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Plato Craterlets 9.10.19

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#1 azure1961p

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Posted 11 September 2019 - 10:32 AM

What a difference better collimation makes.  Other times, even when the seeing should've shown this under similar lighting they remained elusive except for one time a couple years ago - perhaps the last time it was perfectly collimated! So here it is.  High angle sun, pure albedo at work.

 

Pete

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#2 azure1961p

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Posted 11 September 2019 - 10:34 AM

BTW, this is an overlay drawing over an image of similar lighting. I concentrated only on the craterlets so the surrounding crater here is just for context.

 

Pete



#3 stargazer60

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Posted 11 September 2019 - 11:28 AM

Very nice detail, I enjoyed it very much.  Keep up the great work.waytogo.gif 



#4 niteskystargazer

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Posted 11 September 2019 - 01:35 PM

Pete,

 

Very good sketch of Plato Craterlets (On 9.10.19) smile.gif .

 

CS,KLKU,

 

thanx.gif ,

 

Tom



#5 frank5817

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Posted 11 September 2019 - 08:25 PM

Pete,

 

Impressive.

 

Frank :)



#6 azure1961p

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Posted 12 September 2019 - 12:34 PM

It's minor Frank but I'm proud of it lol.

 

Pete



#7 Uwe Pilz

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Posted 12 September 2019 - 12:47 PM

It is not an easy task to see the craterlats with such an aperture. Thank you for sharing.



#8 azure1961p

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Posted 13 September 2019 - 01:14 PM

Thanks Uwe.  I was inspired by Thomas Jensen here on CN (aka:  ASTROJENSEN) who mentioned with his 60mm Zeiss refractor glimpsing at times those spots.  No doubt your nice Mak would make great work of it but there's fun in the small aperture challenge. Thanks Uwe.

 

Pete



#9 Asbytec

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Posted 17 September 2019 - 06:59 PM

Pete, Plato for some reason is always a nice crater to visit. At high sun angles you did well to get bright spots. I am not sure your seeing was conducive to resolution, but I bet at more shallow sun angles you'll see full crater forms. In the best seeing, anyway. 



#10 azure1961p

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Posted 18 September 2019 - 08:37 AM

Yes Norme it was really albedo function.  A low sun angle for this scope tends to make things more difficult.  Thing is, Plato is already a dark floor, a low sun angle makes it darker and right where I need the extra X's it's now subdued some.

There was a time with Crater A I DID see the sunlit rim (a lower sun angle)and it carved a miniscule blunt kinda "C"  shape.  No shadow but that bright rim res. I'll say also the area of albedo was contained within the rim at least for craterlet A.

 

Pete



#11 Asbytec

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Posted 18 September 2019 - 08:42 AM

But that was seeing that did not allow better resolution at 0.5mm exit pupil.

Was that sighting before or after precise collimation? If before you collimated, then should be better next time you get a workable night.

What is your average seeing this time of year? I'd think around Pickering 7 you'd start to get some good snaphots.

Edited by Asbytec, 18 September 2019 - 08:47 AM.


#12 azure1961p

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Posted 18 September 2019 - 08:55 AM

Oh it was AFTER correct collimation.  It was spot on and finally this popped.  Ina though, yikes...yeah THATS still up in the air but seeings been lousy so...

 

Pete



#13 Asbytec

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Posted 18 September 2019 - 09:05 AM

Ina is very tiny, dude. Even in my 8" at 300x, and even in okay seeing it was not all that easy. Very tiny. I doubt a 3.5" can do it. Maybe though...but it's small. 



#14 Aquarellia

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Posted Today, 02:30 AM

That's a big deal to find them, and a good material test.

Well done

Michel




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