Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983cha%26a...7..169z&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 7, Issue 3, p. 169-169.
Astronomy and Astrophysics
Astrophysics
Scientific paper
According to a supplementary forecast received from Dr. David W. Dunham, a photoelectric observation of a stellar occultation by Asteroid (444) Gyptis was made at our observatory on 1982 June 24. The star occulted was SAO 138868A (visual magnitude 8.9 mag, spectral class K2).
The instrument used was the 60-cm reflecting telescope of our observatory, equipped with a single-channel photoelectric photometer and the photomultipler was EMI 19502B. A two-pen automatic recorder made it possible to record the star and time signals simultaneously. The accuracy of the time signals is estimted at 0.1 s. The observation was made in yellow light. The observed times are:
Time of immersion: 12h 36m 58.8s U.T.
Time of emersion: 12h 37m 11.2s U.T.
Duration of occultation: 12.4s
These are close to the predicted values. During the observing period lasting some 25 minutes, there were no secondary occultations detected. In the occultation by the planet itself, both the immersion and the emersion were observed visually and the weather was fine at the time.
Wu Zhi-Xian
Yang Xiu-Yi
Zhou Xing-Hai
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