Koreans discover dangerous asteroid
Marked inside a yellow circle, the 2018 PP29 is the first hazardous asteroid found by Korean scientists. It has a one in 2.8 billion chance of colliding with Earth in 2063 or 2069. [KOREA ASTRONOMY AND SPACE SCIENCE INSTITUTE]
The potentially hazardous asteroid (PHA), provisionally labeled 2018 PP29, earlier this month by the International Astronomical Union Minor Planet Center was discovered via orbital data collected from the Korea Microlensing Telescope Network (KMTNet), according to the Korea Astronomy and Space Science Institute.
The 1.6-meter (5.2-foot) diameter telescopes in Chile, Australia and South Africa discovered PP29 after 10 days of close monitoring, with the diameter of the object estimated to be 160 meters.
The asteroid’s closest approach to Earth’s orbit, or minimum orbit intersection distance (MOID), was less than 4.3 million kilometers (2.7 million miles). The object has a long semi-major axis with an elongated elliptical orbit and circles the Sun every 5.7 years.
As to the possibility of PP29 colliding with the Earth, the U.S. National Aeronautics and Space Administration estimated it could happen in 2063 and 2069, although the probability is extremely low at 2.8 billion to 1.
“This discovery is important because most PHA detections have been made by the United States and shows the potential of South Korea to play a greater row in space monitoring,” said Moon Hong-kyu, a research scientist at the space institute.
All space objects that are more than 140 meters across and come within the 7.5 million kilometer MOID are viewed as PHA, requiring close and constant monitoring, with a total of 1,981 objects discovered so far.
Local scientists have also discovered a smaller Near Earth Asteroid (NEA) called the 2018 PM28 after 44 days of observation. This asteroid is estimated to have a diameter of 20 to 40 meters.
Yonhap
with the Korea JoongAng Daily
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