Observation by Duncan Hale-Sutton: Venus with cusp extensions

Uploaded by

Duncan Hale-Sutton

Observer

Duncan Hale-Sutton

Observed

2025 Mar 17 - 18:36

Uploaded

2025 Mar 17 - 21:01

Objects

Venus

Equipment

Celestron NexStar 102 SLT
9mm orthoscopic eyepiece
Star diagonal

Location

Neatishead, Norfolk

Target name

Venus

Title

Venus with cusp extensions

About this image

Venus was a very thin crescent when I viewed it this afternoon. By comparison with with some phase diagrams on my phone I estimated the phase to be 1%. This is smaller than the 3% predicted. The thinness of the crescent and the turbulent atmosphere meant that the illuminated edge seemed to flicker in different colours. Also, I am convinced that I could see cusp extensions where the terminator meets the edge of the disc. I could the line of the cusps curving back inwards rather than just being a straight line to the edge. See my drawing.

Files associated with this observation

2025-03-17-DHS Venus.jpg (819.7 kB)

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Dominic Ford

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