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Jupiter's Great Red Spot is evaporating. Your chance to observe it happen in a larger telescope.

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#1 Magnetic Field

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Posted 22 May 2019 - 06:52 AM

The Great Red Spot (GRS) is undergoing a makeover:

 

https://spaceweather...pot-unraveling/

 

 

And this is the NASA press release (although this is not new news):

 

https://www.gemini.edu/node/12679

 

 

I think this could be a worthwhile undertaking to observe the GRS this June/July/August with one of your larger telescopes (e.g. 8" SCT and above).***

 

 

***The question is not if you can see the GRS in your tiny 4" apo (or my tiny Vixen VMC 110L); the question is can you see the outflowing streamer gas? I think this calls for a larger telescope (jibe: your contrast myth in your 4" apo doesn't help in real live).

 

 


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#2 Sam M

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Posted 22 May 2019 - 07:50 AM

I noticed that two weeks ago.  It was the first time I'd seen the GRS this year.  I was wondering if it was a change, or just my view that night and faded memory.


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#3 Jon_Doh

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Posted 22 May 2019 - 07:50 AM

My 140 refractor shows more detail on Jupiter than my 8" SCT ever did.  


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#4 Magnetic Field

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Posted 22 May 2019 - 08:31 AM

I noticed that two weeks ago.  It was the first time I'd seen the GRS this year.  I was wondering if it was a change, or just my view that night and faded memory.

I missed this yesterday.

 

But people are already aware of the phenomenon:

 

https://www.cloudyni...u/#entry9381457



#5 Bill Barlow

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Posted 22 May 2019 - 10:09 AM

Interesting, I haven’t observed Jupiter since last year, so will try and see this soon.  Might use my new 8” Meade SCT.

 

Bill



#6 Dave Mitsky

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Posted 22 May 2019 - 01:04 PM

I saw the Spaceweather article yesterday.  There's an S & T article on the topic at https://www.skyandte...-in-your-scope/

 

Dave Mitsky

 


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#7 Dave Mitsky

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Posted 22 May 2019 - 01:07 PM

A recent image of the GRS is posted at http://www.acquerra....20190522-144006


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#8 dscarpa

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Posted 22 May 2019 - 04:59 PM

 I was able to see the ring around the GRS and the streamer coming off it in my WO ZS110, IM715D and C9.25 using  275X-350X during  very good seeing  several times this year. They are dark so they're not that hard to see.  Way too many clouds here recently hoping they clear up soon! David


Edited by dscarpa, 22 May 2019 - 05:01 PM.

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#9 David Gray

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Posted 22 May 2019 - 07:36 PM

A detailed/learned account here...........http://alpo-j.asahik...19/j190522s.htm

 

               .............................................................................................................................................

 

 


Edited by David Gray, 23 May 2019 - 12:11 PM.

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#10 REC

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Posted 23 May 2019 - 10:55 AM

I saw the Spaceweather article yesterday.  There's an S & T article on the topic at https://www.skyandte...-in-your-scope/

 

Dave Mitsky

 

Good article. Hope we get some nice seeing months to check it out. June is usually a bad weather month and it's already starting early here in NC.



#11 Matt78

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Posted 23 May 2019 - 11:11 AM

The Great Red Spot (GRS) is undergoing a makeover:

https://spaceweather...pot-unraveling/


And this is the NASA press release (although this is not new news):

https://www.gemini.edu/node/12679


I think this could be a worthwhile undertaking to observe the GRS this June/July/August with one of your larger telescopes (e.g. 8" SCT and above).***


***The question is not if you can see the GRS in your tiny 4" apo (or my tiny Vixen VMC 110L); the question is can you see the outflowing streamer gas? I think this calls for a larger telescope (jibe: your contrast myth in your 4" apo doesn't help in real live).


Sadly, some of us don't have 8" scopes. It's not necessarily a matter of our views on the merits of apos, so much as our economic means... We'll just have to ready plenty of spinach, pump up the mag, squint, and hope.
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#12 Magnetic Field

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Posted 23 May 2019 - 11:46 AM

Sadly, some of us don't have 8" scopes. It's not necessarily a matter of our views on the merits of apos, so much as our economic means... We'll just have to ready plenty of spinach, pump up the mag, squint, and hope.

Why not observe the GRS  with your 5" Nexstar? 5" is already a capable instrument size and similar to a 80 or 90mm apochromat..

 

Your Maine is approx 45 degrees latitude and Jupiter is 5 degrees or more higher in the sky than in the UK. Definitely worth observing it with your Nexstar.

 

Btw: My 8" SCT minimum aperture was taken out of thin air.

 

Edit: here you get GRS transit times. Note: the times are in UT (Universal Time) and you have to convert it into your time (for Maine you subtract 4 hours from the UT time to get the time in your local time):

 

https://www.projectp...eve_grs.htm#aug

 

Or if you have got say SkyChart installed klicking on Jupiter will open a pop up window with some GRS transit information (in your local time).


