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Neptune (not easy)

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#1 Uwe Pilz

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Posted 14 September 2021 - 05:48 PM

Dear observers, Neptune is in opposition and I gave it a try. I had a rather hard time with my 32 cm Newton. I finished with a 5x Barlow form Televue at 290x and could glimpse some detail. I was worth the try.

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  • 2109152215Neptun_Ninja_290.jpg

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#2 frank5817

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Posted 14 September 2021 - 06:56 PM

Uwe,

 

Very nice sketch  of Neptune and great you saw some detail, even better.

 

Frank :)



#3 erick86

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Posted 14 September 2021 - 08:01 PM

That’s amazing! I’ve often wondered whether it’s possible to catch a glimpse of the Great Dark Spot. My skies are never stable enough to think of trying seriously.

Cool to see that you could see some detail.

Eric

#4 mdowns

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Posted 14 September 2021 - 08:07 PM

Fine job capturing elusive details Uwe,Impressive!



#5 Uwe Pilz

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Posted 15 September 2021 - 12:23 AM

I do not believe that I saw the Great Dark Spot, at least not in closer sense.

 

Here

https://static01.nyt...ty=90&auto=webp

 

you find an image of it. The spot is much too small for my optics and my conditions.

 

It may be, however, that the dark area in the south contained it.

 

Here 

https://www.research...Neptune/figures

 

is a drift diagram (some kind of it). After this, it moves with 62°/year. If I extrapolate it, I got around 30 deg for the spot. My central meridian yesterday was around 0, so it could be that it was in view.  The southern dar area was "before" Neptun's meridian, that fits too.


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#6 Quinnipiac Monster

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Posted 15 September 2021 - 05:43 AM

I think that when working on such small and dark disks one should always beware of diffraction effects and "visual noise". Once I had my 10" set up right next a 24", both aimed at Uranus. I suspected irregularities with my telescope, though I could not pin them down exactly. The 24" showed a much better, brighter, and absolutely uniform disk. What I was seeing in my telescope was just "visual noise" due to the low light conditions and small image. Just my 2c.


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#7 niteskystargazer

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Posted 15 September 2021 - 01:38 PM

Uwe,

 

Fine sketch of Neptune (not easy) smile.gif .

 

CDS,KLU,

 

thanx.gif ,

 

Tom




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