The Motion, Evolution of Orbits, and Origin of Comets

1. Evolution of Cometary Orbits on a Cosmogonie Time Scale.- I/Observations and Ephemerides.- 2. Cometary Observations and Variations in Cometary Brightness.- 3. Cometary Brightness Variations and Conditions in Interplanetary Space.- 4. Observations of Comets at the Crimean Astrophysical Observatory.- 5. L'observation des comètes à l'astrographe de l'Observatoire de Nice.- 6. Physical Observations of the Short-Period Comet 1969 IV.- 7. On Establishing an International Service for Cometary Observations and Ephemerides.- 8. General Remarks on Orbit and Ephemeris Computation.- II/General Methods of Orbit Theory.- A. Analytical Methods.- 9. A Series-Solution Method for Cometary Orbits.- 10. On the Application of Hansen's Method of Partial Anomalies to the Calculation of Perturbations in Cometary Motions.- 11. Orbital Characteristics of Comets Passing Through the 1:1 Commensurability with Jupiter.- 12. The Motions of Bodies Close to Commensurabilities with Jupiter (Abstract).- 13. On the Motion of Short-Period Comets in the Neighbourhood of Jupiter.- 14. Secular Perturbations on Periodic Comets.- B. Numerical Methods.- 15. A Numerical Method of Integration by Means of Taylor-Steffensen Series and Its Possible Use in the Study of the Motions of Comets and Minor Planets.- 16. A Library of Standard Programmes for Constructing Numerical Theories for Studying the Motion and Evolution of the Orbits of the Minor Bodies of the Solar System.- 17. The Solution of Problems of Cometary Astronomy on Electronic Computers.- 18. A Method of Integrating the Equations of Motion in Special Coordinates and the Elimination of a Discontinuity in the Theory of the Motion of Periodic Comet Wolf.- 19. The Use of the Electronic Computer for the Urgent Publication of Astronomical Material.- C. Determination of Orbits.- 20. A Numerical Interpretation of the Homogenization of Observational Material for One-Apparition Comets.- 21. The Problem of Elaboration and Classification of Observational Material for One-Apparition Comets.- 22. The Influence of Properties of a Set of Observations on the Weights of Determination of the Orbital Elements of a One-Apparition Comet.- 23. On the Differential Correction of Nearly Parabolic Orbits.- 24. Standardization of the Calculation of Nearly Parabolic Cometary Orbits.- 25. Détermination d'orbites paraboliques à partir de N observations au moyen de l'ordinateur électronique.- III/Motions of the Short-Period Comets.- A. Planetary Perturbations and Nongravitational Effects.- 26. Nongravitational Effects on Comets: the Current Status.- 27. On the Determination of Nongravitational Forces Acting on Comets.- 28. A Search for Encke's Comet in Ancient Chinese Records: A Progress Report.- 29. The Motion of Halley's Comet from 837 to 1910 (Abstract).- 30. A Numerical Analysis of the Motion of Periodic Comet Brooks 2.- 31. Linkage of Seven Apparitions of Periodic Comet Faye 1925-1970 and Investigation of the Orbital Evolution During 1660-2060.- 32. Investigation of the Motion of Periodic Comet Giacobini-Zinner and the Origin of the Draconid Meteor Showers of 1926, 1933 and 1946.- 33. Nongravitational Forces and Periodic Comet Giacobini-Zinner.- 34. A Non-Newtonian Orbit for Periodic Comet Borrelly.- 35. An Investigation of the Motion of Periodic Comet Borrelly from 1904 to 1967.- 36. The Motion of Periodic Comet Pons-Brooks, 1812-1954.- 37. Periodic Comet Tempel-Tuttle and the Leonid Meteor Shower.- 38. Investigation of the Motion of Periodic Comet Stephan-Oterma.- B. Determination of Planetary Masses.