Jupiter SEB revival spot

[chrisrnuttall]

hello all

here is a sketch of Jupiter from last night.

I observed from 21:30 to 22:30, and the sketch was made at 22:00 GMT.

Conditions were poor with Thursday's gusty wind still quite strong, the seeing was also poor with significant blurring of the image. Due to this there is not much detail in my sketch, and i would not have bothered had it not been for the outbreak.

The SEB was mid-grey, the revival spot was easy even in the conditions. It looked similar in size and colour to a ganymede transit, except it was softer around the edges, and showed some diagonal elongation. There was also very subtle white markings either side of the darker spot.

It is clearly growing quickly and seems to be creating / collecting dark material as it does so.

The NEB was very busy as usual and under better conditions would have been a joy to sketch.

Orion SPX 200. TV 11mm plossl. TV x2 barlow = 218X

CM1 23degrees

CM2 321 degrees

Mag -2.68

Dia 45"

Alt 28 degrees

[lukebl]

Great sketch! Just as I saw it at about the same time last night.

[barkis]

A very fine sketch considering you were battling the elements.

Lots of good detail, and another chapter logged in the resurgence of the SEB .

Ron.

[dweller25]

Great observation Chris. Fingers crossed - we will see a really interesting event soon.....

[beamish]

Nice one Chris ! Now the conds. here in Yorks have calmed down a lot might manage a butchers myself tonight .

[chrisrnuttall]

Hi Karlo

My house backs onto miles of utterly flat open fields, the wind has been coming straight off them and the first obstable it meets is me and my telescope! Nice!

You'd better check on win jupos first, I think the next favourable time is sunday night at about half ten from the UK

[Talitha]

Very nice, it looks like you were able to catch a lot of detail despite the conditions. I'm really confused about the appearance of the 'revival' spot, though... is it bright or dark? Everything i've read so far says it's a bright spot.

[chrisrnuttall]

Hello Carol

It definately started out as a bright white spot and I think that still exists, but it seems to have developed a grey outline, which has recently become stronger down the following side of the spot.

It is as if the intense energy in the spot is churning up darker material for us to see.

Due to the rather dodgy conditions i was observing in (200X was really pushing it) I was able to make out the darker stuff much more easily than the white spot itself, due to the darker material having better contrast against the still pale SEB.

If you have a look at ALPO japan's Jupiter section, the latest image from the 12th, which is by Marc Delcroix, is at almost the same time as my sketch and it shows the revival spot looking similar to mine but with the more conspicuous bright white spot preceeding the darker smudge. It seems i just couldn't make it out through the eyepiece.

It also shows that the left hand brown oval in the NEB is too near the limb in my sketch, but I'm not going to mention that if you don't mind!

[Venus_is_my_friend]

Good sketch! Do you use coloured pencils?

[chrisrnuttall]

hello Venus...

I used to use coloured pencils but now I mostly use chalky pastel pencils, blending stumps, and a pencil shaped eraser. I find they are easier to blend to get the colour right, and also to erase if I make a mistake or saturate an area too heavily.

best regards

[DarkerSky]

Magic Chris! Great capture of the events unfolding on Jupiter. The dynamical evolution of the spot and assoc. revival has me gripped!!

[Venus_is_my_friend]

hello Venus...

I used to use coloured pencils but now I mostly use chalky pastel pencils, blending stumps, and a pencil shaped eraser. I find they are easier to blend to get the colour right, and also to erase if I make a mistake or saturate an area too heavily.

best regards

It has a fantastic texture to it, great job again!

[Talitha]

Thanks for the info Chris, if these clouds ever go away i'll be able to take a look.

[chrisrnuttall]

Carol

get out and look ASAP. I was out again last night (14th) and the dark area had started to become S shaped as the winds between systems 1&2 shear it in different directions.

There's an image by lukebl from 18:00 tonight in the imaging section and it looks like the rate of change is accelerating to me, the dark sopt is spreading along the belt quickly, and there seems to be a new dark sopt next to it.

[Talitha]

Chris, email me a cloud filter ASAP.

I'll check out the planet images.

[chrisrnuttall]

how very frustrating for you!

I had a bit of a plan to go out tonight but it is raining here if that makes you feel any better?

[Talitha]

What'd make me feel a LOT better is a clear sky with above average seeing.

Really though, i'll be fine as long as everyone's sketches and images keep rolling in.