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- W2364306193 abstract "The rare event, a star (SAO 158637) occulted by Uranus, occured on March 10 this year. We observed this event in Peking. The equipment used is a 60 cm reflector with an interference filter centered at 7200 with halfwidth 140. Photographs 1 and 2 show the photcelectrical records of the two occultations caused by the main ring of Uranus. After correcting for ΔT = 1.2, the midtime of the first occultation is 20~h18~m42UT, duration 9.5, the computed optical thickness is τ_λ=1. The second occultation began at 21~h47~m36, the records being interupted by center-checking after 8. The scales of photo 1 and 2 are different. In order to reduce them to the same scale, all thee values of intensity in photo 2 must be multiplied by a factor of 1.6. Thus we obtain the value of optical thickness amounting to only τ_λ= 0.4. It deserves a further discussion. Using our own observational data and synthesizing the data from abroad, we obtain Tab 1. It shows that the width of main ring is not homegeneous. The computational results also show that the main ring is an elliptic one. with a small inclination to the equatorial plane of Uranus, the semi-major axis a and the eccentricity e are obtained. The radius of Uranus is assumed to be 26450 km in eomputations." @default.
- W2364306193 created "2016-06-24" @default.
- W2364306193 creator A5078795477 @default.
- W2364306193 date "1977-01-01" @default.
- W2364306193 modified "2023-09-24" @default.
- W2364306193 title "THE PHOTOELECTRICAL OBSERVATION AND ANALYSIS OF OCCULTATION OF SAO 158687 BY URANIAN RING" @default.
- W2364306193 hasPublicationYear "1977" @default.
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