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David Callejas

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January 20, 2019

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Kannan A
Singapore

06/17/2021
10:00 pm

Equipment Details:

Nikon Coolpix P900

Image Details:

Moon Direction: 280.34° W↑
Moon Altitude: 36.89°
Moon Distance: 379,827 km

The Lunar X and V are transient lunar features which are visible on the lunar surface for about 4 hours, once a month. Today was the night in Singapore when the moon was 44% illuminated and its first quarter moon phase.

They are caused by sunlight illuminating the edge of craters. The “X” is caused by light illuminating the rims of craters Blanchinus, La Caille and Purback. The “V” is caused by light illuminating crater Ukert along with several smaller craters.

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!