Jupiter 27 Sep 2011

[MarkS]

Here is Jupiter from the night of 27 Sep 2011 - well actually around 4am on 28th.

Imaging Source DBK21AU04.AS on Celestron C11 with x2 Barlow and IR/UV filter.
1800 frames at 7.5 frames/sec



This is far from being my best image but I suppose it does show what a difference the seeing makes.  Unfortunately I completely missed a period of excellent seeing because of a string of technical issues caused by low leisure battery voltage.

The black spot is the shadow of Io.

Mark

[Rocket Pooch]

Hi Mark,

It look a little saturated in the middle? Shame you missed the good seeing, but no hurricanes on the way for a while, there's nothing here at the moment, maybe you will get another go soon.

Chris

[Mac]

nice image,

looks like everyone is having their fair share of gremlins at the moment.

Mac.

[MarkS]

It look a little saturated in the middle? Shame you missed the good seeing, but no hurricanes on the way for a while, there's nothing here at the moment, maybe you will get another go soon.

It does have the appearance of being saturated - I wonder if I had the exposure setting too long (even though I left the gain too low)?  I'll check this on tonight's run.  It certainly does lack contrast for some reason.

I had another go last night but this time there were no periods of excellent seeing.  The main problem at the moment is that although the planet and the bands look stable, they never seem to properly "focus" - a phenomemon described by Damian Peach where there is high level extremely fast "flutter". 

You can find his excellent article where he mentions this, here:
http://www.damianpeach.com/images/articles/predictseeing/JBAA%20116-1%20Peach.pdf

Mark

[RobertM]

It may not be up to your high standards Mark but it's still miles better than anything I've ever done !

That focus problem you mention is all I get, almost a bubbling but much faster which means that focusing is a nightmare.

Robert

[The Thing]

I had another go last night but this time there were no periods of excellent seeing.  The main problem at the moment is that although the planet and the bands look stable, they never seem to properly "focus" ...

Mark

Exactly the problem I had last night. Also there seemed to be a lot of heat turbulence, particularly over neighbouring roofs. Presumably they were radiating the days warmth. Not a problem you have in High Halden.

[MarkS]

Also there seemed to be a lot of heat turbulence, particularly over neighbouring roofs. Presumably they were radiating the days warmth. Not a problem you have in High Halden.

In Sidcup I used to get the probelm of turbulence from warm roofs (in Summer) and central heating flues (in Winter).  Not a problem here

[mickw]

Nice capture, I like the shadow

[PhilB]

In Sidcup I used to get the problem of turbulence from warm roofs...

Tell me about it! Warm roofs are causing me no end of trouble with Jupiter at present - hence no images

Nice image, shame Io was too far off the frame to be included also.