Caldwell 3

Posted: May 4th, 2026

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NGC

IC

HD

Technical Info

Telescope/Lens: Askar 71F

Camera: ZWO ASI585MC Pro

Mount: JUWEI 14

Guide Scope: ToupTek GS-200 AR

Guide Camera: ZWO ASI662MC

Software: Siril, Photoshop, Lightroom, StarNet++

Accessories: CAA, EAF, EFW, ASIAIR MINI, Askar Reducer x 0.75, Gemini PowerBox

Exposure:

60 x 120" ISO/Gain: 200 - Optolong UV IR Cut

Yellow, Bortle 5 zone:

Samara, Russia

May 4th, 2026

2 h 0 m

14

1

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Resolution: 3430x1856 px

Scale: 3629 KB

168

Quite dim, as it turned out. I decided to go with 120-second exposures; the moon plus thin clouds caused blurring. I think at least 5 hours are needed for the Ha background and the beauty.

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