NASA’s Hubble Space Telescope has recorded the never-before-seen break-up of an asteroid into as many as 10 smaller pieces.
Fragile comets, comprised of ice and dust, have been seen falling apart as they near the sun, but nothing like this has ever before been observed in the asteroid belt.
This series of Hubble Space Telescope images reveals the breakup of an asteroid over a period of several months starting in late 2013. The largest fragments are up to 180 meters (200 yards) in radius.
Image Credit: NASA, ESA, D. Jewitt (UCLA)
“This is a rock, and seeing it fall apart before our eyes is pretty amazing,” said David Jewitt of the University of California at Los Angeles, who led the astronomical forensics investigation.
The crumbling asteroid, designated P/2013 R3, was first noticed as an unusual, fuzzy-looking object by the Catalina and Pan STARRS sky surveys on Sept. 15, 2013. A follow-up observation on October 1 with the W. M. Keck Observatory on the summit of Mauna Kea, a dormant volcano on the island of Hawaii, revealed three bodies moving together in an envelope of dust nearly the diameter of Earth.
“The Keck Observatory showed us this thing was worth looking at with Hubble,” Jewitt said. “With its superior resolution, space telescope observations soon showed there were really 10 embedded objects, each with comet-like dust tails. The four largest rocky fragments are up to 400 yards in diameter, about four times the length of a football field.”
Hubble data showed the fragments drifting away from each other at a leisurely one mph. The asteroid began coming apart early last year, but new pieces continue to reveal themselves, as proved in the most recent images.
It is unlikely the asteroid is disintegrating because of a collision with another asteroid, which would have been instantaneous and violent by comparison to what has been observed. Debris from such a high-velocity smashup would also be expected to travel much faster than observed. Nor is the asteroid coming unglued due to the pressure of interior ices warming and vaporizing.
This leaves a scenario in which the asteroid is disintegrating due to a subtle effect of sunlight, which causes the rotation rate of the asteroid to gradually increase. Eventually, its component pieces — like grapes on a stem — succumb to centrifugal force and gently pull apart. The possibility of disruption in this manner has been discussed by scientists for several years, but never reliably observed.
For this scenario to occur, P/2013 R3 must have a weak, fractured interior — probably as the result of numerous non-destructive collisions with other asteroids. Most small asteroids are thought to have been severely damaged in this way. P/2013 R3 is likely the byproduct of just such a collision sometime in the last billion years.
With the previous discovery of an active asteroid spouting six tails, named P/2013 P5, astronomers are finding more evidence the pressure of sunlight may be the primary force causing the disintegration of small asteroids — less than a mile across– in our solar system.
The asteroid’s remnant debris, weighing about 200,000 tons, will in the future provide a rich source of meteoroids. Most will eventually plunge into the sun, but a small fraction of the debris may one day blaze across our skies as meteors.
The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA’s Goddard Space Flight Center in Greenbelt, Md., manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore conducts Hubble science operations. STScI is operated for NASA by the Association of Universities for Research in Astronomy, Inc., in Washington.
Contacts and sources:
J.D. Harrington
NASA Headquarters
Ray Villard
Space Science Telescope Institute, Baltimore, Md.
It was afraid of Niburu……
Hard to argue this sort of stuff…
“P/2013 R3 is likely the byproduct of just such a collision sometime in the last billion years”
… Interesting article and these ‘firsts’ are amazing. We are discussing this in another thread, i’ll invite them over.
There’s no proof they broke up. They could have been bunched up or aligned all along, and they just look like they split apart as the viewing angles change over time.
Yet we know the fragments are drifting apart at 1mph. Could you explain the grouping in that case? You might want to start by multiplying one billion years out to hours and check out how far apart the chunks could have been; given your argument.
It is like a slow-motion version of a comet breaking apart. What would take days for a comet is taking months or longer for this asteroid. Interesting.
They think the rotation imparted by sunlight got to a point that centrifugal forces broke the object apart. What puzzles me is why is it disintegrating into dust? Is it really that fragile or is there some other force at work?
why is this event just now being given to the public, i see it on the weather channel, fox, MSNBC etc . no one else is curious as to why they held on to the information for 6 months and just now it is everywhere?
If I had to guess as to why it was held back 6 months I’d say it is just a processing backlog. Digital astronomical images need offset, dark and flat calibration, alignment and stacking. Finally, post-processing is needed to get the color and stuff correct, plus put in text and whatnot.
I’d imagine that old data taken between other more important projects might get put on the back burner for a bit. But, you never know.
flint i agree with every thing you just said. but i look at the first image being oct 29, around the time that all the ison fanaticism began, almost to the day. then i add in to the equation the 3 astroid flybys on march 6 with the two fireballs also reported in canada and the southwest. even you yourself on multiple occasions have written about an uptick in fireball activity. something doesnt seem right with any of the information we recieve, it alwaysseems too coreographed, well timed or placed. good god this astroid breakup recieved more news airtime on all the news media outlets then comet ison.
i also believe between the october and nov images, there is ample time to atleast give some disclosure , some mention to some media outlet. though frankly i find this rather a non story to begin with, which in itself is even more wierd that it got the amount of attention it did
flint i would like to add that i had a series of neck xrays done yesterday, it took them all of 20 seconds to stack the images and create a report. the greatest illusions are created with misdirection