Solar System's fastest-known asteroid spotted, flies closer to the Sun than Mercury
(2021/08/24)
- Reference: 1629786789
- News link: https://www.theregister.co.uk/2021/08/24/fastest_asteroid_solar_system/
- Source link:
Astronomers have discovered the fastest asteroid orbiting the Sun yet, a one-kilometre-wide space rock that completes a lap of our star every 113 Earth days.
The asteroid, known as 2021 PH 27 , was clocked on August 13 by Scott Sheppard of the Carnegie Institution for Science in the US. He noticed the object in images taken by Ian Dell’antonio and Shenming Fu, of Brown University, using the 570-megapixel Dark Energy Camera on the Victor M. Blanco telescope in Chile.
Rather than live in the asteroid belt between Mars and Jupiter, PH 27 was observed much closer to our star. In fact, during its orbit, PH 27 gets closer to the Sun than Mercury: the rock's shortest distance to the star is just 20 million kilometres (12 million miles), at which point its surface has the lead-melting temperature of 480°C (900°F). PH 27 's 113-day orbit has a semi-major axis of 70 million kilometres (43 million miles), and it crosses the orbits of Mercury and Venus.
[1]
David Tholen of the University of Hawaii calculated PH 27 ’s path around the Sun from its position in the images. Over the next few days, as word of the exciting strange rock emerged, astronomers at other observatories used Tholen's calculations to point their telescopes at where the asteroid ought to be, and they too [2]sighted PH 27 .
[3]
[4]
“Though telescope time for astronomers is very precious, the international nature and love of the unknown make astronomers very willing to override their own science and observations to follow up new, interesting discoveries like this,” Sheppard [5]said on Monday.
The race was on to confirm Sheppard and Tholen's findings before the space rock disappeared from view.
[6]
“Because the object was already in the Sun’s glare and moving more toward it,” Tholen [7]said , "it was imperative that we determine the object’s orbit before it was lost behind our central star. I surmised that for an asteroid this size to remain hidden for so long, it must have an orbit that keeps it so near to the Sun that it is difficult to detect from Earth’s position.”
[8]Good news: There's a slightly increased chance of asteroid Bennu hitting Earth. Bad news: It's still really slight
[9]Astroboffins think strangely porous boulders found on asteroid Ryugu may be the stuff of proto-planets
[10]NASA's first asteroid sample on its way to Earth after OSIRIS-REx boosts for home
[11]Euro space boffins hatch comms satellite hijack plan to save Earth from extinction
Since PH 27 lives so close to the Sun, and has a relatively low mass, it experiences general relativistic effects more so than any other known Solar System object, according to the US National Science Foundation's NOIRLab. Its orbit also is unstable, and astronomers reckon in a few million years or so it’ll either be destroyed in a collision with Mercury or Venus, burn up from getting too close to the Sun, or be kicked out of its orbit by other bodies.
“Most likely PH 27 was dislodged from the Main Asteroid Belt between Jupiter and Mars and the gravity of the inner planets shaped its orbit into its current configuration,” Sheppard said.
“Although, based on its large angle of inclination of 32˚, it is possible [it] is an extinct comet from the outer Solar System that ventured too close to one of the planets as the path of its voyage brought it into proximity with the inner Solar System.”
“Understanding the population of asteroids interior to Earth’s orbit is important to complete the census of asteroids near Earth, including some of the most likely Earth impactors that may approach Earth during daylight and that cannot easily be discovered in most surveys that are observing at night, away from the Sun,” he added.
[12]
Astronomers will be able to get a better look at the asteroid when it isn’t blocked by the Sun from Earth in 2022. ®
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[7] https://carnegiescience.edu/news/solar-systems-fastest-orbiting-asteroid-discovered
[8] https://www.theregister.com/2021/08/12/nasa_bennu_collision/
[9] https://www.theregister.com/2021/05/26/ryugu_poros_boulders/
[10] https://www.theregister.com/2021/05/10/nasas_asteroid_sample/
[11] https://www.theregister.com/2021/07/13/airbus_commsat_crashing_plan/
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[13] https://whitepapers.theregister.com/
The asteroid, known as 2021 PH 27 , was clocked on August 13 by Scott Sheppard of the Carnegie Institution for Science in the US. He noticed the object in images taken by Ian Dell’antonio and Shenming Fu, of Brown University, using the 570-megapixel Dark Energy Camera on the Victor M. Blanco telescope in Chile.
