The 7 and 25 June 1985 Neptune occultations - Constraints on the putative Neptune 'arc'

Details The 7 and 25 June 1985 Neptune occultations - Constraints on the putative Neptune 'arc' The 7 and 25 June 1985 Neptune occultations - Constraints on the putative Neptune 'arc'

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...67..126c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 67, July 1986, p. 126-133.

Astronomy and Astrophysics

Astronomy

16

Binary Stars, Light Curve, Neptune (Planet), Planetary Rings, Stellar Occultation, Astrometry, Infrared Photometry

Scientific paper

Data were obtained on stellar occultations by Neptune on June 7 and 25, 1985 in an attempt to validate previous data which supported the presence of a ring-like 'arc' near the planet. The data were taken with an IR photometer at the South African Astronomical Observatory using continuous measurements at 2.2 microns. One dip was observed in the light curve of an occulted binary star. The dip was similar to a previously observed dip and, because no dip was seen for the companion star, indicated a discontinuous structure. Two estimates, around 62,600 and 63,760 km, are made for the equatorial radius of the potential arc structure, which may be discontinuous on a scale of a few thousand kilometers.

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