Wednesday, December 31, 2025

Year-end Sun, Moon, star clusters

The Sun today, 31 Dec, with an Astro-Tech AT72EDII refractor and Kendrick solar filter:

 


The Moon during twilight, same telescope:


 Last night (30 Dec) was another test of the AT72EDII with an Orion 1x field-flattener and a Metabones 0.71x Speedbooster.  This combination yields a 305mm f/4.3 optical train.  Tracking was a little bit off, but exposures were limited to 20 sec anyway because of the bright moon.  

M38, the "Starfish Cluster", in Auriga.  2-deg FOV.

M35 cluster in Gemini.  2-deg FOV.

 The open cluster M35 is a well-known show-piece object for small telescopes.  It apparently is also known as the "Shoe-Buckle Cluster".  I have been stargazing for over 60 years and was unaware of that nickname until just now, when I looked it up.

Happy New Year.

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