Asteroid closes in on Earth fly-by

A big asteroid is set to make its closest flyby of Earth in 200 years on Tuesday, but there is no chance of a crash landing when it zips by our planet, NASA said. Astronomers have aimed their telescopes to catch a glimpse of the 2005 YU55 asteroid, which will not be visible to the naked eye, when it makes its closest approach to Earth at 6:28 pm (1128 GMT).

The 1,300 feet (400 meter) wide asteroid often travels in the vicinity of the Earth, Mars and Venus, but "the 2011 encounter with Earth is the closest it has come for at least the last 200 years," the US space agency said. Other asteroids of this size pass by Earth more frequently, though the last such event happened in 1976 and the next will not happen again until 2028 when as asteroid called 2001 WN5 will skim about halfway between the Moon and Earth.

This asteroid is expected to pass a bit further away; about .85 times the distance of the Moon to the Earth, or a distance of 202,000 miles (325,000 kilometers). "2005 YU55 is one of the potentially hazardous asteroids that make close approaches from time to time because their orbits either approach or intersect the orbit of the Earth," said Robert McMillan, an associate research scientist at the University of Arizona.

McMillan discovered the asteroid in 2005 as part of the university's Spacewatch Project, a solar-system-scanning group of scientists near Tucson, Arizona. However, astronomers know from analyzing the trajectory of the asteroid that it will not hit Earth this time. The asteroid's next closest pass is set to take place in 2094, at a distance of 167,000 miles (269,000 kilometers), according to forecasts.

"The observations will give us a piece of the puzzle, one we don't get many chances to see," said Don Yeomans of NASA's Jet Propulsion Laboratory."At one time, we thought these were the asteroids that delivered carbon and other elements to the early Earth, so they are pretty important."

NASA said radar observations from the Arecibo Planetary Radar Facility in Puerto Rico have already begun as the asteroid closes in on its approach. While the charcoal-colored, circular asteroid's visit has scientists excited for the chance to get a closer look, most Earthlings probably will not notice a thing. "The gravitational influence of the asteroid will have no detectable effect on Earth, including tides and tectonic plates," NASA said.

Coming soon: e-bomb to 'numb' enemy

In the not too distant future, Indian armed forces would be equipped with "e-bomb", courtesy Terminal Ballistic and Research Laboratory (TBRL), one of the top defence research and development laboratories in the country.

Stated to be most lethal weapon after nuclear bombs, the TBRL is expected to finish the R&D work on the project within the 12th plan period.

Located on the outskirts of Chandigarh, the lone ballistic laboratory of Defence Research and Development Organisation ( DRDO), TBRL has developed the technology and is working on a weapon, which would be capable of neutralising the command, control and communication systems of the enemy. Confirming the development, TBRL director Dr Manjit Singh told TOI that such weapon would be capable of causing huge destruction, without affecting humans.

"It would be equally capable of damaging the communication system and other technologies ensuring maximum and sudden setback to the enemy," Singh added.

He said that the technology of 'e-bomb' or 'electromagnetic bomb' would be based on explosive-driven high-energy pulse power technology and can be deployed against enemy's other establishments like civil utility networks and power generation networks, to name a few.

A P S Sodhi, senior scientist of TBRL working on the project, said that to develop electromagnetic bombs, they are using explosive-driven high-energy pulse power technology, which can produce a pulse current of peak value 1.4 mega ampere from chemical energy released by 2.8 kg of high explosives.

The information about the 'e-bomb' was shared by TBRL scientists on Monday on the sidelines of a gathering called to apprise about an international conference which the organization is holding from November 10 to 12 at its field laboratory in Ramgarh near Panchkula. Leading global experts from India, USA, Israel UK, Russia, Germany, Australia, Ukraine, Czech Republic and Poland, among other countries, who will be sharing their expertise and knowledge on the latest technologies now in use in the world as well as the latest trends in research on a host of sensitive subjects.

The conference has been organised by High Energy Materials Society of India (HEMSI) with a view to help in strengthening country's defence, space and internal security system.