Observation by Chris Hooker: Venus nightside, 17th February 2025

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2025 Feb 17 - 18:49

Uploaded

2025 Feb 18 - 18:09

Objects

Venus

Equipment

254 mm F/4.8 Newtonian
1.45x IR Barlow lens
Bandpass filters 1000 - 1025 nm
Player One Uranus-C camera

Exposure

30 msec @ F/7

Location

Didcot, Oxfordshire

Target name

Venus

Title

Venus nightside, 17th February 2025

About this image

Venus was imaged in a short window of relatively clear skies, although some high cloud was present which reduced the contrast of the nightside. Seeing was Ant III, becoming IV.

The image is a processed stack of 19,000 frames from two 10,000 frame video captures, with extreme gamma and contrast enhancement to bring out the nightside. There are some slightly darker features visible, which were consistent between this image and another obtained later in worse seeing. These markings are in reasonable agreement with the darker (cooler) features on the WinJupos heat map.

The bright streaks above and below the overexposed crescent are diffraction spikes from the secondary support, which I have modified to have only two vanes.

Files associated with this observation

Venus nightside 17 Feb v2.png (223.3 kB)

Like this image

Geof Lewis, Jeremy Shears, Bill Leatherbarrow, Callum Potter, James Weightman, Steve Knight, Dr Paul Leyland, Dr Richard John McKim

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