Math 2.0

Mechanics of particles and systems Particle systems and celestial mechanics Concept

Jacobi integral

Builds on Circular restricted three-body problemFirst integral

Summary

The Jacobi integral is the conserved quantity of the circular restricted three-body problem. It is minus twice the energy per unit mass of the small body, measured in the frame that rotates with the two large bodies. It is a first integral, and by a result of Poincaré the problem has no other independent analytic one. It divides space into regions that the small body can reach and regions it can never enter. It was found by Carl Gustav Jacob Jacobi in 1836.

Reading path

To understand this page from the ground up, read these 74 pages in order. The foundations come first.

  1. Chaos theory concept
  2. Conic section concept
  3. Cross product concept
  4. Derivative concept
  5. Differential equation concept
  6. Ellipse concept
  7. Euclidean space object
  8. Euclidean vector concept
  9. First integral concept
  10. Focus of a conic concept
  11. Function concept
  12. Hamiltonian system concept
  13. Identity matrix object
  14. Interval concept
  15. Matrix definition
  16. Ordinary differential equation concept
  17. Vector space definition
  18. Velocity concept
  19. Kepler problem example
  20. Fréchet derivative definition
  21. Cross product definition
  22. Ordinary differential equation definition
  23. Function of several variables concept
  24. Vector-valued function concept
  25. Lipschitz condition definition
  26. Classical mechanics concept
  27. n-body problem problem
  28. Square matrix definition
  29. Transpose definition
  30. Linear map definition
  31. Momentum concept
  32. Double integral concept
  33. Partial derivative concept
  34. Limit of a function of several variables concept
  35. Inertial frame of reference concept
  36. Solution of an ordinary differential equation definition
  37. Orthogonal matrix definition
  38. Three-body problem problem
  39. Multilinear map definition
  40. Triple integral concept
  41. Newton's laws of motion statement
  42. Continuity in R^n definition
  43. Differentiable function of several variables definition
  44. Initial value problem definition
  45. Partial derivative definition
  46. Orthogonal group object
  47. Alternating multilinear map definition
  48. Centre of mass concept
  49. Differentiable on an open set definition
  50. Gradient definition
  51. Higher partial derivatives definition
  52. Picard–Lindelöf hypotheses definition
  53. Determinant definition
  54. Reduced mass concept
  55. Iterated derivative definition
  56. Picard operator definition
  57. Special orthogonal group object
  58. Angular velocity concept
  59. C^k function characterised by continuous derivatives statement
  60. Integral equation form of an initial value problem statement
  61. An iterate of the Picard operator is a contraction statement
  62. Rotating reference frame concept
  63. Vector field definition
  64. Picard–Lindelöf theorem statement
  65. Conservative vector field definition
  66. Classical mechanics definition
  67. Momentum definition
  68. Potential energy definition
  69. Angular momentum definition
  70. Central force definition
  71. Newton's law of universal gravitation statement
  72. Two-body problem problem
  73. Circular restricted three-body problem problem
  74. Jacobi integral concept

Where this leads

1 page builds on this one.

Further reading

  1. Web https://en.wikipedia.org/wiki/Jacobi_integral
About this page
TagKBR6WZQN6F
URIm2://KBR6WZQN6F
Kindconcept
WritingW0 stub
MSC70F07, 70H33, 70F15
UsesCircular restricted three-body problem, First integral
Same as
Changed3 November 2026

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