Io Transit near opposition
Posted 04 December 2012 - 10:49 AM
Posted 04 December 2012 - 11:43 AM
Posted 04 December 2012 - 03:20 PM
Posted 04 December 2012 - 05:34 PM
Thanks for posting.
In fact there is a big "debate" on the Solar System and Lunar observing post regarding reports of seeing Io as a "football" and your image shows this beautifully.
I had reported seeing albedo features on Io visually a couple of weeks ago and mentioned that it gave Io the look of a tiny yellowish pearl.
Someone else that may have been somewhat skeptcial later saw (to his admitted surprise) the exact same effect using a smaller scope.
And someone else reported seeing Io as looking a bit stretched out using an even smaller scope and the scope itself was small enough that the feat seemed to some unlikley.
But your image shows perfectly what I reported, and in that thread, I have used it as evidence that suggest that even in a small aperture, diffraction of this bright central band displayed in your picture could explain how someone with a very small scope could actually see Io as being slighly out of round.
So, linked to your picture and greatly appreciate you posting it.
I constantly refer to the previous nights images afer a session to confirm my observations, and someone else had posted a similar picture showing the north and south limbs as being lower in contrast than the cental equitorial region, and your picture shows this oh so beautifully.
Thanks for posting. A great image and just in time for the other thread!
Posted 04 December 2012 - 09:01 PM
Posted 05 December 2012 - 11:48 PM
I don't want hijack your thread, I wasn't going to post this image... I shot it with the 10" on 11/30, the night before I shot the ISS. I just want to show that the shadow of Io has shifted sides. Wish I'd had the camera on the C14 now!
Posted 06 December 2012 - 07:57 AM
And I like the comparison image, Tim - very cool to see the switch.
Posted 06 December 2012 - 12:39 PM