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Astrophotography and Sketching >> Solar System Imaging & Processing

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sfugardi
Post Laureate


Reged: 09/30/06

Loc: CT
Another Uranus IR685 f20 8/20/13 new
      #6036075 - 08/20/13 09:33 AM Attachment (31 downloads)

Under good seeing but poor transparency with a bright mooon, I was able to collect some new Uranus data. My plan was to go a little higher than f22 by switching the 2x barlow glass onto the longer 1.8x body, however, I outsmarted myself and grabbed the new 2x which is more like 1.6x at this point (tried on Neptune but still too much for the IR). By the time, I realized it the sky was brightening. So attached is a 1680sec capture at 5fps at approx f20 using IR685.

Regards,
Steve


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sfugardi
Post Laureate


Reged: 09/30/06

Loc: CT
Re: Another Uranus IR685 f20 8/20/13 new [Re: sfugardi]
      #6036085 - 08/20/13 09:35 AM Attachment (11 downloads)

So, you will notice that I left off the N pole indication due to the fact that the drift test and WinJupos do not seem to agree. I must be missing something basic on the orientation. Any simple advice would be greatly appreciated.

Regards,
Steve


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Pete Gorczynski
sage
*****

Reged: 05/09/08

Loc: Oxford, CT USA
Re: Another Uranus IR685 f20 8/20/13 new [Re: sfugardi]
      #6036160 - 08/20/13 10:15 AM

Steve,

Try http://pds-rings.seti.org/cgi-bin/tools/viewer2_ura.pl to get the correct orientation. There is also a viewer for Neptune to which John Boudreau turned me on to.

Also I think tonight we may have an excellent oppotunity for good seeing in CT, but don't wait too long because I expect fog to roll in late. Have you tried to image at prime focus? Sure, the image scale is small, but both Uranus and Neptune are low surface brightness objects. I think using a barlow spreads out what little light is available too much.

Regards,

Pete G.


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lcd1080
scholastic sledgehammer


Reged: 06/03/10

Loc: Maryland, USA
Re: Another Uranus IR685 f20 8/20/13 new [Re: Pete Gorczynski]
      #6036261 - 08/20/13 11:11 AM

Another high quality effort Steve! As for grabbing the new 2x don't feel bad, at 4 in the morning my IQ regularly slips to a level where that kind of mistake is to be expected.

Pete


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sfugardi
Post Laureate


Reged: 09/30/06

Loc: CT
Re: Another Uranus IR685 f20 8/20/13 [Re: lcd1080]
      #6036280 - 08/20/13 11:21 AM Attachment (11 downloads)

Pete G, thanks for the info link. I tried to pull out the new Neptune data from last night looking for your limb brightening but no luck. I found Triton easily. At only 4fps for the IR data, there is no chance for a barlow. I'll compile the RGB data and post later. Wow the CSC looks excellent all night. I hope I have some energy left.

Pete, Thanks! It's tough getting 2hrs of sleep and waking up at 1am...

Regards,
Steve


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CPellier
scholastic sledgehammer


Reged: 08/07/10

Re: Another Uranus IR685 f20 8/20/13 new [Re: sfugardi]
      #6037086 - 08/20/13 06:31 PM

Hi Steve, the orientation of WinJupos seems correct to me as well .
The planet is quite well circular but I think it lacks frame stacking. 2000 is not a lot on Uranus


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sfugardi
Post Laureate


Reged: 09/30/06

Loc: CT
Re: Another Uranus IR685 f20 8/20/13 new [Re: CPellier]
      #6037449 - 08/20/13 10:59 PM Attachment (6 downloads)

Christophe, thanks for verifying the orientation. I can go back and try stacking 3 or 4K out of the 8K collected. Here's my IR-RGB Neptune pasted back onto the prior Ir stretched image,

Regards,
Steve


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sfugardi
Post Laureate


Reged: 09/30/06

Loc: CT
Re: Another Uranus IR685 f20 8/20/13 new [Re: sfugardi]
      #6037488 - 08/20/13 11:28 PM Attachment (3 downloads)

Here's a 4000frame restack out of the 8403frames. The detail is not much different from the last 2K stack and does not seem to line up with the expected belt direction

Regards,
Steve


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