Subject: An Account of the "Peregrine" Lunar Lander's Abort
From: Daniel Adamo <[email-masked]>
To: "ATIG (A-K)" <[email-masked]>
Date: Mon, 29 Jan 2024 19:45:03 -0800

ATIG Members-

As most Shuttle Era navigators can attest, there are few challenges greater than a space vehicle venting overboard.  Orbiters would often schedule wastewater dumps.  Mercifully, venting from these dumps were brief, controlled, well characterized, and manageable.  Then there were the fee-flying payloads with leaky tanks…

Earlier this month, an extreme navigation and mission planning challenge arose when the Peregrine lunar lander developed a mission-critical leak in its propulsion system's oxidizer tank shortly after trans-lunar injection.  The attached report examines some of the implications from this overboard vent.  Comments are welcome!

-Dan