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Pages: 1 Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Uranus October 28       #5555554 - 12/05/12 12:04 PM Edit   Reply   Quote Quick Reply   Hi all, Not much to look at, but here is an RGB image of Uranus from October 28. http://www.sunspot51.com/OuterPlanets/Uranus/u2012-10-28_03-46_RGB_pmax.jpg Paul Post Extras:       dickbill professor emeritus Reged: 09/30/08 Re: Uranus October 28 [Re: Sunspot]       #5555688 - 12/05/12 01:29 PM Edit   Reply   Quote Quick Reply   nice, a band is visible. But the red edge? Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: Uranus October 28 [Re: Sunspot]       #5555724 - 12/05/12 01:53 PM Edit   Reply   Quote Quick Reply   How do you place the rotation axis of the planet? I have some idea about but needs to be confirmed. Stanislas-Jean Post Extras:       Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Re: Uranus October 28 [Re: stanislas-jean]       #5556202 - 12/05/12 06:59 PM Edit   Reply   Quote Quick Reply   I matched the orientation to the moons. Thanks!! Paul Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: Uranus October 28 [Re: Sunspot]       #5556790 - 12/06/12 01:54 AM Edit   Reply   Quote Quick Reply   So the south pole of the planet is right side, the rotation sense is up to down and the rotation axis is almost east-west. Therefore you captured the thin lighted equatorial band, seemsly the south pole lighter than the hemisphere and darkenings in each hemisphere that may be correspond rather to the light repartition on a sphere. It seems to appear 2 parallel bands on an other orientation but this is nothing to do. Good one in RGB and rather excellent, this means the level contrasts faint but accessible still. Stanislas-Jean Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: Uranus October 28 [Re: stanislas-jean]       #5556798 - 12/06/12 02:03 AM Attachment (12 downloads) Edit   Reply   Quote Quick Reply   On the 1st Nov I did this with the 305mm. A comparison may be. Stanislas Jean Post Extras:       John Boudreau professor emeritus Reged: 04/06/08 Loc: Saugus, MA Re: Uranus October 28 [Re: Sunspot]       #5557043 - 12/06/12 08:24 AM Edit   Reply   Quote Quick Reply   Quote: I matched the orientation to the moons. Thanks!! Paul Hi Paul, Do you mean that it's celestial S up, or the planet's S pole itself? Post Extras:       Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Re: Uranus October 28 [Re: John Boudreau]       #5557161 - 12/06/12 09:48 AM Attachment (11 downloads) Edit   Reply   Quote Quick Reply   This is how the moons were orientated when I shot the frames. This is from Winjupos. South is up and the direction of rotation is left to right. Uranus makes life very confusing and I confuse easily... I'm thinking celestial south is up...right? Paul Post Extras:       sfugardi Carpal Tunnel Reged: 09/30/06 Loc: CT Re: Uranus October 28 [Re: Sunspot]       #5557463 - 12/06/12 12:36 PM Edit   Reply   Quote Quick Reply   Paul, excellent image! Looks like real detail. I need to go back and reprocess my old Uranus data which I originally used Registax5 on. Just recently I figured out how to draw a manual box on 1 point with AS2! for processing Io after castrating the video first. The whole moon orientation/inverted mirror view deal on Uranus always has confused me. Thanks for posting Regards, Steve Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: Uranus October 28 [Re: Sunspot]       #5557466 - 12/06/12 12:39 PM Attachment (9 downloads) Edit   Reply   Quote Quick Reply   The picture from Coelix gives you the right orientation for the time ccd shot. Stanislas-Jean Post Extras:       CPellier sage Reged: 08/07/10 Re: Uranus October 28 [Re: Sunspot]       #5557676 - 12/06/12 02:50 PM Edit   Reply   Quote Quick Reply   Hi Paul, and all, Given the position of the moons, the belt should be orientated at 90° from what it looks to be on the image, the worst case The signal-to-noise ratio of the image looks weak too. Noise can easily be confused with true details on Uranus. Paul, for how long have you been capturing the movie and how many frames have been stacked ? Post Extras:       Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Re: Uranus October 28 [Re: CPellier]       #5557790 - 12/06/12 03:59 PM Edit   Reply   Quote Quick Reply   Like I mentioned, I don't think there is any detail there. I was happy to get a nice color out of it. I forget my exposure time, probably around 1/10sec. I captured 1000 frames and stacked 500 for each filter. But it is fun to do...even if the orientation of Uranus totally confuses me. Thanks all. Paul Post Extras:       John Boudreau professor emeritus Reged: 04/06/08 Loc: Saugus, MA Re: Uranus October 28 [Re: Sunspot]       #5557855 - 12/06/12 04:48 PM Edit   Reply   Quote Quick Reply   Quote: This is how the moons were orientated when I shot the frames. This is from Winjupos. South is up and the direction of rotation is left to right. Uranus makes life very confusing and I confuse easily... I'm thinking celestial south is up...right? Paul Hi Paul, From your WinJUPOS simulation, your image has the S pole of Uranus up--- that's according to the convention used by the IAU (also WinJUPOS), the pole that is currently tilting towards Earth is the N pole. Celestial S is roughly at the 8 o'clock position of your image. As Christophe mentions, any true belt detail would be orientated almost 90° from where a belt-like pattern exists in your image, so I'm afraid it's just a noise or artifact pattern. But keep tryin'! With it's low surface brightness and small angular size Uranus is ripe for imaging gremlins. While the bands have been weakly recorded in visible R light in typical amateur sized scopes this year, it's still best to use a near-IR longpass like the Baader 685 IR-pass to catch them--- even then it takes good seeing and a stack of several thousand frames to help quench the noise. Post Extras:       Freddy WILLEMS Postmaster Reged: 11/13/05 Loc: Hawaii, Honolulu Re: Uranus October 28 [Re: John Boudreau]       #5557875 - 12/06/12 04:59 PM Edit   Reply   Quote Quick Reply   Oh man, you could image the rings ? Post Extras:       Sunspot Post Laureate Reged: 03/15/05 Loc: Surprise, AZ Re: Uranus October 28 [Re: Freddy WILLEMS]       #5557944 - 12/06/12 05:30 PM Edit   Reply   Quote Quick Reply   Nah....too easy. Going for details on the moons.... Quote: Oh man, you could image the rings ? Post Extras:       stanislas-jean Pooh-Bah Reged: 10/22/08 Re: Uranus October 28 [Re: Sunspot]       #5558600 - 12/07/12 01:34 AM Edit   Reply   Quote Quick Reply   Think the orientation is still not defined on the shot. However have a look on, a yellowish fillet appear on the shot, this could be the equatorial zone (strange artifact!), but the orientation remain unclear, 90° rotation compensation is wrong because with regards to the satelites locations a tilt angle more is interfering. So. If you look through the scope with no diagonal you should get the same pattern of the drawing, reason why. Thanks for Coelix. Stanislas-Jean Post Extras:       Pages: 1

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