Huge NEB Wake
Posted 21 November 2012 - 10:43 AM
Apparently the GRS was just over the preceding limb. At first glance, I was aghast of the varying tones in the SEB. Especially one very prominent bright streak that appears to be the tail end of the GRS wake. Both north and south edges were much lighter with brighter areas stretching along both borders. The center was a nice ruddy hue with variations in that, as well.
The EB is abuzz with festoons, white features, and an Eq belt. The NEB is sporting what looks like a barge.
There is even that rare splotch floating just below the polar darkening in the normally barren northern temperate zone.
But, the showcase feature is a huge rift in the NEB. It looks to rival the great wake following the red spot. I mean it is prominent, thick, bold, and bright. And it stretches nearly the length of the disc. It seems to originate near a prominent festoon, then trail off into the NEB. It resembles very much the GRS and it's wake in both size and sheer boldness.
Posted 21 November 2012 - 11:57 AM
What is the rift like, a ribbon of whiter gases splitting the brown/gray NEB?
Posted 21 November 2012 - 12:51 PM
Posted 21 November 2012 - 01:45 PM
Absolutely. I've seen and sketched parts to the NEB and its rifts, but this part I don't think I've seen. I was stunned, actually, at how prominent it was. Wonder if any imagers captured it. Lemme check ALPO.
David, same here. A joy to behold. Just so much to see lately.
Edit: Here's one image at CM 277 showing the rift. If so, then I have seen this one. But this image is 3 days old. Either I am absolutely insane or that rift has grown beyond recognition. I hope the latter.
Posted 21 November 2012 - 03:33 PM
This sounds very cool. Looking forward to seeing this. The NEB revival this apparition is proving to be most interesting. It also is interesting that you saw a barge as well. I haven't seen any so far this apparition and was actually wondering if the absence of barges was part of a NEB revival in it's earlier stages.
In John H. Rodgers book, " The Giant Planet Jupiter", he writes, " Rifts in the NEB are white spots or streaks near the middle of the belt. They are often small and have varied, rapidly changing shapes, with detail at the limit of resolution". Later he states, " They clearly represent vigorous turbulence in the cyclonic region of the NEB." And later he adds," But longer rifts have in recent years been tracked for several months,gradually lengthening and continually producing new small white spots within their turbulent borders."
This book is very informative. Goes into great detail about the planet. I highly recommend it.
Thanks for the heads up. Dean
Posted 21 November 2012 - 04:23 PM
Posted 21 November 2012 - 10:02 PM
Yea, I'd be interested to know whether I am totally insane or actually witnessed a significant change in that rift. If either of you report it, cool, but I might try to sketch it soon, too. (In fact, I did a sketch...unfinished.)
One can imagine to change rapidly on that scale they would be very active regions. But, that makes sense, Jupiter spins wildly and probably churns gas much like mother in law's cooking does.
Posted 21 November 2012 - 11:38 PM
It's not rotated enough to capture the NEB rift, that's just over the trailing limb.
Here the rift at exactly the same longitude I observed it. It has changed, it looks broader and longer. It also shows the barge like feature, the long blotch in the north, and hints at the detail visible in the SEB, including that white streak jetting northward on the meridian.
Posted 22 November 2012 - 12:49 AM
Posted 22 November 2012 - 01:51 AM
Something tickled my retina down in that area the other night. Thought it might have been a white oval. Not here, but south at the GRS longitude. Hmmm...
Posted 22 November 2012 - 09:42 PM
Posted 22 November 2012 - 10:53 PM
Posted 23 November 2012 - 12:06 PM
Began observing at 1430UT. The rift encroached the trailing limb by about 1500UT. At 1630UT it had touched the meridian and was still coming.