Sun and Planetary System : Proceedings of the Sixth European Regional Meeting in Astronomy, Held in Dubrovnik, Yugoslavia, 19–23 October 1981

The scientific programme was divided into the following five sections: (1) Sun from the astronomical and physical points of view (main organizer: J.-C. Pecker); (2) Astronomical, geophysical and geodetic problems related to the Earth (main organizer: J. Kovalevsky); (3) Physics of planets, minor planets, satellites and interplanetary medium (main organizer: Z. Kopal); (4) Motions in the planetary system (main organizer: L. Kresak); (5) Threedimensional refraction (main organizer: G. Teleki). Ten invited review papers were presented in 5 plenary sessions; 20 invited papers and about 100 contributed papers were presented in parallel sessions. The editors are indebted to the main organizers of the various sections for their great efforts in establishing a presentation of present-day research. They also wish to express warmest thanks to the authors of papers and to referees who have made a timely completion of the proceedings possible. January 1982 xiii W. Fricke and G. Teleki (eds. Front Matter....Pages i-xiii Address by....Pages 1-2 Opening Address by....Pages 3-5 Address by....Pages 7-8 New Impetus to the Exploration of the Solar System (Inaugural Address)....Pages 9-11 The Solar System — Known Facts and Unsolved Problems....Pages 13-21 Front Matter....Pages 23-23 The Star “Sun”....Pages 25-34 Resultats D’Observations du Soleil a L’Astrolabe du Cerga....Pages 35-38 The Effect of Personal Equation on Measurements of the Solar Semi-Diameter by Transit Circle Observers....Pages 39-43 A Direct UBV Color Measurement of the Sun....Pages 45-46 Nuclear Astrophysics of the Sun....Pages 47-52 The Solar Neutrino Puzzle....Pages 53-58 Solar Models and Neutrino Problem....Pages 59-62 The Rotation-Magnetism-Convection Coupling in the Sun....Pages 63-70 Relationship between Photospheric and Chromospheric Ω(v,t) Deduced by Temporarily and Spatially Correlated Tracers....Pages 71-72 Line-of-Sight Velocity Field of Synodic Solar Rotation....Pages 73-76 Solar Rotation and Meridional Motions Derived from Sunspot Groups....Pages 77-78 Subphotospheric Velocity Fields Inferred by Sunspots Motions....Pages 79-80 Granulation, Supergranulation and Atmospheric Waves....Pages 81-87 A Noisy Sun ?....Pages 89-92 Spectral Analysis of Wave Motions in the Region of Temperature Minimum of the Sun’s Atmosphere....Pages 93-96 Front Matter....Pages 23-23 On the Detection of the Periodic Oscillations of the Inclination of the Frequency Spectrum of S-Component of Solar Radio Emission....Pages 97-98 Some Photospheric Characteristics of the Sun as a Star....Pages 99-100 Stark Broadening of Heavy Ion Solar Lines....Pages 101-102 The Analysis and Observation of the Neutral Spectrum of Potassium in the Solar Atmosphere....Pages 103-104 Mesoturbulence in the Solar Atmosphere....Pages 105-106 Voigt Profile for the CO Emission Lines in the Solar Sunspot Spectrum....Pages 107-108 Solar Radio Granulation at Microwaves and Its Optical Identification....Pages 109-112 A Theoretical Model of the Solar Chromosphere over a Suns Pot....Pages 113-114 Space-Born and Ground-Based Observations of a Solar Active Region and a Flare....Pages 115-118 The Beginning of Observations of Large-Scale Solar Magnetic Fields at the Sayan Observatory: Instrument, Plans, Preliminary Results....Pages 119-122 The Solar Complex of SibIZMIR: Observatories, Instruments and the Main Results of the Investigations....Pages 123-124 Motions in Sunspots Like Torsional Oscillations....Pages 125-126 Sunspots Proper Motions and Positions of H-Alpha Filaments in the Active Region of August 1979....Pages 127-128 On the Umbral Dots....Pages 129-130 Turbulent Velocity Fields in Quiescent Prominences....Pages 131-132 Determination of the Electron Density in a Quiescent Prominencè....Pages 133-134 A Polarization Investigation of Prominences....Pages 135-136 The Formation of Solar Prominences....Pages 137-138 Radiation from Surface Wave Packet and Type II Solar Radiation Emission....Pages 139-140 Magnetohydrodynamics and Thermodynamics of Coronal Loops....Pages 141-142 Front Matter....Pages 23-23 Temperature and Steady Flows in Slender Magnetic Tubes....Pages 143-144 Gravito-Magnetic Explanation of the Temperature of Stellar Coronae and of Planetary van Allen Belts....Pages 145-146 Front Matter....Pages 147-147 Astronomical and Geophysical Problems of the Earth’s Rotation....Pages 149-162 A Note on the Initial Results and Future Plans of Project Merit....Pages 