- 39. Determination of Planetary Masses from the Motions of Comets.- 40. The Determination of Jupiter's Mass from Large Perturbations on Cometary Orbits in Jupiter's Sphere of Action.- 41. Determination of the Mass of Jupiter from Observations of 10 Hygiea During 1932-1969.- 42. The Motion of Hidalgo and the Mass of Saturn.- 43. On the Determination of Planetary Masses.- 44. The Influence of Minor Planets on the Motions of Comets.- IV/Physical Processes in Comets.- 45. Physical Processes in Cometary Atmospheres.- 46. Some Remarks on the Liberation of Gases from Cometary Nuclei.- 47. The Chemical Composition of Cometary Nuclei.- 48. The Evolution of Cometary Nuclei.- 49. On the Sizes of Cometary Nuclei.- 50. Splitting and Sudden Outbursts of Comets as Indicators of Nongravitational Effects.- 51. On Nongravitational Effects in Two Classes of Models for Cometary Nuclei.- 52. Rotation Effects in the Nongravitational Parameters of Comets.- 53. A Model for the Nucleus of Encke's Comet.- 54. Laboratory Simulation of Icy Cometary Nuclei.- 55. A Nongravita-tional Effect in the Simulation of Cometary Phenomena.- V/Origin and Evolution Of Comets.- A. Orbital Stability and Evolution.- 56. Ejection of Bodies from the Solar System in the Course of the Accumulation of the Giant Planets and the Formation of the Cometary Cloud.- 57. On the Stability of the Oort Cloud.- 58. Determination of the Form of the Oort Cometary Cloud as the Hill Surface in the Galactic Field.- 59. On 'New' Comets and the Size of the Cometary Cloud (Abstract).- 60. Diffusion of Comets from Parabolic into Nearly Parabolic Orbits.- 61. New Estimates of Cometary Disintegration Times and the Implications for Diffusion Theory.- 62. Comets and Problems of Numerical Celestial Mechanics.- 63. The Effect of the Ellipticity of Jupiter's Orbit on the Capture of Comets to Short-Period Orbits.- 64. Evolution of Short-Period Cometary Orbits Due to Close pproaches to Jupiter.- 65. A New Orbital Classification for Periodic Comets.- 66. The Major Planets as Powerful Transformers of Cometary Orbits.- B. Theories of Cometary Origin.- 67. The Origin of Comets.- 68. On the Origin of Comets and Their Importance for the Cosmogony of the Solar System.- 69. The Origin and Evolution of the Comets and Other Small Bodies in the Solar System.- 70. On the Problem of the Origin of Comets.- VI/Relationship with Meteors and Minor Planets.- A. Orbital Evolution of Meteors and Minor Planets.- 71. Investigation of the Orbital Stability of Minor Planets with Cometary Eccentricities.- 72. Evolution of the Orbits of Selected Minor Planets during an Interval of 1000 Years.- 73. Secular Perturbations on the Minor Bodies of the Solar System.- 74. The Use of the Halphen-Goryachev Method in the Study of the Evolution of the Orbits of the Quadrantid and ? Aquarid Meteor Streams.- 75. On the Rate of Ejection of Dust by Long-Period Comets.- 76. Évolution séculaire des orbites de particules météoriques.- 77. Deformation of a Meteor Stream Caused by an Approach to Jupiter.- 78. Orbital Evolution of the ? Virginid and ? Capricornid Meteor Streams.- 79. Theoretical Cometary Radiants and the Structure of Meteor Streams.- B. Possibility of Common Origin.- 80. On the Relation between Comets and Meteoroids.- 81. Formation of Comets in Meteor Streams.- 82. Statistics of the Orbits of Meteor Streams and Comets.- 83. On the Production of Meteor Streams by Cometary Nuclei.- 84. On the Dividing Line between Cometary and Asteroidal Orbits.- 85. On the Possible Common Origin of Minor Planets, Comets, and Meteors.- Concluding Discussion.