1. Preface

   • Zdeněk Kopal
   • Jürgen Rahe

   EditorialNotes 01 March 1985 Pages: 1 - 1

2. Friedrich Wilhelm Bessel — An appreciation

   • Zdeněk Kopal

   OriginalPaper 01 March 1985 Pages: 2 - 10

3. Friedrich Wilhelm Bessel (1784–1846)

   • Walter Fricke

   OriginalPaper 01 March 1985 Pages: 11 - 19

4. Project HIPPARCOS

   • P. L. Bernacca

   Part I: Stellar Astrometry 01 March 1985 Pages: 21 - 45

5. Hipparcos astrometric binaries

   • J. Dommanget

   Part I: Stellar Astrometry 01 March 1985 Pages: 47 - 63

6. High resolution problems in astrometry and spectroscopy of binaries and their significance for the progress of stellar physics

   • Frans van't Veer

   Part I: Stellar Astrometry 01 March 1985 Pages: 65 - 74

7. Secam—A seeing-controlled camera for high-resolution photographs

   • Wolfhard Schlosser

   Part I: Stellar Astrometry 01 March 1985 Pages: 75 - 76

8. Statistical models for HIPPARCOS binaries

   • S. Söderhjelm

   Part I: Stellar Astrometry 01 March 1985 Pages: 77 - 87

9. De Media Aequinoctiorum Praecessione atque De Nutatione stellae SS433

   • Remo Ruffini
   • Song Doo Jong

   Part I: Stellar Astrometry 01 March 1985 Pages: 89 - 94

10. Relativistic astrometry

    • Michael Soffel
    • Joachim Schastok
    • Manfred Schneider

    Part I: Stellar Astrometry 01 March 1985 Pages: 95 - 101

11. Friedrich Wilhelm Bessel 1784, July 22–1846, March 17

    • P. van de Kamp

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 103 - 104

12. Current work on binary and multiple stars

    • Mario G. Fracastoro

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 105 - 110

13. Modern methods in the astrometry of double stars

    • Laurence W. Fredrick

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 111 - 115

14. On the observation of double stars for the determination of their proper motions

    • M. S. Zverev

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 117 - 118

15. On the determination of double star orbits

    • Heinrich Eichhorn

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 119 - 124

16. Distribution of astrometric binaries in various galactic latitudes

    • A. N. Goyal

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 125 - 131

17. Astrometric binaries and their role in double star astronomy

    • T. Herczeg

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 133 - 134

18. Work on astrometric binaries in China

    • L. Yan
    • L. Wan
    • S. Gong

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 135 - 136

19. Close triple star systems

    • Frank Bradshaw Wood

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 137 - 141

20. Liminosity distribution function for visual binary stars

    • Karl D. Rakos

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 143 - 148

21. The frequency of binaries with a degenerate component

    • J. L. Halbwachs

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 149 - 152

22. Trapezium-type multiple systems

    • L. V. Mirzoyan
    • G. N. Salukvadze

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 153 - 158

23. A search for CPM stars

    • J. L. Halbwachs

    Part II: Astrometric Binaries—Astrometry 01 March 1985 Pages: 159 - 159

24. The spectroscopic study of astrometric binaries

    • Goro Ishida

    Part III: Astrometric Binaries—Astrophysics 01 March 1985 Pages: 161 - 162

25. G 82-23: A new subdwarf-white dwarf binary

    • I. Bues
    • G. Rupprecht

    Part III: Astrometric Binaries—Astrophysics 01 March 1985 Pages: 163 - 168

26. Accuracy of close binary mass determinations from parallaxes

    • W. Van Hamme
    • R. E. Wilson

    Part III: Astrometric Binaries—Astrophysics 01 March 1985 Pages: 169 - 175

27. Epsilon Aurigae

    • Robert D. Chapman

    Part III: Astrometric Binaries—Astrophysics 01 March 1985 Pages: 177 - 182

28. The heliometer principle and some modern applications

    • Edward H. Geyer

    Part IV: Heliometric Astrometry 01 March 1985 Pages: 183 - 192

29. Bessel and librations of the Moon

    • Karol Kozieŀ

    Part IV: Heliometric Astrometry 01 March 1985 Pages: 193 - 196

30. The heliometer as a tool for the measure of the Moon

    • Michael Moutsoulas

    Part IV: Heliometric Astrometry 01 March 1985 Pages: 197 - 201

31. Concluding remarks

    • Zdeněk Kopal

    EditorialNotes 01 March 1985 Pages: 203 - 207

32. List of participants

    Legacy 01 March 1985 Pages: 209 - 209

33. Announcement

    Announcement 01 March 1985 Pages: 210 - 210