163-164 Steps Towards the Determination of Earth Rotation Parameters Not Dependent on the Observation Technique....Pages 165-172 Secular and Decade Fluctuations in the Earth’s Rotation: 700 BC — AD 1978....Pages 173-178 Oceanic Tides and the Rotation of the Earth....Pages 179-184 Effects of the Non-Rigidity of the Earth Derived from Astronomical Observations....Pages 185-188 Correlation between Solar Activity and Universal Time Variations....Pages 189-190 On Investigations of Mean Latitude Variations....Pages 191-194 Closing Errors of the Belgrade Latitude Observations and Temperature Influences....Pages 195-196 Reference Systems Linkage from Space....Pages 197-198 High Precision Tracking of Geosynchronous Satellites: Oceanographic Applications....Pages 199-200 Optical Tracking of Synchronous Satellites for Geophysical Purposes....Pages 201-202 Gravimetric Geoid Determination for the Area of Greece....Pages 203-204 Coincidence of Some Magnetic and Gravity Field Characteristics....Pages 205-208 Precession and Nutation Influence on the Harmonic Coefficients of a Planetary Potential....Pages 209-212 Aerosol Stratification of the Stratosphere and Mesosphere....Pages 213-214 Interplanetary Magnetic Field and Solar Cycle Modulation of the Tropospheric Circulation over West Mediterranean....Pages 215-216 On the Evolution of Nearly Circular Orbits of Satellites with Critical Inclination....Pages 217-218 Front Matter....Pages 219-219 Excitation in the Early Solar Nebula — New Experimental Findings....Pages 221-232 Physical Processes of Relevance to the Formation of the Planetary System....Pages 233-242 Magnetospheres of Jupiter and Saturn....Pages 243-248 A Physical Detail Relevant to the Savić-Kašanin Theory of Behaviour of Materials under High Pressure....Pages 249-250 On the Lifetime of E-Ring Grains and Their Nature....Pages 251-252 H 2 Enrichment of Interplanetary Medium....Pages 253-254 Study of the Interplanetary Dust at High Ecliptic Latitudes: Doppler-Fizeau Shifts....Pages 255-256 Near Infrared Emission from the Solar Corona....Pages 257-258 Associative Ionization and Sodium in the Atmospheres of Planetary System Bodies....Pages 259-260 On Physical Interpetation of Hypsometric Characteristics of the Moon and Planets....Pages 261-262 The Lunar Photometric Constant in the System of True Full Moon....Pages 263-264 Surface Properties of Asteroids....Pages 265-268 Earth-Crossing Asteroids: New Discoveries....Pages 269-276 Synthetic Lightcurves of Asteroidal Binary Systems....Pages 277-278 CCD Scanning for Asteroids and Comets....Pages 279-284 Color Variations of Asteroids during Rotation....Pages 285-286 Results from Occultations by Minor Planets....Pages 287-288 On the Rotations of M Asteroids....Pages 289-290 Asteroid Rotation Rates: Comparison between Theory and Observations....Pages 291-294 Asteroid Collisional Evolution: Outcomes of Catastrophic Impacts....Pages 295-298 Front Matter....Pages 219-219 An Improved Representation of the Average Opposition Magnitudes of Asteroids....Pages 299-302 A Coordinate Program for Pole Determination of Asteroids....Pages 303-304 The Worldwide Photoelectric Campaign for the Asteroid 51 Nemausa....Pages 305-306 Halley’s Comet and Plans for Its Observation during Its Return in 1986....Pages 307-320 Perihelion Asymmetry in the Photometric Parameters of Long-Period Comets at Large Heliocentric Distances....Pages 321-322 Ultraviolet Spectroscopy of Comets....Pages 323-330 Plasma — Dust Interactions in the Solar and Cometary Environment....Pages 331-333 The Total Mass and Structure of the Meteor Stream Associated with Comet Halley....Pages 335-336 Outbursts of Comets....Pages 337-338 On the Electric Charge of Interplanetary Grains....Pages 339-341 Observations of Zodiacal Light at Abu-Simbel, Egypt, during the Period 1975–1979....Pages 343-344 The Brightness Integral Equation. A Different Approach to the Study of the Zodiacal Light....Pages 345-347 Sarajevo Observatory Fireball Patrol....Pages 349-350 Front Matter....Pages 351-351 Review of the Dynamics of Satellites and Planetary Rings....Pages 353-359 Dynamical Evolution and Disintegration of Comets....Pages 361-370 A Dynamical Study of Possible Birthplaces of Comets....Pages 371-374 An Interstellar Origin for Comets....Pages 375-378 Strong Perturbations at Close Encounters with Jupiter....Pages 379-384 Statistics of Close Encounters of Minor Bodies with the Outer Planets....Pages 385-388 Keplerian Estimates of Pre-Discovery Encounters with Jupiter for Short-Period Comets....Pages 389-390 Front Matter....Pages 