Thursday, February 20, 2025

Crescent Venus

 At magnitude -4.6, Venus is the brightest object in the sky after the Sun and the Moon.  It is currently in its crescent phase, 22% illuminated.  The crescent phase is easlly observed with a small telescope.

These images were obtained during twilight at 6 pm on 20 Feb  while the planet was 32° above the horizon. The equipment used was a Celestron C6 SCT and an Olympus E-M5iii camera.  Exposure was 1/1600 sec at ISO 400. 

The best single image.

A stack of the three best images.

six-image animation.

This six-image animation shows the effect of atmospheric turbulence.  Dedicated planetary-photography practitioners will typically record a video consisting of hundreds (or more) frames, then select the sharpest fraction of that total to stack into a final image, with results that can be spectacular.  I am not a dedicated practitioner.

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