Arecibo astronomers prepare to obtain close images of a near-Earth asteroid

January 25, 2008

The Arecibo Observatory in Arecibo, Puerto Rico will observe a newly discovered asteroid on Jan. 27-28, as the object called 2007 TU24 passes within 1.4 lunar distances, or 334,000 miles, from Earth.

The asteroid, estimated at between 150 and 600 meters in diameter – about 500 feet to 1,900 feet, or the size of a football field, at 360 feet, to the size of Chicago’s 110-story Sears Tower, at 1,454 feet – was discovered by the University of Arizona’s Catalina Sky Survey in October 2007. It poses no threat to Earth, but its near approach gives Arecibo astronomers a golden opportunity to learn more about potentially hazardous near-Earth objects.

“We don’t yet know anything about this asteroid,” said Mike Nolan, head of radar astronomy at the Puerto Rico observatory. Such objects pass near Earth with relative frequency, he said – approximately one every five years or so – but it’s rare that astronomers have enough advance notice to plan for rigorous observing.

“Because it’s coming so close, we’ll get our highest quality imaging,” said Nolan.

Using Arecibo’s powerful radar, which is the most sensitive in the world, researchers will gauge the object’s size, observe its speed and measure its spin. Switching then to imaging mode, which will offer resolution to 7.5 meters – three times more precise than NASA’s Goldstone telescope, the only other radar telescope in the world – the researchers hope to map the object’s surface in detail. The Robert C. Byrd Green Bank Telescope, Green Bank, W.Va., will receive Arecibo’s echo from the asteroid and transmit its data back to Arecibo.

TU2 is one of an estimated 7,000 near-Earth objects, its size or larger – most have never been closely studied.

“We have good images of a couple dozen objects like this, and for about one in 10, we see something we‘ve never seen before,” said Nolan. “We really haven’t sampled the population enough to know what’s out there.”

Arecibo’s radar is vital for continuing to classify and understand such objects, said Cornell University assistant professor of astronomy Jean-Luc Margot. “Arecibo does a fantastic job at getting images, discovering the shape, spin and reflection properties of such an object . . . all these things that are important to know.”

The telescope will be trained on TU24 Jan. 27-28 and again Feb. 1-4. Goldstone’s planetary radar observed it Jan. 23-24.

Source: Cornell University


Rank 5 /5 (6 votes)
Tags

Relevant PhysicsForums posts
  • Never ending outer space.....
    createdFeb 11, 2012
  • Neutron Star fragments?
    createdFeb 11, 2012
  • stationary or not?
    createdFeb 11, 2012
  • Scale of the Universe
    createdFeb 10, 2012
  • Titan's lack of impact craters
    createdFeb 09, 2012
  • Real pictures of black hole eating a star?
    createdFeb 08, 2012
  • More from Physics Forums - General Astronomy

More news stories

Latin America mining boom clashes with conservation

Latin America is experiencing a mining boom as prices rise fuelled by a hike in global demand, but the region is also being hit by a wave of violent protests, strikes and rallies by environmentalists.

Space & Earth / Environment

created 20 hours ago | popularity 5 / 5 (1) | comments 1

Salvage workers begin pumping fuel from Italian shipwreck

Salvage workers Sunday began pumping fuel from the shipwrecked Italian cruise liner Costa Concordia, a day ahead of schedule, officials said.

Space & Earth / Environment

created 12 hours ago | popularity 5 / 5 (2) | comments 0

Political leaders play key role in how worried Americans are by climate change: study

More than extreme weather events and the work of scientists, it is national political leaders who influence how much Americans worry about the threat of climate change, new research finds.

Space & Earth / Environment

created Feb 06, 2012 | popularity 5 / 5 (8) | comments 75

NASA budget will axe Mars deal with Europe: scientists

US President Barack Obama's budget proposal to be submitted next week for 2013 will cut NASA's budget by 20 percent and eliminate a major partnership with Europe on Mars exploration, scientists said Thursday.

Space & Earth / Space Exploration

created Feb 10, 2012 | popularity 5 / 5 (4) | comments 58

Humans may have helped the decline of African rainforests 3000 years ago

(PhysOrg.com) -- Large areas of rainforests in Central Africa mysteriously disappeared over three thousand years ago, to be replaced by savannas. The prevailing theory has been that the cause was a change ...

Space & Earth / Environment

created Feb 10, 2012 | popularity 4.1 / 5 (14) | comments 21 | with audio podcast report


Scientists discover molecular secrets of 2,000-year-old Chinese herbal remedy

For roughly two thousand years, Chinese herbalists have treated Malaria using a root extract, commonly known as Chang Shan, from a type of hydrangea that grows in Tibet and Nepal. More recent studies suggest that halofuginone, ...

New method to examine batteries -- MRI from the inside

There is an ever-increasing need for advanced batteries for portable electronics, such as phones, cameras, and music players, but also to power electric vehicles and to facilitate the distribution and storage of energy derived ...

A mitosis mystery solved: How chromosomes align perfectly in a dividing cell

Although the process of mitotic cell division has been studied intensely for more than 50 years, Whitehead Institute researchers have only now solved the mystery of how cells correctly align their chromosomes during symmetric ...

Google might launch Drive for cloud storage soon

(PhysOrg.com) -- Google's next big move, according to the Wall Street Journal, is a cloud storage service called Drive. Hardly first to the plate, Google is simply catching up to introducing its cloud reposi ...

Lab study raises questions over nano-particle impact

Tests involving chickens have raised questions about the impact on health from engineered nano-particles, the ultra-fine grains commonly used in drugs and processed foods, scientists said on Sunday.

Starve a virus, feed a cure? Findings show how some cells protect themselves against HIV

A protein that protects some of our immune cells from the most common and virulent form of HIV works by starving the virus of the molecular building blocks that it needs to replicate, according to research published online ...