Subscribe free to our newsletters via your
. 24/7 Space News .




IRON AND ICE
Arecibo Observatory Finds Asteroid 2012 LZ1 To Be Twice As Big As First Believed
by Staff Writers
Arecibo, Puerto Rico (SPX) Jun 25, 2012


Asteroid 2012 LZ1 is roughly spherical and rotates once around every 10-15 hours. This detailed image was taken when the asteroid was 10 million kilometers (6 million miles) away. The resolution is 7.5 m (25 feet), equivalent to seeing a basketball in New York City from Puerto Rico.

Using the planetary radar system at Arecibo Observatory, astronomers have determined that asteroid 2012 LZ1 is twice as large as originally estimated based on its brightness, and large enough to have serious global consequences if it were to hit the Earth. However, a new orbit solution also derived from the radar measurements shows that this object does not have any chance of hitting the Earth for at least the next 750 years.

Asteroid 2012 LZ1 was discovered on June 10, 2012, at Siding Spring Observatory in Australia, and was classified as potentially hazardous by the Minor Planet Center because its preliminary orbit brings it close to Earth (within 20 lunar distances).

Scientists at Arecibo observed the asteroid on June 19, 2012, to measure its orbit more precisely and to determine its size, rotation rate, and shape, and found it to be about 1 kilometer (0.6 miles) in its largest dimension. The new size determination suggests that 2012 LZ1 must be quite dark, reflecting only 2-4% of the light that hits it.

"The sensitivity of our radar has permitted us to measure this asteroid's properties and determine that it will not impact the Earth at least in the next 750 years," said Dr. Mike Nolan, Director of Planetary Radar Sciences at Arecibo Observatory.

Dr. Ellen Howell added: "This object turned out to be quite a bit bigger than we expected, which shows how important radar observations can be, because we're still learning a lot about the population of asteroids."

Scientists who worked on this investigation: Ellen S. Howell (Arecibo Observatory), Michael C. Nolan (Arecibo Observatory), Israel Cabrera (Arecibo Observatory), Jon Giorgini (Jet Propulsion Laboratory), and Marina Brozovic (Jet Propulsion Laboratory).

.


Related Links
Arecibo Observatory
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
Dawn Easing into its Final Science Orbit
Pasadena CA (JPL) Jun 18, 2012
After successfully completing nearly five months scrutinizing the giant asteroid Vesta at its lowest orbit altitude, NASA's Dawn spacecraft will begin its final major science data-gathering phase at Vesta on June 15, at an average altitude of 420 miles (680 kilometers) above the surface. Over the past six weeks, Dawn has been gently spiraling up from its lowest orbit - 130 miles, or 210 ki ... read more


IRON AND ICE
Researchers Estimate Ice Content of Crater at Moon's South Pole

Researchers find evidence of ice content at the moon's south pole

Nanoparticles found in moon glass bubbles explain weird lunar soil behaviour

UA Lunar-Mining Team Wins National Contest

IRON AND ICE
Extensive Water in Mars Interior

Orbiter Out of Precautionary 'Safe Mode'

Researchers calculate size of particles in Martian clouds of CO2 snow

ESA tests self-steering rover in 'Mars' desert

IRON AND ICE
Complex Challenges Solved In Tech Meetings For Commercial Crew Program

Boeing Completes Key Reviews of Space Launch System

Two NASA Visualizations Selected for Computers Graphics Showcase

NASA technology-sharing portal announced

IRON AND ICE
Man Versus Machine on Shenzhou

Above and below, Chinese science soars

China conducts first manual space docking

That's No Lab, It's a Space Station

IRON AND ICE
New Space Station Crew Confirmed

Spacewalk to work on ISS scheduled

Did You Say 1.2 Billion Particles Per Month?

Varied Views from the ISS

IRON AND ICE
USAF officials announce milestone Atlas V launch

EVE Underflight Calibration Sounding Rocket Launch

ILS and AsiaSat Announce a New Contract for an ILS Proton Launch

A milestone in launcher preparations for Arianespace's fourth Ariane 5 flight of 2012

IRON AND ICE
Forgotten Star Cluster Useful For Solar Science And Search for Earth Like Planets

SciTechTalk: Quick, name the planets!

Where Are The Metal Worlds And Is The Answer Blowing In The Wind

Metal-poor stars are rich with small planets

IRON AND ICE
IT security problems shift as data moves to 'cloud'

Samsung eyes 10 mn mark for Galaxy S3 by end of July

ISS to Build Up Meteorite Defenses

Smartphones put writing on the wall for paid texts




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