Apophis, named after the god of chaos, may attack the earth in 2068. A potential strike is equivalent to an explosion of 880 million tons of trinitrotoluene (TNT).
Astronomer Dave Tholen and his colleagues have confirmed the discovery of a small Yarkovsky acceleration on the surface of the asteroid.
The Yarkovsky effect is when an asteroid or celestial body changes its orbit due to a small amount of thermal thrust.
This may be due to exhaust gas or gravitational motion from celestial bodies including the sun and the earth.
It may cause a slight thermal reaction, thereby changing the path of the asteroid.
Apophis was first discovered by experts at Kitt Peak National Observatory in Arizona on June 1
Astronomers discovered that the asteroid accelerated when observed with the Subaru telescope earlier this year.
According to Mr. Tolan, the probability that Apophis will hit the earth in 2068 is one in 530,000.
Mr. Tolan said: “For some time, we have known that the close observations in 2029 will not affect the Earth.
“The new observations we obtained with the Subaru telescope earlier this year are sufficient to reveal the Yarkovsky acceleration and show that the asteroid drifts about 170 meters from a pure gravity orbit each year, enough to keep the 2068 impact scenario in effect. .”
A statement issued by the University of Hawaii wrote: “All asteroids need to radiate the energy they absorb from sunlight as heat to maintain thermal balance. This process will slightly change the asteroid’s orbit.
“Before the Yakovsky acceleration on Apofis was detected, astronomers concluded that it was impossible to have a potential impact on the Earth in 2068.
“The detection of this impact on Apophis means that there is still an impact scenario for 2068.
He said: “Further observations are being made to improve the magnitude of the Yakovsky effect and how it affects the orbit of Apophis.
“Astronomers will know whether it may be affected by 2068.”
Before NASA revealed that it was planning a mission to a metal asteroid worth about 770 billion pounds (US$100 million), it issued a warning.
The asteroid called 16 Psyche is about 140 miles in diameter. It is one of the largest objects in the main asteroid belt orbiting between Mars and Jupiter.
Dr. Tracy Becker, a planetary scientist at the Southwest Research Institute, said: “We have seen meteorites. Most of them are metallic, but Saikey may be unique because it may be an asteroid made entirely of iron and nickel.