Pluto-Charon stellar occultation candidates - 1990-1995

Details Pluto-Charon stellar occultation candidates - 1990-1995 Pluto-Charon stellar occultation candidates - 1990-1995

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1464d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Oct. 1991, p. 1464-1484.

Astronomy and Astrophysics

Astronomy

21

Charon, Pluto (Planet), Stellar Occultation, Charge Coupled Devices, Faint Objects, Sky Surveys (Astronomy)

Scientific paper

A search to identify stars that might be occulted by Pluto or Charon during the period 1990-1995 and part of 1996 is studied. This search was made with an unfiltered CCD camera operated in the strip scanning mode, and it reaches an R magnitude of approximately 17.5 - about 1.5 mag fainter than previous searches. Circumstances for each of the 162 potential occultations are given, including an approximate R magnitude of the star, which allows estimation of the signal-to-noise ratio (S/N) for observation of each occultation. The faintest stars in the list would yield an S/N of about 20 for a 1 s integration when observed with a CCD detector on an 8 m telescope under a dark sky. The astrometric precision (+/- 0.2 arcsec, with larger systematic errors possible for individual cases) is insufficient to serve as a final prediction for these potential occultations, but is sufficient to identify stars deserving of further, more accurate, astrometric observations. Statistically, about 32 of these events to be observable somewhere on earth are expected. The number of events actually observed will be substantially smaller because of clouds and the sparse distribution of large telescopes. Finder charts for each of the 91 stars involved are presented.

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