The 6.4% Waxing Crescent Moon, May 2023

The 6.4% Waxing Crescent Moon, May 2023

May 21st, 2023, 8:55 p.m. local time

I last had an opportunity to truly observe the night skies over a month ago. There was a lot of overcast in April, and particularly over the past week and then some, the skies have been hazy, when it seemed they should have been clear. I have been told this is due to Canadian wildfires (again?). For the last two nights, the skies actually remained crisp blue at Sunset.

On Saturday night, I did observe the 1%+ Moon, a very sliver of a crescent. There was still ample daylight and the Moon was already nudged towards the Western tree lines, so I did not even contemplate taking a photograph. But it did prompt me to plan for Sunday evening.

Venus was also in the West sky, but much higher. More on Venus in a subsequent article. For now, we have just the Moon, at a very young crescent. Focusing on the 6%+ of lunar surface was surprisingly easy through my Mak-Cass, even with the Moon so low in the sky, a testament to the night’s clarity and absence of clouds and smoke.

Equipment Used:

  • 127mm Mak-Cass telescope
  • 23mm eyepiece
  • No eyepiece filter
  • iPhone 14 Pro
  • Smartphone telescope eyepiece adapter
  • NightCap app on iPhone
  • f/1.8
  • 1/8 sec exposure
  • ISO 57
  • Focal length: 7mm
  • Touchups in PaintShop Pro and AfterShot Pro


I write frequently about astrophotography, technology advice, and my other interests like science fiction. I have over 30 years of experience in computer programming, information technology, and project management.

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