It is unusual to see a comet at its best: Most comets are brightest nearest the sun, just when they’re most difficult to spot against the sun’s glare or hidden below the horizon.
Comet C/2021 A1 (Leonard) is, alas, no exception. But it should be visible in small telescopes and binoculars and quite possibly even dimly to the unaided eye in the Northern Hemisphere’s pre-dawn sky as it increases in brightness for at part of December, and later in the month perhaps even briefly in the evening sky, just after sunset.
Astronomer Gregory J. Leonard, a senior research specialist, discovered the comet that now bears his name on Jan. 3 at the Mount Lemmon Infrared Observatory, located in the Santa Catalina Mountains, approximately 17 miles northeast of Tucson, Arizona.
News Source: https://www.space.com/comet-leonard-shines-in-december-sky