Comet C/2021 A1 (Leonard) from La Parguera, Lajas, PR past Raymond Negrón.
Comet Leonard is 2021's best comet
Comet C/2021 A1 (Leonard) – 2021'southward best and brightest comet – is at present in the evening sky for Northern Hemisphere observers. We heard on December xv, and again around December 19-20, that the comet had brightened more than than expected. Is information technology having outbursts as it nears its closest point to the sunday in January?
New reports on December 20 besides indicate its tail is slightly bigger. And so continue watching the comet this week!
As ever, dark skies are recommended for this diffuse object. And – although we're not hearing reports of people viewing the comet with the unaided eye – Comet Leonard is all the same a good binocular comet. And it's near Venus, the brightest planet! Comet Leonard swept closest to Globe on December 12, 2021, passing some 21 million miles (34 million km) away. Its exceptionally close pass of bright Venus (2.6 million miles, or 4.2 meg km) happened on December 17-xviii.
#Comet Leonard C/2021 A1 Taken past Dan Bush on Dec 28, 2021 Albany, Missouri, USA. #CometLeonard movie.twitter.com/ocU42M65wC
— Space Physics ?? (@Space_HRH) December xxx, 2021
View at EarthSky Community Photos. | John Ashley was in Arivaca, Arizona, last dark when he caught Comet Leonard – 2021's best comet – in the evening sky. John wrote: "Comet Leonard sets behind southern Arizona's sacred Baboquivari Tiptop, illuminated by a 96% moon, during nautical twilight on Dec xvi. Leonard showed a little bit of coma and tail through the atmospheric brume, to the photographic camera at least. I couldn't see the comet at all in existent time, even searching through binoculars." Thank you, John! Remember, you need a dark sky if y'all want to search for Comet Leonard.
Closest to Venus, closest to sun
Closest approach to Venus was at ix:08 p.one thousand. ET on December 17 (02:08 UTC on Dec 18).
Comet Leonard volition round the dominicus at perihelion on January three, 2022, at a distance of almost 56 million miles (0.half-dozen AU, or 90 million km). Comets are typically brightest effectually perihelion, and the comet has been brightening and is still getting brighter. And, as contempo activity shows, there's always the possibility of brightness outbursts every bit Comet Leonard draws nearer and nearer the sun.
Past the way, astronomer Greg Leonard discovered this comet as 2021 began, giving information technology its name. Information technology'southward been much-anticipated, and it'south turning out to exist quite a fine object for viewing!
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Mag ii.6!? Comet leonard is brightening more than expected! https://t.co/d4sX1SDdYZ
— C/2021 A1 (Comet Leonard) (@Comet2021a1) December 15, 2021
Comet Leonard: Once in a lifetime
So Comet Leonard is the best comet we've had this yr. Ordinary 7×35 or 10×50 binoculars from a disbelieve store will surely evidence it to you (if your sky is night). The comet might be glimpsed with the center alone, the catchy matter will exist to catch information technology at just the right time after sunset, not too early on (when bright twilight will wash it out) and not also late (when it volition accept set). The free, online planetarium plan Stellarium can provide a view from your location.
Nature provides united states with sky events seen once in a lifetime, Comet Leonard is ane of these. By that we hateful that this comet takes tens of thousands of years to complete an orbit around the sunday. As Bob King pointed out at Skyandtelescope.com in October 2021:
Orbital calculations revealed that the object had spent the terminal 35,000 years wending its way sunward after reaching aphelion at the chilling distance of around iii,500 AU (three,500 times the distance betwixt our Earth and sun).
This perspective on Comet C/2021 A1 (Leonard) shows its trajectory through our solar system. North is upward. Y'all can run into that its orbit will cause it to be initially visible from Earth's Northern Hemisphere, and then from the Southern Hemisphere. Chart via The Heaven Live.
Ultrafast comet
An amazing feature of this angelic visitor is that information technology'due south an ultrafast comet. Information technology's traveling at 158,084 miles per 60 minutes (254,412 km/h or 70.67 km/second) relative to World.
But, despite its incredible speed through the vast space of our solar system, don't expect to encounter this comet swoosh across the sky. Like planets, comets do move in front of the star background. But, to our optics, they announced to move slowly due to the large distances involved. Is it possible to discover this comet's motion.
Yeah, if you're a careful observer and willing to spend some time. The best way would exist with a small telescope. You lot'd exercise it past taking a shut look at the comet's position relative to background stars. So compare the telescopic view five or x minutes afterwards to detect the comet'due south motion. Despite its loftier speed, you lot'll find that its distance from Earth – and the vast distances in our solar system – volition cause the comet to appear as a very wearisome-moving object.
Location of Comet Leonard on Dec 31, 2021 simply after sunset. Illustration by Eddie Irizarry / StellariumLocation of Comet Leonard on January one, 2022 just subsequently dusk. Analogy by Eddie Irizarry / StellariumLocation of Comet Leonard on Jan 3, 2022 (closest arroyo to the Sun). Facing Southwest merely after sunset. Illustration past Eddie Irizarry / Stellarium
Comet Leonard photos in the evening sky
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Comet C/2021 A1 (Leonard) on December 17, 2021 as seen from Rincon, Puerto Rico by Raymond Negron. Thanks Raymond!View at EarthSky Community Photos | Chris Zurita well-nigh Tucson, Arizona, USA, captured this dusk with Comet Leonard (C/2021 A1) on December 16, 2021, and wrote: "Been waiting for articulate skies as we just had a tempest roll in the last few days. Tracked the comet in the early on mornings last week. Was waiting for when it would show upward afterward sundown." Cheers, Chris!View at EarthSky Community Photos. | Eliot Herman in Tucson, Arizona, captured this evening view of Comet Leonard on December 15. It's the fuzzy "star" in the upper right of the photo. Eliot wrote: "Comet Leonard C/2021 is an like shooting fish in a barrel spot with optical assist in the evening heaven, but simply exterior my capability with the middle alone. This photo was captured in the fading Tucson calorie-free just higher up the haze layer. Information technology might be a bit better by December 17, when it will be higher in the sky well-nigh Venus." Cheers, Eliot! Will you lot see the comet after sunset tonight … nearly Venus? Eliot has a dark heaven. You demand 1, too. Thank yous, Eliot!
