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Saturn Feb 15th, spot, hex, vortex.

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#1 Kecktastic

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Posted 16 February 2013 - 05:40 AM

Hi All,

Imaged Saturn this morning in reasonable seeing. Of interest in my 742nm IR data, is what I believe to be, the vortex within the Hexagon at the North pole. It is in all three of my IR data sets.

Each IR image is made from two consecutive 3 min IR captures derotated and combined in WinJUPOS, the 1 min between them means each IR image here is captured over a 7 min period. There is just over 1 hour between the mid point of my 1st & 3rd IR images and while the vortex is most prominent in the 1st image, it is also visible in the other two as well.

Also of interest in both my RGB & 742nm IR data is a quite prominent dark spot. I measure its position to be at L3 333.2 Lat +46.9.
There are also some diffuse bright spots in the NEB, the dark spot comes up very well in my animations of both IR & RGB data.

Interestingly the dark spot, which is also visible in my IR & RGB polar projection maps, lines up very nicely with one the the hexagons vertices in the 1st IR polar map at approx 333 Sys III. The rotation of the spot in Sys II makes for a nice comparison with the hexagons Sys III rotation when considering a comparison with these movements over the approx 80 minutes covered by this data.

Thanks for looking.

Regards
Trevor

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#2 Kecktastic

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Posted 16 February 2013 - 05:43 AM

742nm IR map

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#3 Kecktastic

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Posted 16 February 2013 - 05:44 AM

RGB

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#4 Kecktastic

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Posted 16 February 2013 - 05:44 AM

RGB map

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#5 Kecktastic

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Posted 16 February 2013 - 05:46 AM

742nm IR animation

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#6 Kecktastic

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Posted 16 February 2013 - 05:47 AM

742nm IR map animation

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#7 Kecktastic

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Posted 16 February 2013 - 05:48 AM

RGB animation

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#8 Kecktastic

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Posted 16 February 2013 - 05:48 AM

RGB map animation

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#9 Mitchell Duke

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Posted 16 February 2013 - 06:27 AM

Wow thats an amazing animation of the pole! The vortex is resolved very nicely.

#10 Space Cowboy

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Posted 16 February 2013 - 07:04 AM

Great work Trevor! Spectacular pole animation!

#11 mitovka

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Posted 16 February 2013 - 07:29 AM

Amazing job Trevor.

#12 Timthelder

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Posted 16 February 2013 - 09:10 AM

Some absolutely fantastic work Trevor!

The dark spot is jumping right out there. I wonder if it could actually be a left over from a missed strike? (although I don't know how it would be missed as many eyes as there are on Saturn ATM.)

It will be interesting to see how image details develope as Saturn nears opposition.

Cheers, Tim

#13 Sunspot

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Posted 16 February 2013 - 09:14 AM

Trevor,

Outstanding set of images!

Paul

#14 ToxMan

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Posted 16 February 2013 - 09:22 AM

Beautiful...lots of wonderful features...great data!

Thanks for sharing, Trevor.

#15 lcd1080

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Posted 16 February 2013 - 10:52 AM

Trevor that vortex is spot on!

Pete

#16 sfugardi

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Posted 16 February 2013 - 01:58 PM

Trevor, top shelf resolution! Impressive set, every image. Congradultations and thanks for sharing your excellent work.

Regards,
Steve

#17 ZielkeNightsky

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Posted 16 February 2013 - 02:31 PM

Trevor, another fantastic set of images. The IR nicely show the vortex and the hexagon shape is pretty well defined.

The spot is also well defined and shows really nicly in the animations.

Another beautiful set of good data.

#18 Az Frank

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Posted 16 February 2013 - 05:18 PM

Congrats Trevor! Amazing images and animation capturing the hexagon as well as the vortex. I knew the best was yet to come and probably more yet!

#19 Freddy WILLEMS

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Posted 16 February 2013 - 07:54 PM

Amazing nice processed Trevor.

#20 Tassydevil

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Posted 16 February 2013 - 11:38 PM

Great work Trevor.

#21 Kecktastic

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Posted 17 February 2013 - 05:13 AM

Thanks Mitch but the most interesting thing I nearly missed. Only picked it up after I uploaded my data. Have a look at the first IR image, there is a tiny but quite bright spot close to the CM but far South, on the edge of the polar region. It is easily seen in the IR animation, have measured it to be at L3 318.9 Lat +67.4, it can be seen in the IR maps when you know where to look and is well seen in the IR map animation. In all the years I have been imaging Saturn for Cassini RPWS I have not seen a feature like that so close to the polar region.

Thanks Stuart, certainly a lot happening in the animations.

Thanks Michal, appreciate your comment.

Thanks Tim, I believe the dark spot is a long lived feature, reckon I have imaged it previously. There has been conjecture that SED's associated with The Great Storm may have produced some carbon and that it could possibly in relatively significant volume, I guess more analysis with the suite of instruments on Cassini may help determine that.

Thanks Paul M. and congratulation also on your latest Saturn images.

Thanks Paul for you kind words.

Thanks Pete, toward the end of this imaging session Saturn had exceeded 70 degrees alt which obviously helps considerably.

Thanks so much Steve, although I still have not had, what I would call good seeing, I was quite pleased with this result.

Thanks Lars, when I was walking down to my observatory the stars all looked quite steady and I had high expectations, the reality when looking at the live feed to my computer screen was a little different, very fast seeing but it still produced an acceptable result.

Thanks Frank, large aperture, quality optics, high alt and reasonable seeing means good results. When I do get some good seeing I have very high expectations of the data it will produce.

Thanks Freddy, hope your relocation is going well.

Thanks Graeme, reckon Saturn is so high now you should get a great look at it even down in Tassie.

#22 Space Cowboy

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Posted 17 February 2013 - 11:16 AM

Trevor how did you do the north poler animation so that the planet rotates but the "segment" stays static? I can only animate the segment increasing in size with the planet static. :question:

#23 Rankinstudio

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Posted 17 February 2013 - 11:25 AM

Beautiful set of images. I would say you nailed the polar hexagon and the vortex. Amazing.

#24 Kecktastic

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Posted 18 February 2013 - 04:02 AM

Hi Stuart, have sent off a PM, probably a bit too extensive to add here, it ran to over a page on my word processor, hope it answers your question.

Thanks David, I only used 40% of the data for each channel but reckon it came up ok.






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