The 1983 June 15 occultation by Neptune. I - Limits on a possible ring system

Details The 1983 June 15 occultation by Neptune. I - Limits on a possible ring system The 1983 June 15 occultation by Neptune. I - Limits on a possible ring system

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.2615e&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Dec. 1985, p. 2615-2623. Research supported by the National Geographic Society.

Astronomy and Astrophysics

Astronomy

15

Neptune (Planet), Planetary Rings, Stellar Occultation, Atmospheric Temperature, Light Curve, Neptune Atmosphere, Radii, Neptune, Occultations, Rings, Astronomy, Earth-Based Observations, Depth, Telescope Methods, Optical Properties, Equatorial Regions, Roche Limit, Analysis, Lightcurves, Comparisons, Kuiper Airborne Observatory, Kao

Scientific paper

Observations on 15 June 1983 of an occultation of a star by Neptune from Mauna Kea, Mount Stromlo, Siding Spring, and the Kuiper Airborne Observatory show no evidence for equatorial rings between 25300 and 200000 km (RN = 25269 km, from Paper II). Within most of this region, the upper limit on the optical depth along the line of sight, for rings broader than 6 km, is 0.04, which corresponds to a normal optical depth of 0.016. These results rule out a Neptunian ring system similar to that of Saturn or Uranus, but not a system of low optical depth similar to the Jovian rings. The data show no features that appear likely to have been caused by material in the equatorial plane of Neptune near the Roche limit.

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