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By Cosmic Geoff
On 22 Oct I had a go at EEVA with the moons of Uranus, using my CPC800 and the ASI224MC (and flip mirror)
The image with about 5 sec exposure looked exciting, with several little dots in a line around Uranus's overexposed blob. But when I analysed it later I found that I had imaged several 13th mag. background stars, and noted Oberon as a definite ID and Ariel as possible. The seeing was bad.
The moons are clearly within the range of this setup, so I will try again sometime and see if I can secure a set of stackable images. The Sharpcap live stacking wouldn't work on this occasion.
I needed Calsky to identify and eliminate the background stars, but it unhelpfully notes the moons as 'beyond the range of amateur telescopes.' The Sky & Telescope tool identified the moons.
By Michele Scotti
i'd like to share with you the design, making and progress of a project my astro club endeavoring to. I'll post here relevant info in a run-up to where we got to so far.
Here is the mission: 800mm in diameter. That's it. A lot of inspiration out there but it needs to be able to do science. So it's a relatively fast Newtonian capable of tracking for tens of minutes.
So we realized that we were facing 2 projects in one. The mirror on one side and the mount on the other. Shall we start with the mount? What's the best compromise in terms of ease to build and cheap components and the chance to have a stiff yet light structure. An alt-az, like the biggest telescope! - or rather a glorified dobsonian in this case.
Any comment/suggestion is welcome!
As my GoTo is successfully finished (some cosmetic issues remain) I shoud focus my attention on planets' positions. I have proper source of information: fantastic book "Astronomical Algorithms" by Jean Meeus, thus I will sort the planets soon. But planets are not a challenge for me at this moment, they are just something obvious to do in my list.
I have another idea and ambitious plan for next project within the year: locating and tracking the ISS to be able to make a video of its fly, not only transition.
Similarly to other objects, I need some equations. I'm pretty sure they are available somewhere, because plenty websites or apps offer showing current position of the ISS.
I will use this topic for sharing a progress ot the project.
By Cosmic Geoff
An EEVA-style image of Saturn's moons. 14 July, 22:07 UT, taken with CPC800, ASI224MC +ADC.
Exposure 5 secs. The faintest moon visible is Encelasus, mag. 11.7
Next night I looked visually with an 8" SCT and could not make out any moons at all. Our Moon nearby was near full.
Saturn is severely overexposed in order to get the moons.