天问二号第一站“拜访”谁？路上要干啥？

Core Viewpoint - The successful launch of the Tianwen-2 probe marks the beginning of its mission to explore the asteroid 2016 HO3, which is considered a near-Earth satellite and holds significant scientific value for understanding the early solar system [1][2]. Group 1: Mission Objectives - The Tianwen-2 probe will take nearly a year to approach asteroid 2016 HO3, requiring multiple trajectory adjustments as it gets closer [2]. - The mission aims to gather detailed information about the asteroid's rotation axis, actual rotation period, size, shape, structure, surface conditions, and albedo [2]. - The probe will also identify suitable sampling points while avoiding adverse conditions that could affect the sampling process [2]. Group 2: Scientific Significance - Asteroid 2016 HO3 is considered a "living fossil" that retains primordial information from the early solar system, making it valuable for research on the composition, formation, and evolutionary history of the solar system [1]. - The proximity of the asteroid, located between 14 million to 40 million kilometers from Earth, allows for a lower energy requirement for the spacecraft to reach it [1]. Group 3: Technical Specifications - The Tianwen-2 probe weighs approximately 2.1 tons and has a wingspan of 15 meters, comparable to the weight of a small car and the length of a large bus [1]. - It is equipped with advanced scientific instruments, including a GNC system, to enhance its navigation capabilities in space [1].