Neptune's rings, 1983-1989: Ground-based stellar occultation observations. I - Ring-like arc detections

Details Neptune's rings, 1983-1989: Ground-based stellar occultation observations. I - Ring-like arc detections Neptune's rings, 1983-1989: Ground-based stellar occultation observations. I - Ring-like arc detections

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...89..220s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 89, Feb. 1991, p. 220-243.

Astronomy and Astrophysics

Astronomy

20

Neptune (Planet), Planetary Rings, Space Observations (From Earth), Stellar Occultation, Astrometry, Astronomical Models, Light Curve, Telescopes, Voyager 2 Spacecraft, Neptune, Rings, Earth-Based Observations, Occultations, Ring Arcs, Lightcurves, Procedure, Equipment, Astronomy, Data Reduction, Width, Physical Properties, Geometry, Spacecraft Observations, Voyager 2 Mission, Comparisons, Depth, Distance, Radius, Description

Scientific paper

The ground-based stellar occultation observations presently analyzed furnish evidence for either incomplete or highly inhomogeneous ring-like material around Neptune, as well as an upper limit for the density of continuous rings of the planet. The analysis shows that the June 22, 1984 and August 20, 1985 observations of material around Neptune are probably due to highly inhomogeneous ring-like material, or arcs, orbiting the planet. The extant data are also studied for narrow (10-50 km) continuous rings; no evidence is found for them between 1.1 and 3.5 Neptunian radii; neither are there diffuse rings near the 53,200 and 63,000 km radii where Voyager 2 observed two continuous rings.

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