351-351 The Motions of Comets near the 2/1 Resonance with Jupiter....Pages 391-394 Temporary Satellite Captures by Jupiter for Orbits Resembling the One of Comet P/Gehrels 3....Pages 395-396 On the Long-Term Orbital Evolution of Comet P/Boethin....Pages 397-400 On the Displacement of Meteor Showers Activity....Pages 401-402 Some Characteristics of the Asteroid Belt Structure....Pages 403-404 Resonances in the Motions of Minor Planets and Their Use for the Determination of Masses....Pages 405-410 Stability of Real Hecuba and Hilda Asteroids....Pages 411-412 First-Order Theory of Ceres, Pallas, Juno, and Vesta....Pages 413-414 Methods of Computation of the Perturbed Motion of Small Bodies in the Solar System....Pages 415-419 A New Method for Expression of the Perturbation Function....Pages 421-422 Relativistic Dynamics of the Earth-Moon System....Pages 423-427 On the Secular Effects in the Motion of a Planetary Satellite....Pages 429-430 L’Invariabilité Séculaire Des Grands Demiaxes Des Orbites Planétaires....Pages 431-433 On Linear Stability of Triangular Libration Points of the Photogravitational Restricted Three-Body Problem Wien the More Massive Primary is an Oblate Spheroid....Pages 435-436 Nouvelles Theories des Planetes et de la Lune Dans Les Ephemerides Francaises....Pages 437-440 New Planetary Ephemerides Back to 4000 B.C.....Pages 441-442 Ephemerides et Observations de Mars a L’Astrolabe....Pages 443-444 Observations of the Sun and Inner Planets with the Large Meridian Circlein Belgrade....Pages 445-446 Some Results of the Mercury Transit Observations in 1970 and 1973 at Belgrade....Pages 447-448 Contribution of the Pulkovo Observatory to the Improvement of Orientation of the FK4 System Using Observations of Selected Minor Planets....Pages 449-451 Front Matter....Pages 453-453 Problems of Three-Dimensional Refraction in Astrometry....Pages 455-462 The Use of Lidar to Obtain Three-Dimensional Refraction Data....Pages 463-470 Final Refraction Problems in Time and Latitude Observations Through Classical Techniques....Pages 471-474 Astronomical Refraction Calculated from Aerological Data in Japan....Pages 475-476 Experimental Model for Diurnal Astronomical Refraction....Pages 477-482 Astrometric Site Selection....Pages 483-491 The Influence of Ionospheric Refraction on Radio Astronomy Interferometry....Pages 493-496 Disregard of Some Ray Tracing Principles in Optical and Radio Spectral Bands....Pages 497-498 Refraction Effects on Geodetic Measurements in Three-Dimensional Terrestrial Nets....Pages 499-502 Experimental Investigation of Refraction above Water Crossings....Pages 503-504 Atmospheric Turbulence and Its Effects on Direction Measurements....Pages 505-510 Local Geodynamics with Two-Colour Instruments....Pages 511-518 Terrestrial Refraction and Vertical Temperature Gradient....Pages 519-522 Terrestrial Refraction and Vertical Temperature Gradient in the Area of Thessaloniki....Pages 523-528 A Study of the Refractivity N of the Air in the Area of Athens....Pages 529-530 Back Matter....Pages 531-538 The Sixth European Regional Meeting in Astronomy (VI ERMA) on "Sun and Planetary System" was held in Dubrovnik (Yugoslavia), 19-23 October 1981, sponsored by the Federal Executive Council of Yugoslavia, the IAU, IUGG, and the European Physical Society. The Scientific Organizing Committee included W. Fricke (Chairman), H. Alfven, H. Haupt, H. Kautzleben, Z. Kopal, J. Kovalevsky, V.A. Krat, L. Kresak, G. Marx, P. Melchior, P.J. Message, J.-C. Pecker, G. Sitarski, B. Sevarlic, G. Teleki, and R.M. West. The Local Organizing Committee representing the Union of Societies of Mathematicians, Physicists and Astronomers, Yugoslavia, included G. Teleki (Chairman), I. Pakvor (Vice-Chairman), Z. Knezevic (Secretary), B. Jovanovic, L. Randic, P. Ranzinger, V. Ruzdjak, B. Popovic, and B. Sevarlic. The Meeting was attended by 216 participants from 27 countries (5 continents). The scientific programme was divided into the following five sections: (1) Sun from the astronomical and physical points of view (main organizer: J.-C. Pecker); (2) Astronomical, geophysical and geodetic problems related to the Earth (main organizer: J. Kovalevsky); (3) Physics of planets, minor planets, satellites and interplanetary medium (main organizer: Z. Kopal); (4) Motions in the planetary system (main organizer: L. Kresak); (5) Three dimensional refraction (main organizer: G. Teleki). Ten invited review papers were presented in 5 plenary sessions; 20 invited papers and about 100 contributed papers were presented in parallel sessions