Jupiter last night with black spot

[Startrek]

Imaged Jupiter last night at around midnight and after processing this morning noticed a large black spot in the southern polar region
Any ideas what it might be ? A huge storm maybe ??

6” f6 newt on HEQ5
Canon 600D with a 4 x Televue Powermate
Captured on BYEOS Planetary mode with 5 x zoom to get close to 1:1 pixel resolution ( 1500 frame AVI video file )
ISO800 exp 1/80
Stacked in Autostakkert 3
Processed in Registax 6

Thanks for looking

[Saturnine]

Hi Martin
That black spot would have been the shadow transit of Ganymede which started at 21:41 to 23:55 EST.
The seeing was average early in the evening but improved after midnight for a few hours before turning for the worse a few hours before dawn.

[mental4astro]

Yup, a shadow transit of Ganymede. I too saw it last night.

[AstralTraveller]

+1

[Startrek]

Thanks Guys
Thought I had discovered a new phenomenon on Jupiter , wishful thinking
As Ganymede is only small you wouldn’t think it’s shadow would be so huge on the planets surface considering the shadow is cast through the vacuum of space.The shadow size must be accentuated by our own atmospheric dispersion or similar
Cheers

[Paulyman]

You can see Ganymede just off the bottom right I think, the stacking of Jupiter looks like it streaked the moon and the shadow too I guess?

[Startrek]

Paul
Your spot on
I took 4 off 1500 frame videos about 5 mins apart, this one was the best of them
Planet was jumping around to much
If I waited another hour when it was up near the zenith then things might have been a tad better , too tired so packed it in for the night around midnight

It’s a learning curve this planetary imaging but I think I’m getting somewhere with it

Thanks

[astronobob]

Very good for 6" aperture Martin.
Do you use or have photoshop at all ?

[Startrek]

Thanks Bob
I took a single image of Jupiter nearly 2 years ago up near the zenith in winter and it was really sharp, without any processing.This little newt is a winner !

I don’t use photoshop for AP
Registax 6 for lunar and planets
Startools for DSO,s

Cheers

[xelasnave]

I have often said not to underestimate the ability of a six inch Newtonian telescope...
You back me up in spades.
Nice image. Great capture well done.
Alex

[Startrek]

Alex
Thanks so much and yes you have always said the 6” newt is a great scope !!
I always manage to snag a good image either DSO, planetary or lunar from the 6”
Cheers