Observation by Chris Hooker: Venus nightside, 14th September 2023

Uploaded by

Chris Hooker

Observer

Chris Hooker

Observed

2023 Sep 14 - 04:35

Uploaded

2023 Sep 14 - 18:49

Objects

Venus

Equipment

Orion Optics (UK) OMC200 Mak-Cass
0.3x re-imaging focal reducer
Infra-red filters (details in the image)
ASI462MC camera

Exposure

Exposures 250 msec @ F/6

Location

Didcot, Oxfordshire

Target name

Venus

Title

Venus nightside, 14th September 2023

About this image

The nightside of Venus imaged in the near infra-red, with a comparison heat-map image from WinJupos in the same orientation. The image is a stack of just over 1600 frames of 250 msec, or about 6.7 minutes total exposure, processed in PIPP, Autostakkert! and Registax. There is some correlation between the dark markings, which represent the higher elevations on Venus that are cooler and therefore emit less in the infra-red than the lower hotter areas. Masking the crescent of Venus eliminates multiple ghost reflections and diffraction effects sometimes visible in such images, although the method is not without its own problems.

Files associated with this observation

Nightside 14 Sep 23 v2.png (161.6 kB)

Like this image

Jeremy Shears, Mike Foulkes, Bill Leatherbarrow, Paul G. Abel, Graham Winstanley, Mattia Piccoli, Steve Knight

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