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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

Landing SiteWeak Stability Boundary Transfer (WSB)

January 29, 2009

[Kara Akgulian] [Mission Ops]

[Locomotion]

1

lunar landing site
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
wsb analysis
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

slide5

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]

references
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