蜜臀av性久久久久|国产免费久久精品99|国产99久久久久久免费|成人精品一区二区三区在线|日韩精品一区二区av在线|国产亚洲欧美在线观看四区|色噜噜综合亚洲av中文无码|99久久久国产精品免费播放器

Intermediate-sized near-Earth asteroid to fly safely past Earth next month

Source: Xinhua| 2018-01-20 16:20:57|Editor: pengying

LOS ANGELES, Jan. 19 (Xinhua) -- An intermediate-sized near-Earth asteroid will make a close approach to the Earth on Feb. 4, but it will have no chance of colliding with our planet, the U.S. National Aeronautics and Space Administration (NASA) said Friday.

At the time of closest approach, the asteroid will be no closer than 10 times the distance between Earth and the Moon, said a press release from NASA.

Known as 2002 AJ129, the asteroid is categorized as a Potentially Hazardous Asteroid (PHA), which is defined by NASA as Near-Earth Asteroids "with an Earth Minimum Orbit Intersection Distance (MOID) of 0.05 astronomical units or less and an absolute magnitude of 22.0 or less."

But 2002 AJ129 does not pose an actual threat of colliding with our planet for the foreseeable future. It is one of over 1,000 asteroids and comets scientists currently know about that falls under the PHA category.

"We have been tracking this asteroid for over 14 years and know its orbit very accurately," Paul Chodas, manager of NASA's Center for Near-Earth Object Studies at the Jet Propulsion Laboratory, was quoted as saying by the news release. "Our calculations indicate that asteroid 2002 AJ129 has no chance - zero - of colliding with Earth on Feb. 4 or any time over the next 100 years."

The rock is somewhere between 0.5 km and 1.2 km in width - by comparison, Burj Khalifa, the world's tallest building in Dubai, United Arab Emirates, is about 0.82 km tall.

The asteroid was discovered on Jan. 15, 2002, by the former NASA-sponsored Near Earth Asteroid Tracking project at the Maui Space Surveillance Site on Haleakala, Hawaii. It will make a close approach to Earth on Feb. 4. at 1:30 p.m. PST (2030 GMT) within about 4.2 million km.

The asteroid's velocity at the time of closest approach, 34 km per second, is higher than the majority of near-Earth objects during an Earth flyby.

The high flyby velocity is a result of the asteroid's orbit, which approaches very close to the Sun -- 18 million km.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001369109581
黎平县| 和田县| 疏勒县| 榆中县| 普安县| 威宁| 庐江县| 清河县| 乌拉特中旗| 丰台区| 崇左市| 星座| 马边| 福州市| 电白县| 尉氏县| 沾益县| 廉江市| 那曲县| 九龙县| 潜山县| 昆山市| 塔河县| 叶城县| 含山县| 诸暨市| 车致| 井研县| 寻乌县| 定日县| 林口县| 凭祥市| 丰都县| 黄浦区| 阜新市| 福建省| 慈溪市| 开封县| 资溪县| 南乐县| 锡林郭勒盟|