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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

02/12/2022
07:00 pm

Photographer's Website

Equipment Details:

ZWO ASI290MM CMOS camera with IR pass filter, Celestron C8 SCT (f/10, 2000mm FL), SkyWatcher EQ6-R Pro mount

Post-processing Details:

The best 500 frames were stacked with AutoStakkert, wavelets were adjusted with Registax 6, other post-processing (levels, sharpening and noise reduction) with Photoshop CS2 and PhotoScape X.

Image Details:

Mare Humorum, also known as the "Sea of Moisture", is a lunar mare located in an impact basin that is 425 km across. Gassendi is the large impact crater on the north edge of Mare Humorum. The crater floor contains a system of long, narrow depressions known as rilles. To the south lies the partially flooded crater Doppelmayer. Both Gassendi and Doppelmayer were formed before the impact that created the mare.

Posted

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!