Observation by Chris Hooker: Venus nightside, 25th February 2025

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2025 Feb 25 - 18:48

Uploaded

2025 Feb 26 - 11:56

Objects

Venus

Equipment

254 mm F/4.8 Newtonian
1.45x IR Barlow lens
Bandpass filters 975 - 1025 nm
Player One Uranus-C camera

Exposure

20 & 30 msec @ F/7

Location

Didcot, Oxfordshire

Target name

Venus

Title

Venus nightside, 25th February 2025

About this image

I observed at a site away from home this evening, to try and avoid the bad seeing due to a long air-path over built-up areas. The seeing was noticeably better at the remote site.

For this session I experimented with different filters, specifically removing the Thorlabs FELH1000 for half of the captures. The image combines data from videos recorded with both filters and with only the Edmund Optics 1000nm / 50nm bandpass. The videos were stacked separately, using 80% (4000 of 5000) of the frames from each, then the stacks were themselves stacked in Registax before sharpening and contrast stretching. The combined exposure time of all the frames used was 38 minutes.

The darker features are reasonably consistent with the heat map from WinJupos.

Files associated with this observation

25 Feb 25 for BAA.png (179.1 kB)

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Bill Leatherbarrow, Peter Mulligan, Geof Lewis, Dominic Ford, Martin Lewis, Ron Johnson, Philip Masding

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