Isro Chandrayaan 4 Mission With Japan
ISRO and JAXA, the Indian Space Agency and Japan Space Agency, have joined forces for an upcoming lunar exploration endeavor scheduled for launch in 2026. Termed the Lunar Polar Exploration Mission (Lupex) and Chandrayaan-4, this collaborative effort stems from an Implementation Arrangement signed by ISRO in December 2017, focusing on pre-phase A and phase A studies. The feasibility report, completed in March 2018, emerged from a collaborative initiative with the Japan Aerospace Exploration Agency, with the primary goal of investigating water sources on the Moon, initially identified by ISRO Chandrayaan-1 mission through observational data.
The Chandrayaan-4 mission aims to deploy an unmanned lunar lander and rover to investigate the southern pole region of the Moon. The H3 launch vehicle, currently in construction by the Japan Aerospace Exploration Agency, will facilitate the launch of Chandrayaan-4. The H3 Launch Vehicle boasts a payload capacity of 4,000 kg to Sun-synchronous orbit (SSO), 7,900 kg to Geostationary Transfer Orbit (GTO), and 28,300 kg to low Earth orbit. Employing liquid-propellant rockets with strap-on solid rocket boosters, the first launch attempt on March 7, 2023, unfortunately, resulted in failure, with a cost per launch estimated at $50 million.
Chandrayaan-4 total payload mass for the mission, comprising the lander and rover, is expected to be 350 kg, and the mission duration is slated for six months. The rover will carry diverse payloads from JAXA and ISRO, featuring a 1.5-meter drill designed to explore the lunar surface. This drill will heat lunar material, measuring changes in mass while identifying volatiles within the material. The mission overarching objective is to assess the actual quantity of water in the Moon south pole region through a combination of observational data, in situ experiments, and ground truth data. This comprehensive study aims to inform future lunar colonies, determining the extent to which water can be sourced locally on the Moon versus being transported from Earth.
