A comet first spotted in the distance in 2017 might finally be within view soon of amateur astronomers.
Comet C/2017 K2 (PANSTARRS), called K2 for short, was then the farthest active comet ever spotted, a title it recently surrendered to megacomet Comet Bernardinelli-Bernstein, detected last year. But even down one superlative, K2 is remarkable for activity. The comet began to spew gas and dust in the far outer solar system, whereas it's more typical for comets to wake up around Jupiter's orbit, much closer in.
Five years later, the icy body is finally drawing within reach of Earth and its amateur astronomers. K2's closest approach to our planet will be on July 14, and it will get closest to the sun on Dec. 19.
Related: Giant comet was active way farther from the sun than expected, scientists confirm
Assuming K2 survives the heated journey and continues to brighten, EarthSky (opens in new tab) predicts people with small telescopes will be able to spot the sojourner soon.
"It should brighten tomagnitude8 or even 7, still too dim for the unaided eye," EarthSky wrote.
Sharp-eyed viewers can usually spot stars of magnitude 6 in dark-sky conditions with no aid. In the case of this comet, you will also need areas away from light pollution to spot it with a telescope.
"The darker the skies, the better the contrast will be," EarthSky advised.
As the comet approaches us, professional observatories may be able to figure out how big its nucleus is. Early observations by the CanadaFranceHawaii Telescope (CFHT) suggested K2's nucleus could be between 18 and 100 miles (30 to 160 kilometers) wide; Hubble Space Telescope observations suggested it might be only 11 miles (18 km) at most, EarthSky said.
In 2017, Hubble imagery determined that the comet's coma (or fuzzy atmosphere) likely includes oxygen, nitrogen, carbon dioxide and carbon monoxide, all turning from solid to gas as the comet warmed.
An archival search of CFHT imagery suggested K2 was active at least as far back as 2013, when it was between the orbits of Uranus and Neptune, NASA said at the time.
All predictions for comet activity are subject to change, however. Comets are prone to falling apart or brightening unpredictably when the draw close to the intense heat and gravity of our sun. That characteristic, however, makes them all the more interesting to astronomers who want to understand how comets are put together.
Follow Elizabeth Howell on Twitter@howellspace (opens in new tab). Follow us on Twitter@Spacedotcom (opens in new tab)and onFacebook (opens in new tab).
Read the original post:
A huge comet will fly by Earth in July and you might be able to see it - Space.com
- Comet - Wikipedia, the free encyclopedia - November 21st, 2013 [November 21st, 2013]
- Comets - The Nine Planets - November 21st, 2013 [November 21st, 2013]
- Comets - Astronomy For Kids - KidsAstronomy.com - November 21st, 2013 [November 21st, 2013]
- Views of the Solar System: Comets - November 21st, 2013 [November 21st, 2013]
- Comets (extra footage) - Video - November 21st, 2013 [November 21st, 2013]
- Solar flare update. 6 comets! Nov 28th ISON perihelion! - Video - November 21st, 2013 [November 21st, 2013]
- Comets game 2end goal - Video - November 21st, 2013 [November 21st, 2013]
- Missouri Comets vs. Milwaukee Wave - Video - November 21st, 2013 [November 21st, 2013]
- Football: Comets Advance Past Momence - Video - November 21st, 2013 [November 21st, 2013]
- Caliber Cheer Comets Nov 9 2013 - Video - November 21st, 2013 [November 21st, 2013]
- Two Comets Are About to Fly By Mercury | NASA Space Science HD Video - Video - November 21st, 2013 [November 21st, 2013]
- Comets win on tiebreaker - December 20th, 2013 [December 20th, 2013]
- Comets fend off Wildcat attack - December 20th, 2013 [December 20th, 2013]
- Free throws bring Comets down - December 20th, 2013 [December 20th, 2013]
- Comets continue solid play on their home ice - December 20th, 2013 [December 20th, 2013]
- Comets Beat Heat 4-2 - December 20th, 2013 [December 20th, 2013]
- Comets in the Community - December 20th, 2013 [December 20th, 2013]
- Comets pick up third straight win over Heat - December 20th, 2013 [December 20th, 2013]
- Comets Welcome Back Old Rival - December 20th, 2013 [December 20th, 2013]
- Comets Cool Abbotsford 4-2 - December 20th, 2013 [December 20th, 2013]
- Comets – Facts and Information about Comets | Space.com - December 20th, 2013 [December 20th, 2013]
- Comets v Wave 121313 Highlights - Video - December 20th, 2013 [December 20th, 2013]
- Highlights - Comets vs. Monsters 12/15/13 - Video - December 20th, 2013 [December 20th, 2013]
- Weekly Space Hangout - Preventing Asteroids, More Comets, Worldview Balloon - Video - December 20th, 2013 [December 20th, 2013]
- Pens 1 - Comets 0 - Video - December 20th, 2013 [December 20th, 2013]
- Milwaukee Waves Cheap Shot Vs. Missouri Comets - 12.13.13 - Video - December 20th, 2013 [December 20th, 2013]
- Hometown Nights - Tarso Miller and the Wild Comets - Video - December 20th, 2013 [December 20th, 2013]
