Observation by Alan Snook: Cauchy Domes Tau and Omega

Uploaded by

Alan Snook

Observer

Alan Snook

Observed

2026 Apr 21 - 20:29

Uploaded

2026 Apr 23 - 19:51

Objects

The Moon

Equipment

Altair Astro 130EDT refractor, x2 Barlow, ZWO ASI662MC, UVIRBlock.

Exposure

8ms x best 2k of 10k frames.

Location

Kent, UK

Target name

Cauchy Tau and Cauchy Omega

Title

Cauchy Domes Tau and Omega

About this image

Despite poor seeing, the summit pit on Cauchy Omega is just about identifiable. The domes are 6-7 miles (10-12km) wide, so you can judge the size of the pit. Also shown are the fault & rille passing either side of the crater Cauchy. The combined formation is akin to the Straight Wall, crater Birt and Rima Birt in the Mare Nubium.

Files associated with this observation

Cauchy_domes_2026-04-21_20-29-35_AlanSnook.png (2.0 MB)

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