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Triesnecker and Hyginus region, April 16.

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#1 Physicsman

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Posted 18 April 2024 - 05:03 AM

A single pane image from April 16.

 

Edge 11 at f10, ASI 462, best 1200 of 10000 frames stacked.

 

Rilles all over the place and indications of domes in the "chaotic" region to the north of Rima Hyginus. 

 

The ray system around Dionysius is "flaring" at the eastern end of the image.

 

2024 04 16 1932 8 U L Moon lapl5 ap885 F1200 R6 Th Gcr Gcur

 


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#2 scottinash

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Posted 18 April 2024 - 06:48 AM

Superb image, Jeff!   So many things in one shot with the exceptional multi-rille detail, X3?, V, Aries hoofprint, domes, vents, pyroclastics, etc, etc. Wow!! 

 

Rima Hyginus is showing extremely well with the multiple areas of chained tube collapses!  


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#3 Physicsman

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Posted 18 April 2024 - 06:52 AM

Superb image, Jeff!   So many things in one shot with the exceptional multi-rille detail, X3?, V, Aries hoofprint, domes, vents, pyroclastics, etc, etc. Wow!! 

 

Rima Hyginus is showing extremely well with the multiple areas of chained tube collapses!  

Scott, I think you look at my images far more carefully than I do!

 

The Hyginus pyroclastics and a couple of the domes were apparent to me, but I'll have to have another look at this for the Aries hoofprint etc.

 

Thanks for showing such interest.


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#4 flt158

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Posted 18 April 2024 - 07:13 AM

Isn't the Aries footprint right in the middle of Jeff's image. 

Please correct me if I''m wrong. 

But look at all those rilles!

A lot of them have designations.

 

Excellent imaging by you, Jeff. 

Your zoom looks extremely good. 

 

From Aubrey.  



#5 scottinash

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Posted 18 April 2024 - 07:20 AM

Isn't the Aries footprint right in the middle of Jeff's image. 

Please correct me if I''m wrong. 

But look at all those rilles!

A lot of them have designations.

 

Excellent imaging by you, Jeff. 

Your zoom looks extremely good. 

 

From Aubrey.  

Hi Aubrey. Yes, the “hoofprint” is directly above Hyginus. 
 

Some older lunar maps labeled this area as Mount Schneckenberg aka “Snail Mountain.” No longer official IAU nomenclature however.  
 

https://the-moon.us/.../Schneckenberg 


Edited by scottinash, 18 April 2024 - 07:57 AM.

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#6 Borodog

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Posted 18 April 2024 - 07:32 AM

Great image, Jeff. Love those rilles.


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#7 Physicsman

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Posted 18 April 2024 - 08:53 AM

Thanks for the comments, folks.

 

The original TIF, enlarged a bit, looks better than the jpeg here.

 

There are a lot of small background craters I've not noticed previously, giving a more "speckled" appearance than I'm used to. 


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#8 12BH7

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Posted 18 April 2024 - 09:18 AM

I love a good rille image - thanks.



#9 Physicsman

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Posted 18 April 2024 - 01:43 PM

Adding-in a separate 1200 frame pane to the one above completes the Sinus Medii area.

 

Comparing to LROC Quickmap, the smallest craters come in at around 0.8km, so ~ 0.4" resolution.

 

It was a blustery evening with gusts to 35mph, so pleased with this.

 

2024 04 16 1932 8 36 3 F1200 R6 Th Gcr Gcur stitch 2

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#10 Borodog

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Posted 18 April 2024 - 02:12 PM

More is more better!

 

Looks great, Jeff. I especially like the ejecta rays from that young crater on the right. I am too lazy to look up its name. :O)


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#11 Physicsman

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Posted 18 April 2024 - 02:43 PM

More is more better!

 

Looks great, Jeff. I especially like the ejecta rays from that young crater on the right. I am too lazy to look up its name. :O)

It's Dionysius, Mike.

 

I only know that as I looked it up earlier this afternoon! I'm pretty good with a lot of lunar features, but advancing age is taking its toll.

 

When I can't remember Copernicus I'll be seriously worried!


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#12 scottinash

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Posted 18 April 2024 - 10:03 PM

Another amazing image, Jeff!  Crazy that you were able to secure such great results with 35mph winds! applause.gif

 

I agree with Mike that those rays from Dionysius are very nice!   I didn't recall observing this crater before so looked it up to place a sticky note in my copy of Wood's 21st Century Atlas of the Moon and was happy to see his label on Chart 12 that reads "Dionysius dark rays."  


Edited by scottinash, 18 April 2024 - 10:30 PM.

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#13 Physicsman

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Posted 19 April 2024 - 04:27 AM

Another amazing image, Jeff!  Crazy that you were able to secure such great results with 35mph winds! applause.gif

 

I agree with Mike that those rays from Dionysius are very nice!   I didn't recall observing this crater before so looked it up to place a sticky note in my copy of Wood's 21st Century Atlas of the Moon and was happy to see his label on Chart 12 that reads "Dionysius dark rays."  

I got lucky with the wind direction. The prevailing winds in this neck of the woods are from the west, but recently we've had an endless stream of low pressure systems and the winds have been gusting in from all directions.

 

On this occasion, the NW/W winds were largely screened by the observatory walls. I was also well above the dew point - fortunate as I couldn't use a Dew Shield as it'd catch the wind and cause vibrations.

 

The edges of the raw TIF files were a bit jagged, but the stacking of the images worked well.




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