical Data

Imaged from my backyard in Nottingham, UK on 14 September 2020.  Part of an automated capture sequence and the exposures were taken between 02:00 > 04:00 in the morning.  Needless to say I was in bed asleep at the time 🙂  I processed the images afterwards.  I used Samyang 135mm DSLR lens connected to my Moravian Instruments G2-8300 CCD camera with Astrodon RGB Gen 2 E series filters on my NEQ6 mount.  All exposures binned 1×1.  No separate luminance (i.e. just RGB)

Red > 12 x 300s ;   Green > 12 x 300s ; Blue > 10 x 300s

Total integration time is just short of three hours.  Processed in PixInsight and Photoshop and captured with Sequence Generator Pro.

Kemble's Cascade Zoomed
Zoomed in version

I just cut out the cascade stars from the image above.  Personally, I prefer it in the wider setting in the topmost image

Kemble's Cascade Annotated
Annotated Version
Kemble's Cascade Inverted
Inverted Colour Version

The inverted colour version above may make it easier to see the “cascade” of stars and make it easier for you to find them in the main image.

I hope you like it!

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