Thursday, November 27, 2025

After the moon sets

 The official start of winter is more than three weeks away, but the winter constellations are now rising above Snowshoe Mountain in the late evening.  Shortly after moonset on Tuesday the measured sky brightness was 21.38 mpsas.  

Two cameras were used for these images: Olympus E-M1iii + Leica 15mm f/1.7 lens + Hoya Sparkle-6 filter, and Sony A7iii + Sony FE 50mm f/1.8 lens + Hoya Softon filter.

Jupiter (left) and Orion rising.  Leica 15mm.

Orion.  Sony 50mm.

Jupiter, Castor and Pollux.  Sony 50mm.

The view to the south featured the less-impressive constellation Cetus.  However, this constellation contains a nearby star, Tau Ceti (τ Ceti), that is only 11.9-ly distant and the 19th closest star system.  Notably, it is also the seventh-nearest naked-eye star.

Tau Ceti (circled) and Saturn (upper right corner).  Leica 15mm.

 
A closer look.  Sony 50mm

credit: SkySafariAstronomy.com

Neptune (circled) and Saturn.



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