Observation by Chris Hooker: Rupes Altai (Altai Scarp)

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2017 May 31 - 19:02

Uploaded

2017 Jun 04 - 17:24

Objects

The Moon

Equipment

Orion Optics OMC200 Maksutov-Cassegrain
ZWO ASI120MM-S mono camera
Baader 610 nm red filter

Exposure

3.3 msec

Location

Didcot, Oxfordshire

Target name

Rupes Altai

Title

Rupes Altai (Altai Scarp)

About this image

300 of 3000 frames stacked in Autostakkert!2, wavelet processing and histogram adjustment in Registax.

The Rupes Altai is part of the outer ring of the Nectaris impact basin, part of which is visible at the top right. The badly degraded crater Catharina is towards the top (north) of the image. At lower centre is the curious linear feature known as Larrieu's Dam, which is a ridge on the NW side of the small trapezium-shaped crater Polybius K. Under the right illumination, as in this image, it resembles a dam holding back a small lake, which it clearly is not! For a discussion of this feature, see the BAA Lunar Section Circular vol 50 No 5 from May 2013.

Files associated with this observation

Catharina 220133 31 May 17 C.png (1.3 MB)

Like this image

Chris Dole, Jeremy Shears, Bill Leatherbarrow, David Basey, Steve Knight, Dawson, Peter Mulligan, Peter Carson, Mike Scarisbrick, Dave Finnigan

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