“老将”立“新功” 天问二号“专属座驾”有这些看点

Group 1 - The Long March 3B rocket was successfully used to launch the Tianwen-2 probe, marking a significant milestone in China's space exploration efforts [1][4] - The Long March 3B rocket has a high reliability and has completed over 100 launches, making it a trusted choice for major space missions [1][2] - The rocket's payload capacity for geostationary transfer orbit has been enhanced to 5.55 tons, aligning well with the requirements of the Tianwen-2 probe [2] Group 2 - The Tianwen-2 mission targets the small asteroid 2016 HO3, which presents challenges due to its small size and weak gravity, necessitating high precision in rocket trajectory [3] - The launch required achieving a separation speed exceeding 11.2 kilometers per second, with a speed deviation limit of 1 meter to avoid significant trajectory errors [3] - The mission's launch window was highly constrained, requiring a "zero window" launch to optimize fuel efficiency, which was achieved through streamlined flight procedures [3]