The Whale and the Hockey Stick NGC 4631 and NGC 4656

Posted: Apr 18th, 2026

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NGC

IC

HD

Technical Info

Telescope/Lens: Sky-Watcher 150/750

Camera: ZWO ASI 585 mm Pro

Mount: homemade harmonic mount

Guide Scope: SVBONY 60/240

Guide Camera: ASI120MM mini

Software: Siril. Photoshop

Accessories: Asi mini. Sharpstar 0.95x

Exposure:

101 x 60" ISO/Gain: 200 - R-Optolong

101 x 60" ISO/Gain: 200 - G-Optolong

101 x 60" ISO/Gain: 200 - B-Optolong

28 x 120" ISO/Gain: 200 - R-Optolong

28 x 120" ISO/Gain: 200 - G-Optolong

28 x 120" ISO/Gain: 200 - B-Optolong

Yellow, Bortle 5 zone:

Kasimov, Russia

Mar 23rd, 2025

7 h 51 m

6598

21

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Resolution: 5078x2756 px

Scale: 11862 KB

Konstantin Tihonov

58

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Comments

Great, I wonder what the average RMS values are for the mount?

16 Sep, 2026 Reply

Konstantin Tihonov Replied to Ivanru

Thank you). The average is 0.5. In good weather, from 0.35 to 0.55

17 Sep, 2026 Reply

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