- Hangout with Comets Nova and Deathlyhall - Video - December 20th, 2013 [December 20th, 2013]
- Comets vs St. Louis Ambush - Video - December 20th, 2013 [December 20th, 2013]
- Shake, Rattle and Roll Bill Haley and His Comets - Sheet Music - Easy Alto Sax Version - Video - December 20th, 2013 [December 20th, 2013]
- Comets Shut Out Heat 3-0 - December 21st, 2013 [December 21st, 2013]
- Administration - December 21st, 2013 [December 21st, 2013]
- Bill Haley And His Comets ' R-O-C-K' 78 rpm - Video - December 21st, 2013 [December 21st, 2013]
- Bill Haley And His Comets ' The Saints Rock 'N Roll' 78 rpm - Video - December 21st, 2013 [December 21st, 2013]
- Nicklas Jensen's Shootout Winning Deke 12-15-13 - Video - December 21st, 2013 [December 21st, 2013]
- Missouri Comets Night with Miles - 12.13.13 - Video - December 21st, 2013 [December 21st, 2013]
- 12/13/13 Comets 5 vs. Senators 2 - Video - December 21st, 2013 [December 21st, 2013]
- Comets rock Bulldogs for first win - December 22nd, 2013 [December 22nd, 2013]
- Comets Deposit Life's Building Blocks Across the Cosmos!(Dr.Ruehl) - Video - December 22nd, 2013 [December 22nd, 2013]
- Comets beat AHL rival Abbotsford again with shutout - December 23rd, 2013 [December 23rd, 2013]
- Comets Win Streak Grows to Four Games - December 23rd, 2013 [December 23rd, 2013]
- Comets Corner: On the Mask - December 23rd, 2013 [December 23rd, 2013]
- 'Comets of the Centuries': 500 Years of the Greatest Comets Ever Seen - December 23rd, 2013 [December 23rd, 2013]
- Hackensack High School (NJ) Football Home - MaxPreps.com - December 23rd, 2013 [December 23rd, 2013]
- Little Comets - Isles (Music Video) - Video - December 23rd, 2013 [December 23rd, 2013]
- Comets Have Two Players on MISL Team of Week - December 25th, 2013 [December 25th, 2013]
- ONE FOR THE RECORD DECEMBER 20 2013 21 FUKUSHIMA COMETS EARTHQUAKES NMR GZ PAUL AND BP - Video - December 25th, 2013 [December 25th, 2013]
- Comets in the Community: Christmas at St. Luke's - December 26th, 2013 [December 26th, 2013]
- Best comets of last 500 years - December 26th, 2013 [December 26th, 2013]
- STRANGE EVENTS In 2013 Earthquakes, Mass Animal Deaths, Extreme Weather, OORT Cloud Comets - Video - December 26th, 2013 [December 26th, 2013]
- Utica Comets " 'Twas the Night" - Video - December 26th, 2013 [December 26th, 2013]
- Missouri Comets vs. Rochester Lancers - Video - December 26th, 2013 [December 26th, 2013]
- Chasing Comets: In search of secrets about our origins - Video - December 26th, 2013 [December 26th, 2013]
- DREAM X2 COMETS/STARS FLYING OVERHEAD, MASSIVE SONIC BOOMS EARTH HIT POSSIBLY. - Video - December 26th, 2013 [December 26th, 2013]
- What are comets? - Video - December 26th, 2013 [December 26th, 2013]
- Game Preview: Syracuse Silver Knights at Missouri Comets and St. Louis Ambush - December 27th, 2013 [December 27th, 2013]
- Clark's performance boosts Clayton over Moss Point - December 27th, 2013 [December 27th, 2013]
- Gameday: Comets vs. Binghamton - December 27th, 2013 [December 27th, 2013]
- Comets Battle for First Place - December 27th, 2013 [December 27th, 2013]
- Gameday: Comets vs. Hamilton - December 28th, 2013 [December 28th, 2013]
- Comets fall to Senators - December 28th, 2013 [December 28th, 2013]
- Comets end winning streak - December 28th, 2013 [December 28th, 2013]
- Comets vs Syracuse Silver Knights - Video - December 28th, 2013 [December 28th, 2013]
- Winning Comets Soccer - Video - December 28th, 2013 [December 28th, 2013]
- Comets Lose in Final Minutes - December 29th, 2013 [December 29th, 2013]
- CometsTV: 12-27-13 Utica Comets vs. Binghamton Senators Highlights - Video - December 29th, 2013 [December 29th, 2013]
- Comets knock off Aquin for second time this season - December 31st, 2013 [December 31st, 2013]
- Comets fall after late rally - December 31st, 2013 [December 31st, 2013]
- CometsTV: 12-28-13 Utica Comets vs. Hamilton Bulldogs Highlights - Video - December 31st, 2013 [December 31st, 2013]
- Comets Corner: Kellan Lain - January 1st, 2014 [January 1st, 2014]
- Comets Welcome New Year - January 1st, 2014 [January 1st, 2014]
- Comets Media Game 2013 - Video - January 1st, 2014 [January 1st, 2014]
- 1957 AMI H200 playing Bill Haley and his Comets Rock Around The Clock. - Video - January 1st, 2014 [January 1st, 2014]
- 7 Amazing Christmas Kinder Surprise Eggs SMURFS cars, comets Unwrapping Review Chocolate Easter Toys - Video - January 1st, 2014 [January 1st, 2014]
- Shootout - Dogs @ Comets - 12/2813 - END - Video - January 1st, 2014 [January 1st, 2014]
- Shootout - Dogs @ Comets - 12/2813 - Video - January 1st, 2014 [January 1st, 2014]
- Catonsville girls basketball shows promise for another strong season - January 2nd, 2014 [January 2nd, 2014]
- Gameday: Comets vs. Lake Erie - January 2nd, 2014 [January 2nd, 2014]
- Comets Kick off New Year with Exciting Win - January 2nd, 2014 [January 2nd, 2014]
- Comets Remain Hot at Home with 3-2 Decision over Lake Erie - January 2nd, 2014 [January 2nd, 2014]