Caldwell 4

Posted: Oct 20th, 2026

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NGC

IC

HD

Technical Info

Telescope/Lens: Askar 71F

Camera: ZWO ASI2600MM 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:

78 x 300" ISO/Gain: 100 - Optolong L

9 x 300" ISO/Gain: 100 - Optolong R

17 x 300" ISO/Gain: 100 - Optolong G

9 x 300" ISO/Gain: 100 - Optolong B

Yellow, Bortle 5 zone:

Samara, Russia

Sep 22nd, 2026

9 h 25 m

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Resolution: 5979x3363 px

Scale: 22432 KB

251

Current photo Updated

Today, at 01:06

9 h 25 m

15 Sep, 2026

12 h 5 m

Decided to play with the data I have. The main backbone of the image is 7 hours with the 585mc pro. I extracted the L channel from this data and stacked it with…

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