Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




IRON AND ICE
"All-Clear" Asteroid Will Miss Earth in 2040
by Staff Writers
Hilo HI (SPX) Dec 24, 2012


The updated trajectory of 2011 AG5, based on the Gemini data, has a factor of 60 less uncertainty than the previous observations due in part to the increase in sampling points in the asteroid's orbit. The original discovery was made from images obtained with the NASA-sponsored Catalina Sky Survey on Mt. Lemmon in Arizona.

Using the Gemini North telescope on Mauna Kea, Hawai'i a team of astronomers from the University of Hawaii's Institute for Astronomy (IfA) have confirmed that the chance of asteroid 2011 AG5 impacting Earth in 2040 is no longer a significant risk - prompting a collective sigh-of-relief.

Previously, scientists estimated that the risk of this 140-meter-diameter (about the length of two American football fields) asteroid colliding with the Earth was as high as one in 500.

If this object were to collide with the Earth it would have released about 100 megatons of energy, several thousand times more powerful than the atomic bombs that ended World-War II. Statistically, a body of this size could impact the Earth on average every 10,000 years.

The observations, using the Gemini Multi-Object Spectrograph (and imager), were especially challenging said team-member Richard Wainscoat. "These were extremely difficult observations of a very faint object," he said. "We were surprised by how easily the Gemini telescope was able to recover such a faint asteroid so low in the sky." The Gemini observations were made on October 20, 21, and 27, 2012.

In addition to multiple observations since the asteroid's discovery, the team had also acquired images about two weeks earlier with the University of Hawai'i 2.2-meter telescope also on Mauna Kea - however, these data were all less conclusive and required confirmation.

Gemini was able to make the follow-up observations rapidly due to the observatory's scheduling flexibility and availability of several instruments at a moment's notice.

IfA astronomers David Tholen, Richard Wainscoat, Marco Micheli, and Garrett Elliott conducted the original observations and analysis of the data. Further analysis was performed at NASA's Near-Earth Object Program Office at the Jet Propulsion Laboratory (JPL) in Pasadena, California.

The updated trajectory of 2011 AG5, based on the Gemini data, has a factor of 60 less uncertainty than the previous observations due in part to the increase in sampling points in the asteroid's orbit. The original discovery was made from images obtained with the NASA-sponsored Catalina Sky Survey on Mt. Lemmon in Arizona.

According to a press release issued by JPL, while this new result has reduced the interest in 2011 AG5, the experience gained by studying this object and conducting a contingency deflection analysis has demonstrated that astronomers, using NSF and NASA facilities, are well poised to detect and predict the trajectories of Earth-threatening asteroids in the future.

The data for this study are being published by the Minor Planet Center in Cambridge, Massachusetts.

.


Related Links
University of Hawai'i - Institute for Astronomy
Asteroid and Comet Mission News, Science and Technology






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





IRON AND ICE
Asteroid Toutatis Slowly Tumbles by Earth
Pasadena CA (JPL) Dec 17, 2012
Scientists working with NASA's 230-foot-wide (70-meter) Deep Space Network antenna at Goldstone, Calif., have generated a series of radar data images of a three-mile-long (4.8-kilometer) asteroid that made its closest approach to Earth on Dec. 12, 2012. The images that make up the movie clip were generated with data taken on Dec. 12 and 13, 2012. On Dec. 12, the day of its closest approach ... read more


IRON AND ICE
GRAIL Lunar Impact Site Named for Astronaut Sally Ride

NASA probes crash into the moon

No plans of sending an Indian on moon

Rocket Burn Sets Stage for Dynamic Moon Duos' Lunar Impact

IRON AND ICE
Clays on Mars: More Plentiful Than Expected

Opportunity For Some Shoulder Workout At Copper Cliff

Enabling ChemCam to Measure Key Isotopic Ratios on Mars and Other Planets

Curiosity Rover Explores 'Yellowknife Bay'

IRON AND ICE
NASA Puts Orion Backup Parachutes to the Test

White House to honor scientists, inventors

TDRS-K Arrives at Kennedy for Launch Processing

Sierra Nevada Corporation Selected by NASA to Receive Human Spaceflight Certification Products Contract

IRON AND ICE
Mr Xi in Space

China plans manned space launch in 2013: state media

China to launch manned spacecraft

Tiangong 1 Parked And Waiting As Shenzhou 10 Mission Prep Continues

IRON AND ICE
Expedition 34 Spends Christmas in Space

Three astronauts blast off for ISS in Russian craft

Soyuz rocket brings trio to space station

ISS Orbit Raised Ahead of Crew Arrival

IRON AND ICE
Ariane 5 ECA orbits Skynet 5D and Mexsat Bicentenario satellites

Payload integration complete for final 2012 Ariane 5 mission

Arctic town eyes future as Europe's gateway to space

ISRO planning 10 space missions in 2013

IRON AND ICE
Closest sun-like star may have planets

Nearby star is good candidate for Earth-like planets

Venus transit and lunar mirror could help astronomers find worlds around other stars

Astronomers discover and 'weigh' infant solar system

IRON AND ICE
Berkeley Lab Scientists Developing Quick Way to ID People Exposed to Ionizing Radiation

All Systems Go for Highest Altitude Supercomputer

Space Fence program moving forward

Aldrich Materials Science discovers liquid-free preparation of metal organic frameworks




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement