'Christmas Comet' Leonard: Peak View For VA, DC This Weekend

WASHINGTON, DC — Scan the skies over the District of Columbia and Virginia this weekend to see comet Leonard, which astronomers expect to show off its tail as it comes closer to our planet and the sun in its eons-long orbit.

Because of the timing of its close approach, Leonard has been called the "Christmas comet." It was closest to Earth on Dec. 12, but it remains visible for days after, and viewing opportunities may be excellent on Friday, Dec. 17, according to scientists.

The rare comet, which won't be back for 80,000 years, will appear directly below Venus in the early evening hours Friday, AccuWeather says.

Weather plays a critical role, too. The National Weather Service says conditions will be dicey for spotting the comet this weekend. Skies will be cloudy later Friday and Saturday nights, Dec. 17, and 18, over DC and northern Virginia. View early on Friday and you might catch a glimpse of the show.

Keep this in mind: Comets are "notoriously difficult to predict in terms of brightness and visibility," according to NASA. They're brightest when they're nearest to the sun, and its glare makes them difficult to see.

Still, astronomers say comet Leonard (C/2021 A1) could be as spectacular as comet Neowise was in 2020, and skywatchers may be able to see the Christmas comet with small telescopes or binoculars.

"There's a chance it could be bright enough to see with the unaided eye," NASA said in a discussion about spectacles in the December sky, "but again, with comets, you really never know."

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"It switches over to being an evening object after around Dec. 14th, for just a little while after the Sun sets — as it begins its long haul outward from the Sun again, progressively fading in brightness," according to NASA.

Astronomer Gregory J. Leonard discovered the comet that now bears his name on Jan. 3, 2021, from the Mount Lemmon Infrared Observatory, located in the Santa Catalina Mountains about 17 miles from Tucson, Arizona.

Leonard, a senior research specialist at the observatory, saw a tail — which astronomers say is a promising sign that we're in for a treat as the comet moves ever closer to Earth and the sun.

Comet Leonard was only discovered last year, but the icy ball has been making its way to our planet's solar system since the Paleolithic era.

It started the journey 35,000 years ago, when it was at the far end of its elongated elliptical orbit, called the aphelion, some 325 billion miles from the sun, "enveloped in an almost unimaginably cold environment, hovering just a fraction of a degree above absolute zero, the temperature at which all molecular motion stops," according to Space.com.

"Now, Comet Leonard is in the home stretch of what likely will be its very last visit to the sun, and its conglomeration of icy gases like methane, ammonia and water vapor is reacting to the increasing warmth of the sun."

The comet will make its closest approach to the sun around Jan. 3. It will be about 56 million miles away at that point.