Saturn Feb 1st, spots & polar storm
#1
Posted 03 February 2013 - 01:12 AM
Imaged Saturn Feb 1st in variable seeing, the best of it being quite reasonable. I noted the recent message circulated by John Rogers to our group regarding the hexagonal polar storm imaged quite nicely by Darryl. Through 2012 as the Nth pole became more visible this polar storm started to show up, particularly at 807nm IR although it was also visible in some R and RGB data. I am confident that a search through the PVOL data base would reveal many examples of it. I have never previously seen a polar map of it though, it has never really been a priority for our work with Georg and the RPWS data. Having said that I have attached a polar map from one of my RGB data sets for Feb 1st and clearly the hexagon can be seen. The hexagon can also be seen in the individual RGB & 742nm IR images. I have also attached an animation of 3 RGB data sets that covers the rotation over a 35 min period, I note that this animation reveals a few degrees rotation of the hexagonal polar storm.
Probably of greater interest to our RPWS work are some interesting details in the NEB. In the animation is a well defined spot mid way through the NEB, just to the Preceding side of the CM and moves toward the "P" limb. Also at a similar latitude in the NEB but starting from back toward the Following limb and moving toward the CM is another reasonably bright feature, however it seems to be more stretched out rather than just a spot.
Regards
Trevor
#6
Posted 03 February 2013 - 01:56 AM
#7
Posted 03 February 2013 - 02:38 AM
#8
Posted 03 February 2013 - 07:16 AM
#9
Posted 03 February 2013 - 07:19 AM
#10
Posted 03 February 2013 - 08:21 AM
I am confident that a search through the PVOL data base would reveal many examples of it. I have never previously seen a polar map of it though, it has never really been a priority...
I'm certain you are correct. When I brought the hexagon feature to Darryl's attention a few days before he posted a better image of it, I thought of the hexagon as another feature we could strive to resolve. And, the significance would come at a later date. It's the first time we (amateurs) have had scopes, cameras, techniques and Saturn's tilt to get a "look" at it.
Very nice presentation, Trevor.
Hope the heat isn't drying you up and blowing you away, like a tumbleweed. You folks "down under" are really taking a "solar beating."
Paul
#11
Posted 03 February 2013 - 10:18 AM
#12
Posted 03 February 2013 - 10:53 AM
Pete
#13
Posted 03 February 2013 - 01:07 PM
#14
Posted 03 February 2013 - 01:11 PM
Fantastic images and a really nice animation. Thanks for giving us a look.
#15
Posted 04 February 2013 - 03:59 AM
Appreciate your comment Sam.
Thanks Mitch, in a few more years as the ring tilt opens wider the entire polar region containing the hex will be available to us.
Thanks Paul, in another 15 years we will be getting a similar view of the South Polar region to what we are currently seeing with the North Pole. I suppose, with an orbit of close to 30 years it takes a bit of time to see all the faces of Saturn but see them we will, well I will if I live long enough. Imagine what sort of equipment might be available then.
Thanks for the kind words David.
Thanks Pete,I derotated the R's from each set to create a new & improved R, did the same with the G & B data then merged them by derotating the new R, G & B to create the final image.
Thanks Frank, sadly I would have to agree that this is my best thus far for this apparition, however the seeing was quite variable with the best of it quite nice but rather a lot of very ordinary stuff mixed in with it. It would be great to get some good seeing to take full advantage of the really nice alt rather than be over processing marginal data to get a fair result.
Thanks Paul, yep, sure has been warm out in these parts of late but Saturn is rising higher and higher and for sure the weather will become milder and bring with it better imaging conditions.
#18
Posted 04 February 2013 - 08:56 AM
any good beer out there?? LOL
Great images Trevor, always good to see work from you!!
#19
Posted 04 February 2013 - 09:07 AM
#20
Posted 04 February 2013 - 01:32 PM
ZZ I do not believe you...
#21
Posted 04 February 2013 - 03:00 PM
#22
Posted 04 February 2013 - 10:13 PM
Jason W. Higley
#23
Posted 05 February 2013 - 07:01 AM
Thanks ZuoZhao, based on the fine Jupiter's you have been posting it would likely only be the lower alt of Saturn that would be causing you a problem. As a matter of interest what alt is Saturn rising to for you?
Thanks Michal, I appreciate your comment.
Right on the money Freddy, as the tilt increases imaging the hex will be as commonplace as capturing the CD.
Thanks Jason, not sure about the animation. Darryl's Polar projection map, is for sure the first I have seen showing the hex so nicely, well at all really. I have always been big on animations, you could check that out on my website or the animations section of the PVOL data base. With Saturn I think it helps to better reveal the type of storm structure that my researcher is interested in. In this instance the straight edges of the hex are also well defined and rotation of it is quite apparent.
#24
Posted 05 February 2013 - 08:16 PM
Glenn
#25
Posted 06 February 2013 - 02:38 AM