We will hold a press conference to provide an update on the HAKUTO-R Mission 2 Technical Cause Analysis on June 24, 2025 at 10:00 a.m. JST. (01:00 UTC)
The laser rangefinder was designed to provide altitude data when the spacecraft was at least three kilometers above the surface, triggering engines for the final landing burn. However, the unit did not provide its first altitude measurement until it was less than 900 meters high.The lander then attempted rapid deceleration, but by that point it was traveling much faster than planned: 66 meters per second versus the 44 meters per second planned. The last telemetry received from the lander, at an altitude of 192 meters, showed it was still descending at 42 meters per second.
ispace, inc. announced today that it has completed the analysis of flight data of “SMBC x HAKUTO-R VENTURE MOON” of Mission 2, obtained by the HAKUTO-R Mission Control Center, regarding the landing sequence of the RESILIENCE lander on June 6, 2025.The analysis identifies an anomaly in the Laser Range Finder (LRF) that resulted in the hard landing, narrowed down the most likely causes of the anomaly, and completed the consideration of countermeasures and analysis of the impact on subsequent missions.Mission 2: Analysis of factors contributing to the hard landing • At a June 6, 2025, press conference, ispace announced: 1. during the final phase of the landing, the lander’s attitude was nearly vertical, 2. the acquisition of valid measurements from the LRF was delayed, 3. the lander was unable to decelerate to the necessary speed for a lunar landing, and 4. there was a high likelihood that a hard landing on the lunar surface had occurred. • Analysis of results as of June 24, 2025: Through subsequent and further analysis of telemetry data acquired from the lander confirmed that the technical cause of the hard landing was an anomaly in the LRF hardware. The review also confirmed the issue was not related to the landing guidance control software, nor was it caused by anomalies in the propulsion system or other systems such as power supply. • Based on this conclusion, verification of the LRF anomaly was conducted, focusing on two possibilities: 1. Potential error in the installation direction during assembly, manufacturing and/or testing, or abnormal attitude of the lander during descent 2. Deterioration of LRF performance during flight or performance that was lower than expected • The review detected no errors in the installation direction during AIT or attitude abnormalities during descent. The review therefore concluded that the possibility of “deterioration in the performance of the LRF during flight or the performance itself was lower than expected” is high.This information, including implementing countermeasures and improvements, will be incorporated into planning future missions. • As a result of the review ispace has also determined that it will undertake the following initiatives: 1. Launch an external review task force including third-party experts 2. Implement further improvement of technical capabilities through expanded collaboration with the Japan Aerospace Exploration Agency (JAXA)Impact on Future MissionsBased on the technical analysis and improvement plan, the re-selection of landing sensors such as LRFs and the review and expansion of testing are estimated to increase combined development costs by a maximum of approximately 1.5 billion yen for Mission 3 (official name: Team Draper Commercial Mission 1) and Mission 4. These costs are expected to be recognized on a phased basis during the period leading up to the planned launches in 2027, so there is no expected impact on the consolidated performance forecast for the fiscal year ending March 2026 and no revisions are needed. There is no expected impact on the current launch schedule for Missions 3 and 4.
iSpace are sharing their detailed post flight analysis from flight 2
