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Landing Site Weak Stability Boundary Transfer (WSB)

Landing Site Weak Stability Boundary Transfer (WSB). January 29, 2009. 1. Lunar Landing Site. Mare Cognitum 3°S 22°W ; ~5km between Surveyor 2, Apollo 12 and Apollo 17 Mare Fecunditatis 1°S 55°E ; ~5km to Luna 16 Mare Insularum 2°N 26°W ; ~5km to Apollo 16 Mare Tranquilitatis

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Landing Site Weak Stability Boundary Transfer (WSB)

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  1. Landing SiteWeak Stability Boundary Transfer (WSB) January 29, 2009 [Kara Akgulian] [Mission Ops] [Locomotion] 1

  2. Lunar Landing Site [Kara Akgulian] [Mission Ops] [Locomotion] • Mare Cognitum • 3°S 22°W; ~5km between Surveyor 2, Apollo 12 and Apollo 17 • Mare Fecunditatis • 1°S 55°E; ~5km to Luna 16 • Mare Insularum • 2°N 26°W; ~5km to Apollo 16 • Mare Tranquilitatis • 2°N 25°E; ~5-10km between Ranger 8, Surveyor 5, Apollo 11

  3. WSB Analysis Apogee Figure based on E.A. Belbruno Ref 1 [Kara Akgulian] [Mission Ops] [Locomotion] • Background • Uses the lunar and solar gravity to reduce total ∆V • Theoretically • 25% ∆V savings when compared to a Hohmann Transfer • Transfer time 80-100 days • Concerns • Not many missions • Not a lot of physics background, mostly theoretical 3

  4. [Kara Akgulian] [Mission Ops] [Locomotion] 4

  5. 10oN 10oN 0o 0o 20oE 30oE 20oW 30oW 10oN 0o 0o 10oS http://science.nasa.gov 50oE 60oE 10oW 0o [Kara Akgulian] [Mission Ops] [Locomotion]

  6. References [Kara Akgulian] [Mission Ops] [Locomotion] E.A. Belbruno, J. Carrico, “Calculation of Weak Stability Boundary Ballistic Lunar Transfer Trajectories” AIAA/AAS Astrodynamics Specialist Conference, Denver, Colorado, AIAA Paper NO.2000-4142, (August 2000) C. Circi, P. Teofilatto, “On the Dynamics of Weak Stability Boundary Lunar Transfers” pp 41-72 Topography by http://planetarynames.wr.usgs.gov by NASA and Astrogeology Research Program List of Mare by http://lunar.arc.nasa.gov/science/atlas/mare/mare.htm by NASA

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