Stationkeeping of quasiperiodic orbits near a periodic halo orbit of the Earth+Moon-Sun system is analyzed. The full solar system is considered as a perturbation of the restricted three body problem. In the full solar system the periodic orbits are lost but the system still has quasi periodic solutions relatively close to the previous halo orbits

IAUC 4283 available at Central Bureau for Astronomical Telegrams.

The authors present low resolution maps, of a four by one half arcminute region, of comet Halley, in photometric bands J and K, and central scan in the H band, taken with the 1.5 m Sanchez-Magro Infrared Flux Collector of the Instituto de Astrofísica de Canarias, situated in its Observatorio del Teide. They obtain central and integral magnitudes

Maps of a 3 by 2 arcmin region of the inner coma of comet Halley, at 10 arcsec resolution, in several principal atomic and molecular species were prepared by multiposition absolute spectrophotometry at 3.6 A resolution, in the wavelength range 3700 to 7598 A. The data form a subset of a larger data set collected at a range of heliocentric distances

Daily observations of solar global oscillations using a resonant scattering spectrometer have been obtained by observing integral sunlight during the summer seasons of the years 1977 to 1984. The power spectra of the daily residuals are calculated and the mean for each observing season is found. Several discrete frequency intervals are defined in

Not Available