Images taken with 5inch or 6inch APO refractor or 12inch CDK or 13inch Newtonian
Recording with DMK41 or ASI120MC / ASI174 with FireCapture. Processing in AstroStakkert!3, Registax 6 and Photoshop CS2.
2020-09-06 03:40UT Jupiter / 04:50UT Saturn. Unfortunately so far there were no successful imaging sessions for the gas giants planets Jupiter and Saturn. Last weekend finally the conditions were right and the telescope ready. The seeing turned out to be OK for urban conditions from my balcony. In the images the same optical and camera setup was used, so the planets are shown at their relative scales. Saturn is almost 2x farther away than Jupiter and the ring system (as seen) is much larger than Jupiters disk.
2020-05-24 06:05UT. The crescent Moon joins Mercury and Venus with Venus having moved away from mercury and closer to the Sun.
2020-05-23 19:46UT. Just another chance before Venus is lost in the Sun's glare. The daytime seeing was a bit better on this day than on the previous attempt and we can see the thin crescent even better defined. The other inner planet mercury was nearby and in the same imaging session I recorded multiple AVIs. The images shown below are at same pixel scale and demonstrate how large the Venus crescent was. Further below a hand held image of the two planets in the evening twilight..
2020-05-21 20:25UT. The planet Venus is ending its evening visibility and is heading for inferior conjunction, the position between the Sun and the Earth. Just now Venus has a very thin but large crescent. This image was recorded with the ASI120MC on the 130mm refractor. Processing uses 5% of 4000 Frames . Software used FC2.5 / AS!3.0 / PS CS2.
2020-01-23 01:24UT & 01:30UT. The first observation of 2020 is also introducing a new imaging filter. The image on the left is the first experiment with an Optolong Venus-UV filter (passing UV-A light 320nm-400nm). Using the 12inch CDK and TeleVue 2.5x barlow the system transmission in UV is heavily reduced via glass absorption. Exposure 33ms and gain 400 make for a quite noisy image. There is also a ghost reflection and it's origin still has to be investigated. But there is a hint of the clouds structure on Venus! On the right a comparison in visible light. This one had exposure 2.3ms and gain 100. But besides the phase it shows no other features.
Copyright images and processing Gert Gottschalk.
Copyright Bilder und Verarbeitung Gert Gottschalk
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