astroman001

Definately dust on the camera sensor window or one of the fliters/barlow near the camera. Not on telescope corrector plate. Peter

I got the figure from the BAA website observing challenge on their home page upper left. It covers the methodology. Interestingly one of the images is credited to you!! Peter

Hi Geoff, There were no instructions on the BAA website. Yes it is easier to do when the GRS is near the CM. You need to use the correct file naming format from Firecapture or similar YYYY-MM-DD-TTTT for winJUPOS. Check Jupiter is the selected planet under program / celestial body Basically you have to load your image into the recording/image measurement tab. Align the outline with the planet in the adj tab. Use automatic detection under the outline frame tab. Then go to the pos tab and click the cursor on either end of the GRS. The longitude will be displayed at top left. Here is a link to some winJUPOS tutorials http://www.grischa-hahn.homepage.t-online.de/astro/winjupos/tutorials.htm Peter

Here is an image from the UK on 30th June. Hard to find a good focus, but managed to extract some detail. Maybe (blur) a dark flake on following end of GRS. The whole GRS well area looks very different to a month ago. As per the guidance on the BAA website I estimated the length of the GRS with WINjupos. CM2 longitude was 306.8 to 321.5 degrees = 14.7 degrees long x 1187 km/deg = 17449 km Peter

That is an excellent image of Saturn, Cassini division is nice and sharp. You did well with th ecurrent altitude

Hi Geoff A great image considering altitude this year, well done. Peter

ADC is essential with colour cam at this altitude. Peter

Yes agreed C14 is excellent as a planetary imager. However only when the seeing is good or better. Superb seeing is more dominant than aperture. Peter

Very nice image, even see the odd galaxy in the background. Peter

Good effort, about what you would expect given conditions and scope etc. Try some of the things Cosmic Jeff suggests such as cropping to increase the frame rate and an ADC helps although not fully at this low altitude. Usual workflow is to capture 7000-1000 frames, stack the best 30% in Astrostakkert, wavelet sharpen in Registax 6 and final tweak of colours, contrast and sharpening in Photoshop. Peter

That is an excellent image from the UK. Good detail visible in the belts and nice to see th emoons as well. Peter

Well done for trying, conditions are very challenging from the UK this year. Peter

That is very good for the UK. Can see all the main features and the shadow very well. Can't do much about the seeing apart from that airline ticket. Peter

A good effort all the same. Well done for trying. Peter

The other side of Jupiter under better seeing than we have had for a while, still boiling, wafting turbuence and very low down. ADC not strong enough at 15 degs to correct, so had to shift Red and Blue about 6 pixels in Registax to correct for dispersion. Peter

Wonderful display visible even in southern UK around 10pm on 21st June. Peter

Great result, well done. Any recognisable detail is a bonus from the UK. Peter

Well done, great result considering the altitude. Clouded out down here again...... Peter

Excellent image, almost as good as your C14 work. As you say, a great portable scope with fantastic performance. I upgraded from a C11 to a C14 just as Jupiter has been getting lower from the UK. My best ever shot of Jupiter is still with the C11 with better seeing. Peter

Great detail and processing. Nice to see the 'boring' side of Jupiter for a change. Peter

Thank you, better seeing at 23:44 even with a single stacked image outweighed the benefits of de-rotating several images under worse seeing. Peter

Just a single image, no combination with WinJUPOS. Peter

Gerat image and colour balance. Always hard low down. Peter

Poor seeing and thin cloud hampered capture, but still managed to get some detail of the GRS action at last. Peter

Great images.