Rather than live in the asteroid belt between Mars and Jupiter, PH 27 was observed much closer to our star. In fact, during its orbit, PH 27 gets closer to the Sun than Mercury: the rock's shortest distance to the star is just 20 million kilometres (12 million miles), at which point its surface has the lead-melting temperature of 480°C (900°F). PH 27 's 113-day orbit has a semi-major axis of 70 million kilometres (43 million miles), and it crosses the orbits of Mercury and Venus.
[1]
David Tholen of the University of Hawaii calculated PH 27 ’s path around the Sun from its position in the images. Over the next few days, as word of the exciting strange rock emerged, astronomers at other observatories used Tholen's calculations to point their telescopes at where the asteroid ought to be, and they too [2]sighted PH 27 .
[3]
[4]
“Though telescope time for astronomers is very precious, the international nature and love of the unknown make astronomers very willing to override their own science and observations to follow up new, interesting discoveries like this,” Sheppard [5]said on Monday.
The race was on to confirm Sheppard and Tholen's findings before the space rock disappeared from view.
[6]
“Because the object was already in the Sun’s glare and moving more toward it,” Tholen [7]said , "it was imperative that we determine the object’s orbit before it was lost behind our central star. I surmised that for an asteroid this size to remain hidden for so long, it must have an orbit that keeps it so near to the Sun that it is difficult to detect from Earth’s position.”
[8]Good news: There's a slightly increased chance of asteroid Bennu hitting Earth. Bad news: It's still really slight
[9]Astroboffins think strangely porous boulders found on asteroid Ryugu may be the stuff of proto-planets
[10]NASA's first asteroid sample on its way to Earth after OSIRIS-REx boosts for home
[11]Euro space boffins hatch comms satellite hijack plan to save Earth from extinction
Since PH 27 lives so close to the Sun, and has a relatively low mass, it experiences general relativistic effects more so than any other known Solar System object, according to the US National Science Foundation's NOIRLab. Its orbit also is unstable, and astronomers reckon in a few million years or so it’ll either be destroyed in a collision with Mercury or Venus, burn up from getting too close to the Sun, or be kicked out of its orbit by other bodies.
“Most likely PH 27 was dislodged from the Main Asteroid Belt between Jupiter and Mars and the gravity of the inner planets shaped its orbit into its current configuration,” Sheppard said.
“Although, based on its large angle of inclination of 32˚, it is possible [it] is an extinct comet from the outer Solar System that ventured too close to one of the planets as the path of its voyage brought it into proximity with the inner Solar System.”
“Understanding the population of asteroids interior to Earth’s orbit is important to complete the census of asteroids near Earth, including some of the most likely Earth impactors that may approach Earth during daylight and that cannot easily be discovered in most surveys that are observing at night, away from the Sun,” he added.
[12]
Astronomers will be able to get a better look at the asteroid when it isn’t blocked by the Sun from Earth in 2022. ®
Get our [13]Tech Resources
[1] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/science&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2YSTDYTiGhmPLFCf@37QedgAAAIk&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0
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[7] https://carnegiescience.edu/news/solar-systems-fastest-orbiting-asteroid-discovered
[8] https://www.theregister.com/2021/08/12/nasa_bennu_collision/
[9] https://www.theregister.com/2021/05/26/ryugu_poros_boulders/
[10] https://www.theregister.com/2021/05/10/nasas_asteroid_sample/
[11] https://www.theregister.com/2021/07/13/airbus_commsat_crashing_plan/
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Re: I had asteroids once
Martijn Otto
Don't you mean assteroids ?
Boffins ponder where Usain Bolt of space rocks came from
Ken Moorhouse
They've found Russell's Teapot.
Dr Paul Taylor
No, [1]Russell's Teapot orbits between Earth and Mars. This is [2]Vulcan . which is actually more important in the history of science.
[1] https://en.wikipedia.org/wiki/Russell%27s_teapot
[2] https://en.wikipedia.org/wiki/Vulcan_(hypothetical_planet)
Eclectic Man
Are you sure it is not Icarus?
Oh, hang on, that name is already taken:
"1566 Icarus, provisional designation 1949 MA, is an extremely eccentric asteroid, approximately 1.4 km (0.87 mi) in diameter. It is a near-Earth object of the Apollo group and the lowest numbered potentially hazardous asteroid. In 1968, it became the first asteroid ever observed by radar. Its orbit brings it closer to the Sun than Mercury and further out than the orbit of Mars, which also makes it a Mercury-, Venus-, and Mars-crosser. This stony asteroid and relatively fast rotator was discovered by German astronomer Walter Baade at the Palomar Observatory, California, on 27 June 1949. It was named after the mythological Icarus."
https://en.wikipedia.org/wiki/1566_Icarus
High speed, low mass
MarkET
Probably Elon's car come back. Battery flat.
I had asteroids once
The Doctor gave me this cream…