151 days! Discovery of Asteroids with the Shortest Turning Period in the Solar System

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 151 days! Discovery of Asteroids with the Shortest Turning Period in the Solar System


Beijing, July 10, Science and Technology Daily (Reporter Liu Xia) According to the report of the Physicist Organization Network on July 9, American astronomers have discovered an unusual rocky asteroid 2019LF6 in the solar system. Its diameter is about 1 kilometer and its revolution period is about 151 days, which is the shortest one-year discovery of asteroids so far.

The team of astronomers at California Institute of Technology used the Zwicky Transient Facility (ZTF) at Mount Palomar Observatory to successfully target the asteroid Atira. Adina is an asteroid whose perihelion and apohelion are both within Earth orbit. From Earths point of view, such asteroids are hiding behind bright sunlight, making them extremely difficult to detect. Adinas asteroid observation window is very short, only about 20 to 30 minutes before and after sunset, when the ZTF camera can scan around the sun without being blinded by the intense glare. So far, scientists have found only 20 such asteroids in the solar system.

Systematic observations of asteroids began 30 years ago, but LF6 was never discovered in 2019, mainly because of its unusual orbit, said Ye Quanzhi, a postdoctoral scholar at California Institute of Technology.

Generally speaking, most asteroids orbit on the ecliptic surface of the solar system, but the orbital planes of LF6 in 2019 and AQ3 in February of this year deviate significantly from the ecliptic surface. Scientists believe that this may be due to the gravitational interference of Venus or Mercury in the past. Ye Quan hopes to find more Adina asteroids. He expects NASAs proposed NEOCam mission to find asteroids closer to the sun. NEOCam will capture the infrared or thermal characteristics of asteroids. Because Adina asteroids are closer to the sun and warmer than other asteroids, they are brighter in infrared light, he said. Located in space, NEOCam has the dual advantages of location and infrared observation, making it easier to locate these asteroids than ground-based telescopes. Source of this article: responsible editor of Science and Technology Daily: Wang Fengzhi_NT2541

Generally speaking, most asteroids orbit on the ecliptic surface of the solar system, but the orbital planes of LF6 in 2019 and AQ3 in February of this year deviate significantly from the ecliptic surface. Scientists believe that this may be due to the gravitational interference of Venus or Mercury in the past.

Ye Quan hopes to find more Adina asteroids. He expects NASAs proposed NEOCam mission to find asteroids closer to the sun. NEOCam will capture the infrared or thermal characteristics of asteroids.

Because Adina asteroids are closer to the sun and warmer than other asteroids, they are brighter in infrared light, he said. Located in space, NEOCam has the dual advantages of location and infrared observation, making it easier to locate these asteroids than ground-based telescopes.