Category: Light Pollution

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Jupiter and Antares

Amazing what a difference if you move south with 20° latitude!! That is what happened travelling to Cairo. Constellations and planets are soo much higher in the sky. Was it not for the severe light pollution (estimation SQM 19), the whole constellation of Scorpius would be visible. The upward light rays to the northeast are part of the ‘famous’ sound-and lightshow of the Pyramids.

Jupiter and Antares July 2019 from Mena House, Cairo. Nikon D5100 18mm
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Clear again after 2 months!

Yesterday evening, a large break in the eternal cloud pack allowed at last some more imaging! Perfect for the first light of the ASI183MM and also the new guiding/planetary camera the ASI290MM.

During the imaging session, I could picture the setup before and after the streetlights were switched off…. Imagine the difference!

Lights still on Nikon D750 30s 24mm iso800 F6dot7
Imaging in the plain light off a streetlight 30 meters from the scope… Nikon D750 30s 24mm iso800 F6.7
Streetlights switched off Nikon D750 30s 24mm iso800 F6dot7
And a few seconds later the lights are switched off! Nikon D750 30s 24mm iso800 F6dot7 SQM values dropped a bit from 20,30 to 20,55
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