On the second anniversary of the launch of Tianwen-1, it returned high-definition images of the potato-shaped “Phobos” – yqqlm

IT House news on July 23, according to the official WeChat account of the Lunar Exploration and Aerospace Engineering Center “China Lunar Exploration Project”, July 23 is the second anniversary of the launch of the Tianwen-1 mission.The orbiter sends back Phobos imagery.

IT House learned that the Tianwen-1 operation team has recently seized the opportunity when the orbiter is closer to Phobos.Imaging Phobos with a high-resolution cameraa clear image of the “full moon” state was obtained.

The Lunar Exploration and Aerospace Engineering Center pointed out that Phobos (Forbes) is one of the two natural satellites of Mars, with a size of about 27 kilometers × 22 kilometers × 18 kilometers, and runs at an altitude of about 6,000 kilometers from the surface of Mars. Near circular orbit, around Mars about 3 times a day. The orbiter runs on a polar elliptical orbit with an altitude of about 220 kilometers at the perigee point and an altitude of about 10,800 kilometers at the far point of fire, with a period of about 7 hours. Due to the orbital relationship between Phobos and the orbiter, as well as the lighting requirements during imaging, the operation team accurately calculated and controlled it.A clear image with a resolution of about 50 meters was obtained when the two were about 5100 kilometers apart.

According to reports, the image shows that Phobos is a small irregularly shaped celestial body, in the shape of a potato,The fringes distributed on the surface can be seen in the upper left of the figure, which may be formed by the impact of the impact process.There is an obvious impact crater in the upper right part of the picture, about 2 kilometers in diameter, called Öpik crater (Upik is an Estonian astronomer, famous for studying asteroids and meteorites).