British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community

Venus nightside at 1000nm 6th May 2020


Expand image

About this observation
Martin Lewis
Time of observation
05/05/2020 - 19:47
Observing location
St Albans, UK
444mm Dobsonian
Edmunds 1000nm filter 25nm bandwidth
200msec 18.9mins accumulated exposure

Unexpectedly good conditions last night just as the skies started to darken, for 1000nm imaging of the night side of Venus- the atmosphere being transparent at these wavelength allowing a view of the hot surface of the planet.

This is a Winjupos combination of 18.9mins accumulated exposure with 1000nm Edmunds filter (25nm bandwidth) with an increase to 200msec exposures following very helpful advice and discussions with Anthony Wesley and Phil Miles. All at prime focus on my f4.4, 444mm Dobsonian

A number of dark patches can be seen on the night side of Venus which can day to day be seen rotating slowly with the planet and so are confirmed as real features- most likely higher elevation features which are subsequently cooler.


Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.