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According to researchers from the University of Hawaii’s Institute of Astronomy, the asteroid Apophis is getting faster on its way to Earth.
Officially it is now under the Yarkovsky effect, which means that some parts of the asteroid are heating up faster than other parts.
“Before the detection of Yarkovsky’s acceleration on Apophis, astronomers had concluded that a potential impact with the Earth in 2068 was impossible. The detection of this effect acting on Apophis means that the 2068 impact scenario is still a possibility, “reports the University.
But Earth will first have a long-range date with the 330-meter-wide asteroid in 2029.
“We have known for a long time that an impact with the Earth is not possible during the close approach of 2029,” said Dave Tholen, who has carefully tracked Apophis’ movement in the sky since his team discovered it in 2004. ” New observations we got with the Subaru telescope earlier this year were good enough to reveal Apophis’ Yarkovsky acceleration, and show that the asteroid is moving away from a purely gravitational orbit of about 170 meters per minute. year, which is enough to keep the 2068 impact scenario in play. “
The giant space rock is appropriately codenamed 99942 Apophis, the Greek name for an Egyptian serpent god bent on swallowing the sun. (For the record, it’s also the name of a “Stargate-SG1” character with a similar motivation.)
2029 visit
There is no need to freak out. Apophis will miss Earth by a good 31,000 km in 2029. However, its size and relatively close distance to Earth mean its flyby will be a special time for astronomers and other scientists.
“Apophis’ close approach in 2029 will present an incredible opportunity for science,” Marina Brozović, radar scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California, said in a NASA statement. According to NASA, it is relatively rare for such a large object to pass this close to Earth.
“We will observe the asteroid with both optical and radar telescopes,” Brozović said. “With radar observations, we may be able to see surface details as small as a few meters.”
Indeed, Apophis can even be visible to the naked eye as a bright spot of light.
“When the asteroid crosses the Atlantic Ocean, its path briefly changes from red to gray – this is the closest approach,” explains a predictive model from NASA. “After the closest approach, the asteroid will move into the daytime sky and will no longer be visible.”
For ordinary civilians who have even a fleeting fear of being decimated by space debris, it is very comforting to know that the scientific community is genuinely excited about the arrival of a huge rock named after a god of death.
It appears that Apophis may indeed be a generous god and provide scientists with a lot of information on what to do if a more dangerous near-Earth object ever gets in our way.
“Apophis is a representative of approximately 2,000 currently known potentially dangerous asteroids (PHAs),” Paul Chodas, director of the Center for Near Earth Objects Studies, said in the release. “By observing Apophis during its 2029 flyby, we will gain important scientific knowledge that could one day be used for planetary defense.”
2068 visit
The Unversity of Hawaii says observations are underway to refine the magnitude of the Yarkovksy effect and how it affects Apophis’ orbit. Astronomers will know well before 2068 if there is any possibility of impact.
– with CNN
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