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David Callejas

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January 20, 2019

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Catherine Hyde
Cambria, CA USA

11/08/2023
06:20 pm

Photographer's Website

Equipment Details:

Takahashi 106 scope, Nikon D810A camera, Astro-Physics Mach2 GTO tracking mount. I used a tool in the mount software called Horizons. It allows you to load an ephemeris from the JPL Horizons website and use it to track the comet.

Post-processing Details:

Very little. I stretched it a bit and ran a noise elimination software.

Image Details:

This is my second try at the comet C/2023 H2 Lemmon. It turned out better than last time, but it's still not as bright as I had hoped. The reason the stars appear as slashes is because I was tracking at the speed of the comet, not the stars. The head of the thing seems nice and bright, but I still can't bring out a tail.

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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!