天王星 ALPO-Japan Latest
Uranus Image 2012/10/12(UT)
Stanislas Maksymowicz (250mm)|
At last a hole into the clouds for making this report about Uranus.
I engaged a new 250mm scope for getting a compromise with the seeing and
the resolution ability.
It has a proven strehl ratio of 0.966 global on the tube, the central
obstruction needs to be deducted for getting a true equivalent perfect
diameter of 168-170mm approaching the cassegrain 305mm performance.
Therefore the contrast levels are almost similar.
Last evening was average and in spite of this, during calm times (7/10
images) I could drawn the attached report for your perusal. It should
interresting to compare with some other documents issued on the site (the
oval brigthening near the limb in the south temperate belt).
The weather being stormy here it is difficults to perform better.
Have good receipt of the present mail.
[Stanislas Maksymowicz Ecquevilly,France]