Edited by Magnetic Field, 23 May 2019 - 12:17 PM.


#13 NorthernlatAK

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Posted 23 May 2019 - 11:48 AM

Sorry guys, I misused my zarkov cloud gun and really screwed things up! Please don't be mad, I'll try to fix it...
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#14 Magnetic Field

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Posted 23 May 2019 - 11:59 AM

Sorry guys, I misused my zarkov cloud gun and really screwed things up! Please don't be mad, I'll try to fix it...

I just typed it into google.

 

Is this a joke (not your post) or the remnants of a 1st April's fools joke: the Zarkov Cloud Gun?



#15 NorthernlatAK

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Posted 23 May 2019 - 12:02 PM

I wondered the same thing for awhile but the reviews are to die for... still haven't got a staight answer.

Edited by NorthernlatAK, 23 May 2019 - 12:05 PM.


#16 Magnetic Field

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Posted 23 May 2019 - 12:16 PM

I wondered the same thing for awhile but the reviews are to die for... still haven't got a staight answer.

I think I rather pray for better weather.



#17 Matt78

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Posted 23 May 2019 - 12:37 PM

Why not observe the GRS with your 5" Nexstar? 5" is already a capable instrument size and similar to a 80 or 90mm apochromat..

Your Maine is approx 45 degrees latitude and Jupiter is 5 degrees or more higher in the sky than in the UK. Definitely worth observing it with your Nexstar.

Btw: My 8" SCT minimum aperture was taken out of thin air.

Edit: here you get GRS transit times. Note: the times are in UT (Universal Time) and you have to convert it into your time (for Maine you subtract 4 hours from the UT time to get the time in your local time):

https://www.projectp...eve_grs.htm#aug

Or if you have got say SkyChart installed klicking on Jupiter will open a pop up window with some GRS transit information (in your local time).


Oh I will observe it! I was just being a bit snarky/facetious, perhaps. However, I'll probably need to eat my spinach and squint really hard...

#18 Matt78

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Posted 23 May 2019 - 03:16 PM

Sorry guys, I misused my zarkov cloud gun and really screwed things up! Please don't be mad, I'll try to fix it...


You'd better! We're having some really cloudy weather down here in Maine, no thanks to you.

#19 AxelB

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Posted 23 May 2019 - 09:13 PM

No amount if spinach and squinting will pierce through the « perma-clouds" that plagues my area these days... weeks... months!

#20 Matt78

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Posted 24 May 2019 - 08:47 AM

No amount if spinach and squinting will pierce through the « perma-clouds" that plagues my area these days... weeks... months!


Try kale

#21 jrbuchanan

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Posted 24 May 2019 - 04:40 PM

I took this picture last night and it clearly shows the Great Red Spot unraveling.  I took this on a Celestron NextStar 6se and a ZWO asi 224 camera.  

 

 

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  • 01_16_15_pipp_g5_ap37_Drizzle30.png

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#22 Rich (RLTYS)

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Posted 25 May 2019 - 07:30 AM

Impressive. waytogo.gif



#23 BradFran

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Posted 25 May 2019 - 08:55 AM

Sorry guys, I misused my zarkov cloud gun and really screwed things up! Please don't be mad, I'll try to fix it...

You're not supposed to put the Zarkov in your focuser and aim it at anything. Didn't you RTFM before pulling the trigger? A collimated Zarkov beam is virtually unstoppable! Geez. We won't get another red spot like that for at least... what... a thousand years?


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#24 NorthernlatAK

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Posted 25 May 2019 - 01:45 PM

You're not supposed to put the Zarkov in your focuser and aim it at anything. Didn't you RTFM before pulling the trigger? A collimated Zarkov beam is virtually unstoppable! Geez. We won't get another red spot like that for at least... what... a thousand years?

I should be able to switch the battery around and the spot should hold hopefully. But first I need to bust my "local" cloud layer to see it first. Then I'll switch polarity. It'll probably make it rain after I do this so someone will need to confirm I nailed the spot.
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#25 Special Ed

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Posted 26 May 2019 - 08:15 AM

I took a look at Jupiter this AM between 3:45 and 5:00 local time (26 May 0745-0900 UT).  Jupiter was over an hour past culmination and dropping in altitude rapidly but this was when the GRS was in view.  Seeing was below average so the ADC wasn't as much help as it usually is. 

 

Using 163x, 196x, and 233x, the GRS appeared very red and slightly elongated towards the preceding side but I couldn't really see any detail.  The clouds surrounding the RSH and preceding the Spot itself were hard to detect--again the seeing. The turbulence immediately following the GRS made that part of the SEB appear white or bright.  The STrZ following the GRS appeared broad. 

 

I tried a W80A filter which improved the contrast of the GRS but the seeing overwhelmed any advantage there so no further detail seen.  By now Jupiter was down to 20 degrees altitude and the seeing was worsening so I packed it in.  I didn't attempt a sketch.




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