Comet C/2021 A1 (Leonard) on Dec 21, 2021 from Rincon, Puerto Rico by Raymond Negron. (92mm Refractor Telescope)
Comet Leonard photos in the morning sky
View at EarthSky Community Photos. | C/2021 A1 (Leonard) on Dec vii, 2021, via Steven Bellavia in Southold, New York. Thank you, Steve! With the middle, in a dark sky, the comet will look more than like a fuzzy "star," perhaps with a tail extending to one side. Steve created this composite by stacking 45 threescore-2nd images (processed with Nebulosity 4). Thank you, Steve!View at EarthSky Community Photos. | John Ashley captured this fourth dimension-lapse epitome of Comet Leonard before sunup yesterday. He wrote: "Early Saturday morn, Comet Leonard cruised past the foursquare MMT Observatory … on summit of Mount Hopkins, near Amado Arizona. Comet images were approximately 30-seconds apart in this interval photograph, which too includes a shooting star and vehicle headlights leaving the observatory." Thank y'all, John!View at EarthSky Customs Photos. | On December 3, 2021, comet C/2021 A1 (Leonard) was near in the sky to the stunning globular star cluster Messier 3. Patrick Prokop in Savannah, Georgia, wrote: "Comet Leonard and M3. This is a blended of thirty ten 2-minute exposures … " Give thanks y'all, Patrick! See more Comet Leonard photos at EarthSky Community Photos.View at EarthSky Community Photos. | Chris Woodruff in Lockwood Valley, California, also captured the comet and M3 on December three, 2021. Chris wrote: "Woke upwardly this morning at around 4:30 a.thou. PST in Valencia, California. I logged into my remote observatory in the Lockwood Valley and captured a set of 240-sec, 140-sec, and threescore-sec images using my Radian 61 f/iv.5 Imaging APO Telescope with an SBIG 8300c photographic camera. Was very surprised to meet how close these objects were (using your website as a guide). This is the starting time quick process using only the 240-sec images merely volition see if combining all of the images will give a scrap more particular in one case I get a chance." Beautiful, Chris! Thank you. See more Comet Leonard photos at EarthSky Community Photos.View at EarthSky Community Photos. | Patrick Prokop in Savannah, Georgia, captured 24 2-infinitesimal exposures of Comet Leonard on November 27, 2021, around v a.m. to create this beautiful blended image. Thank you, Patrick! Submit your comet image to EarthSky.View at EarthSky Community Photos. | Radu Anghel in Parjol, Romania, captured this view of Comet C/2021 A1 (Leonard) with a iv-inch telescope on November 25, 2021, and wrote: "Comet C/2021 A1 Leonard sliding silently with galaxies NGC 4631 and 4656 on the groundwork on the forenoon of November 25." Give thanks you, Radu!Raymond Negron took this spectacular image of Comet Leonard passing almost in front of the Whale Galaxy (NGC4631) from San German language, Puerto Rico, on November 24, 2021. Cheers, Raymond!View at EarthSky Community Photos. | David Hoskin in Halifax, Nova Scotia, Canada, defenseless Comet Leonard on November 7, 2021, and wrote: "Comet Leonard (C/2021 A1) imaged this morning just earlier dawn. The comet is currently in Ursa Major and has an observed magnitude of x.8, visible with a telescope aperture of 6″ or greater. The comet is predicted to brighten until xiii December, at which time it may be visible with binoculars." Thank you, David!View at EarthSky Customs Photos. | Eliot Herman in Mayhill, New United mexican states, captured this photo of Comet Leonard and a spiral galaxy on Oct 30, 2021. He wrote: "Comet Leonard (C/2021 A1) is predicted to put on a nice show in a piffling more than than a month. At nowadays information technology is still faint at about magnitude eleven, and on October 30 information technology had a very close conjunction with galaxy NGC 3897 in Ursa Major." Thanks, Eliot!Comet Leonard (C/2021 A1 Leonard) photographed on Oct 29, 2021, by Michael Jager (@komet123jager on Twitter) from Austria. Give thanks you, Michael!
Bottom line: Comet Leonard (C/2021 A1) – discovered on January three, 2021 – is heading inward toward its January 3, 2022, perihelion. It still might go the brightest comet of 2021! Photos and charts here. Bookmark this post. Nosotros'll be updating it.
Eddie Irizarry
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Nearly the Author:
Eddie Irizarry of the Sociedad de Astronomía del Caribe (Astronomical Society of the Caribbean) has been a NASA Solar System Ambassador since 2004. He loves public outreach and has published multiple astronomy articles for EarthSky, as well as for newspapers in Puerto Rico. He has as well offered dozens of conferences related to asteroids and comets at the Arecibo Observatory. Asteroid 33012EddieIrizarry, a vii.viii km space stone, has been named in his honor.
Deborah Byrd
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About the Writer:
Deborah Byrd created the EarthSky radio serial in 1991 and founded EarthSky.org in 1994. Today, she serves equally Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a strength for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.
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