Observation by Paul G. Abel: Venus: 25th May and some experiments

Uploaded by

Paul G. Abel

Observer

Paul G. Abel

Observed

2020 May 26 - 09:30

Uploaded

2020 May 26 - 09:30

Objects

Venus

Equipment

305mm Newtonian
x67 and x100
Filters: W15, W21, W25A and W47

Title

Venus: 25th May and some experiments

About this image

Drawing of Venus made on 25th May using the W21 orange filter. In recent days I have spotted some illusory cusp extensions which seem to arrive when viewing the planet with powers greater than x100 in poor seeing- the cusps don't come to fine focus in these conditions and can in a light sky make it appear as if extensions are present.

After experimenting with filters I found that the W21 orange filter helped to reduce the effect and that powers of x60 or so were adequate enough to see the thin crescent. I will write a little more about this in the next issue of Messenger which will be released in the next week or so.

Files associated with this observation

Venus_2020-05-25_1256UT_visual_PAbel.png (84.2 kB)

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Philip Masding, Chris Dole, Bill Leatherbarrow, Jeremy Shears, Ray Emery, Andy Wilson, Jimmy Fraser, Ron Johnson, Peter Carson

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