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David Callejas

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January 20, 2019

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Catherine Ryan Hyde
Cambria, CA, USA

01/31/2023
05:40 am

Photographer's Website

Equipment Details:

Takahashi 106 scope, Nikon D810A DSLR camera, Astro-Physics Mach1 tracing mount. I used a tool in the mount software that allowed me to download the ephemeris from JPL and track the comet rather than the stars. This is a single 120-second image.

Post-processing Details:

No stacking. Single image. I used Star Xterminator in PixInsight to remove the stars, and stretched the comet image without them. Then I used Blur Xterminator and the PixInsight tool Morphological Transformation to sharpen the stars, so they appeared less oval. Then I recombined.

Image Details:

I woke up at 2:30 a.m. on January 31st to try my hand at comet tracking with the Astro-Physics mount software tool Horizons and an ephemeris from JPL. All my efforts at stacking turned out poorly, so this is simply the best single 120-second image.

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January 20, 2019

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David Callejas

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About the Author:

David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us and appreciate the work we do. He helps manage the EarthSky Store and bring to you the new products that you love. He's the chief liaison between EarthSky.org and the world of commerce. All that, plus he helps post content and populate our pages on Facebook, Google+ and Twitter. Go David!