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What is this dark streak on Jupiter?

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#1 Michael Covington

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Posted 19 June 2019 - 11:22 PM

I just photographed Jupiter, intending to record the shrunken Red Spot, and noticed a very unusual dark streak north preceding it.  Images below (one of them overprocessed):

20190619-Jupiter-GRS-streak.jpg

 

2019-06-20-0346_1-RGB-Jup_AS_P75_lapl6_ap8-RS-overprocessed.jpg

 

Best 75% of about 3000 images, Celestron 5 (vintage 1980), 3x extender, ASI120MC-S camera, AutoStakkert, RegiStax, Photoshop.

 

Has there just been an impact or something?

 

Despite the copyright notice, feel free to pass this picture around, with acknowledgment, for scientific discussion.  In the past I've had an "artist" steal some of my images, so now they almost all have copyright notices.


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#2 Michael Covington

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Posted 19 June 2019 - 11:38 PM

Answer (from Christopher Go via Facebook):  It has been there for some time and seems to be associated with the unusual activity around the Red Spot.

 

That doesn't really mean anybody knows what it is, but I'm not the discoverer.


Edited by Michael Covington, 19 June 2019 - 11:38 PM.

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#3 J A VOLK

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Posted 19 June 2019 - 11:50 PM

I have just been observing with my FS-152 - I can see the spot at the end of the streak you show, but not clearly the streak. The spot is quite dark visually. Seeing is fair, but Jupiter is only 24 degrees elevation.
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#4 chuckles

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Posted 19 June 2019 - 11:59 PM

Ive seen some mentions of it on here but hadn't seen it till tonight. It really stands out. I mistook the part closest to the red spot for a moon shadow at first, but after a while it was obviously a band with a bend near the red spot. It seems hooked a little right at the end too. Im interested to hear if anyone knows more.
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#5 J A VOLK

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Posted 20 June 2019 - 12:02 AM

Ive seen some mentions of it on here but hadn't seen it till tonight. It really stands out. I mistook the part closest to the red spot for a moon shadow at first, but after a while it was obviously a band with a bend near the red spot. It seems hooked a little right at the end too. Im interested to hear if anyone knows more.

agreed - the dark spot near the red spot looks like a small transit shadow
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#6 Astrolite

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Posted 20 June 2019 - 12:21 AM

There is some good info on the GRS and the observed changes in this Sky & Telescope article.

 

 https://www.skyandte...&bid=1199909808


Edited by Astrolite, 20 June 2019 - 12:22 AM.

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#7 antariksha

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Posted 20 June 2019 - 12:37 AM

On night of 28 May, I did my most recent viewing of Jupiter and many other things. Based on viewing , seeing conditions that night, I could go to 370X magnification on my 18" telescope. Got a descent view of Jupiter, with Ganymede shadow passing over Jupiter, GRS was crisp. I did view the black streak close to GRS. There is similar structure on the left of GRS which ends below GRS in above photos. The streaks when I viewed, were a bit more crisp and sharp ( especially the one below GRS). Some expert in Jupiter and planetary research, can tell us more about this new pattern. By the way, I noticed, GRS itself has become deep Red in its central portion. Has anyone noticed it?


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#8 Tulloch

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Posted 20 June 2019 - 03:20 AM

Hi there, there have been lots of discussions on this forum.

https://www.cloudyni...ing-processing/

 

Some of the best images here

https://www.cloudyni...ter-2019-06-15/

and

https://www.cloudyni...jove-june-12th/

and many more smile.gif

 

Andrew


Edited by Tulloch, 20 June 2019 - 03:22 AM.


#9 CPellier

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Posted 20 June 2019 - 03:33 AM

This is the jet-stream edge of the SEB deflected north by the GRS, with a darker knot in it, probably because one of the jet spot is passing there. But nothing unusual and not an impact.


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#10 Miranda2525

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Posted 20 June 2019 - 09:06 AM

That's quite interesting!  I will be watching when skies permit.



#11 BradFran

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Posted 20 June 2019 - 11:55 AM

Time to rewatch 2010 grin.gif



#12 parebal0

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Posted 20 June 2019 - 12:49 PM

I fInally had an opportunity to observe the dark spot last night.  Crappy Atlanta weather prevails.  It was very small, smaller than an Io shadow transit, and first thought it was a pesky eye floater.  Would estimate to be about .3 arc seconds.  Could not really observe its associated dark, trailing band.   I did also observe the central part of the GRS, looking deeper orange in color.  Peter A.



#13 Magnetic Field

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Posted 20 June 2019 - 01:20 PM

I fInally had an opportunity to observe the dark spot last night.  Crappy Atlanta weather prevails.  It was very small, smaller than an Io shadow transit, and first thought it was a pesky eye floater.  Would estimate to be about .3 arc seconds.  Could not really observe its associated dark, trailing band.   I did also observe the central part of the GRS, looking deeper orange in color.  Peter A.

With your Questar if I may ask?



#14 parebal0

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Posted 20 June 2019 - 10:55 PM

With your Questar if I may ask?

Didn’t have the Q out last night, but doubtful I would have seen it with the Q.  Evo 9.25 was scope in use.  Q does not get too much use anymore, as I’m its original owner since 1975, and was my only scope until 2 years ago.  




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