NASA Safety Panel Puts Starship's Moon Mission Launch Count at 22

A recent estimate presented to a NASA advisory panel indicates that a mission to the Moon using SpaceX's Starship vehicle would require 22 launches. The figure, shared during the Aerospace Safety Advisory Panel's quarterly meeting on October 22, is significantly higher than previous projections and underscores the logistical hurdles facing NASA's Artemis program, which aims to return humans to the lunar surface.

The high number of launches stems from the mission's architecture, which requires a dedicated 'depot' Starship to be positioned in low-Earth orbit. This depot must then be filled with propellant by multiple 'tanker' Starships. The total count of 22 includes the depot and tanker flights needed to fuel it, along with the crewed lander vehicle itself. This process is essential to gather enough liquid oxygen and methane to enable a voyage to the Moon, a landing, and a subsequent return to lunar orbit.

The projection represents a substantial increase from figures previously discussed within NASA. In 2023, Lisa Watson-Morgan, then-director of NASA's Human Landing System program, said the required launch count was in the 'high single digits to the low double digits.' Other officials have cited figures in the 'high teens.' The expectation has consistently been that improvements in Starship's lift capacity would reduce the number of tanker flights needed to fuel a single mission.

This latest estimate surfaces amid concerns among some NASA officials that such improvements may not be materializing quickly enough. The rising launch count could impact the feasibility of using Starship for a crewed lunar landing this decade as part of the Artemis program.

The number of launches required to support a Moon landing has been a sensitive and closely guarded metric by NASA for years. Officials have often declined to provide a specific figure, citing the evolving nature of the mission plan. The current figure of 22 is a projection from a panel member and does not represent an official NASA estimate for any specific mission.

Looking forward, the viability of the planned lunar landing mission hinges on SpaceX's ability to reduce the required number of launches through technical improvements. Until such advancements are made, the high flight rate remains a critical factor in mission planning and risk assessment for NASA's efforts to return to the Moon.