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Jon Greif

Location of Photo:

Mayhill, NM, USA remotely from La Jolla, CA, USA

Date/Time of photo:

November 22, 2021, at 4:00 am MST


11 inch Celestron RASA with one shot color camera, three 240 second exposures, stacked and processed with Pixinsight 1.8.8 software.


This is Comet C/2021 A1 (Leonard), photographed this morning, just before dawn, using an 11 inch Celestron RASA reflector with one shot color camera, located in Mayhill, NM, and accessed remotely through iTelescope.net. A much-anticipated comet, C/2021 A1 (Leonard) is brightening and might become 2021’s brightest comet by year’s end. Astronomer Greg Leonard discovered the comet as 2021 began. The comet is now heading inward toward its perihelion, closest point to the sun, on January 3, 2022, after which it will only be visible from the Southern Hemisphere. C/2021 A1 is currently in the constellation of Canes Venatici, 119,925,327 km from Earth, and will make its closest approach to Earth on Monday, December 13, 2021 at a distance of 35,005,384 kilometers: