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Early Crescent Moon on May 13, 2021

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#1 james7ca

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Posted 14 May 2021 - 02:55 AM

Taken during twilight (8:12PM PDT) using an Astro-Tech AT72ED scope and a ZWO ASI178MM camera.

 

Unfortunately, San Diego's typical marine layer clouds were already gathering and I had only enough time for this sequence and and one other before complete overcast. For this particular shot I captured 1029 frames with an exposure time of 5ms at a gain of 270. If you look closely you may be able to see a faint trace of the earthshine (along with some noise and sensor artifacts), although my second sequence that used a longer exposure more clearly recorded that feature.

 

Captured using SharpCap with image processing done in AutoStakkert!, Registax, and Photoshop CC2021.

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  • Crescent Moon with AT72ED and ASI178MM (small).jpg

Edited by james7ca, 14 May 2021 - 05:02 AM.

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#2 Kenny V.

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Posted 14 May 2021 - 07:22 AM

Great image, James!

 

Ken



#3 rford322

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Posted 14 May 2021 - 09:13 AM

Clouds and low fog in the LA area ruined my plans for the 13th.  I did drive 90 miles north on the 12th for this shot of the moon and Venus with a RedCat.

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#4 james7ca

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Posted 14 May 2021 - 10:07 PM

Ken, thanks for the comment.

 

rford322, I had already seen your image in another thread, it's a nice catch.

 

As for my image, I'm working on a new version that may do a better job on the earthshine. I'm trying to combine a stack of all 1029 subs to reduce the noise in the dark areas with a set of quality selected subs for the sunlit side. I also have a sequence that was exposed just for the earthshine, so worse case I could combine the two sequences into a single image.



#5 Dave Mitsky

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Posted 15 May 2021 - 12:31 AM

Great image, James!

 

Ken

I'll second that.



#6 Tom Glenn

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Posted 16 May 2021 - 01:18 AM

James, this is a very nice image.  We're definitely in the "May gray" season now, to be followed by "June gloom", so attempting to image is always hit and miss.  Well done. 



#7 kevinmat

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Posted 16 May 2021 - 08:48 AM

Very nice images, both. Love the appearance of that first sliver of the new moon.



#8 PhotonJohn

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Posted 16 May 2021 - 07:01 PM

Very nice, serene #3.


Edited by PhotonJohn, 16 May 2021 - 07:03 PM.



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