The Korea Institute of Astronomy and Space Sciences revealed the surface and 3D shape of the 'Paeton' asteroid.
The Korea Institute of Astronomy and Space Sciences observes the Phaeton with its subordinate observation facilities in mid-December 2017, the closest to Earth in 40 years. Upon analyzing it, we found that the surface of the phaeton was chemically homogeneous and rotated clockwise once every 3,604 hours, and released a reconstructed 3D model. According to the model, the phaeton is shaped like a diamond with high equatorial regions.
Asteroids under investigation by Japan's Aerospace Exploration Agency (JAXA), Hayabusa 2, and NASA's OSIRIS-REX, are in a similar fashion.
The asteroid reflects the sunlight without shining. Thus, if there is data recording the amount of light reflected from various planes as the asteroid rotates and rotates, it can reconstruct not only the asteroid's rotation period, but also the direction of the axis of rotation and the three-dimensional shape. This is called the & quot; reverse photometric curve & quot; method. Based on this principle, the researchers analyzed the period of change in phaeton brightness, revealing a rotation period of 3,604 hours.
In another study, we observed changes in the spectrum during phaeton rotation and, as a result, no change was observed, confirming that the surface was chemically homogeneous.
Surface homogeneity was reaffirmed as a result of the calculation that thermal denaturation by solar heat occurs uniformly throughout the surface. Moon Hong-gyu, Moon researcher, said: "From November 11 to December 17, 2017, when Paeton approached Earth 27 times from the Moon-Earth period, the Moon Moon observatories of 1.8m at the Bohyeonsan Observatory, 0.6 m in the Sobaeksan Observatory, In addition to the 0.5 m telescope of the space object's electro-optical surveillance network and the 0.6 m telescope of the National University of Chungbuk Observatory, we acquired data from 8 research facilities in Taiwan, Uzbekistan and Kazakhstan, The results are the only research results based on the observations. " "The planetary exploration of the solar system must be supported by research results such as precise orbit, shape, rotation characteristics and distribution of the target object's surface material obtained from the terrestrial observation facility," he said. I think it will be used as basic data for the exploration of proximity. "
The results of the research on the period of rotation, direction of rotation axis and 3D shape of the phaeton are published in the Journal of the Astronomy and Astrophysics, November 14, 2018, It was posted.
[ⓒ 매일경제 & mk.co.kr, 무단전재 및 재배포 금지]