Observations of Uranus occultation events

William B. Hubbard, G. V. Coyne, T. Gehrels, B. A. Smith, B. H. Zellner

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A PRELIMINARY analysis of photometric data obtained by Zellner at the Perth Observatory during the Uranus appulse to SA0 158687 on 10 March 1977 shows at least three brief occultation events which appear to coincide with portions of a Uranian ring system reported by Elliot et al.1. No occultation by Uranus itself occurred at Perth. Our group also obtained an observation by Smith with a portable telescope from the vicinity of Mauritius. The data are marginal due to variable transparency but it seems clear that there was no occultation by Uranus which diminished the stellar intensity by more than 50%. No ring events were observed from Mauritius due to the onset of a rain shower. Our observations at Perth, along with the null result from Mauritius, can be combined with other available data2-5 to improve the deduction of the geometry of the ring features, and to obtain a preliminary upper limit to the radius of Uranus.

Original languageEnglish (US)
Pages (from-to)33-34
Number of pages2
JournalNature
Volume268
Issue number5615
DOIs
StatePublished - 1977

Fingerprint

Mauritius
Uranus (planet)
occultation
rings
deduction
rain
showers
observatories
telescopes
radii
geometry

ASJC Scopus subject areas

  • General

Cite this

Hubbard, W. B., Coyne, G. V., Gehrels, T., Smith, B. A., & Zellner, B. H. (1977). Observations of Uranus occultation events. Nature, 268(5615), 33-34. https://doi.org/10.1038/268033a0

Observations of Uranus occultation events. / Hubbard, William B.; Coyne, G. V.; Gehrels, T.; Smith, B. A.; Zellner, B. H.

In: Nature, Vol. 268, No. 5615, 1977, p. 33-34.

Research output: Contribution to journalArticle

Hubbard, WB, Coyne, GV, Gehrels, T, Smith, BA & Zellner, BH 1977, 'Observations of Uranus occultation events', Nature, vol. 268, no. 5615, pp. 33-34. https://doi.org/10.1038/268033a0
Hubbard WB, Coyne GV, Gehrels T, Smith BA, Zellner BH. Observations of Uranus occultation events. Nature. 1977;268(5615):33-34. https://doi.org/10.1038/268033a0
Hubbard, William B. ; Coyne, G. V. ; Gehrels, T. ; Smith, B. A. ; Zellner, B. H. / Observations of Uranus occultation events. In: Nature. 1977 ; Vol. 268, No. 5615. pp. 33-34.
@article{86b02d5d233a4e61a58bd7af76e31396,
title = "Observations of Uranus occultation events",
abstract = "A PRELIMINARY analysis of photometric data obtained by Zellner at the Perth Observatory during the Uranus appulse to SA0 158687 on 10 March 1977 shows at least three brief occultation events which appear to coincide with portions of a Uranian ring system reported by Elliot et al.1. No occultation by Uranus itself occurred at Perth. Our group also obtained an observation by Smith with a portable telescope from the vicinity of Mauritius. The data are marginal due to variable transparency but it seems clear that there was no occultation by Uranus which diminished the stellar intensity by more than 50{\%}. No ring events were observed from Mauritius due to the onset of a rain shower. Our observations at Perth, along with the null result from Mauritius, can be combined with other available data2-5 to improve the deduction of the geometry of the ring features, and to obtain a preliminary upper limit to the radius of Uranus.",
author = "Hubbard, {William B.} and Coyne, {G. V.} and T. Gehrels and Smith, {B. A.} and Zellner, {B. H.}",
year = "1977",
doi = "10.1038/268033a0",
language = "English (US)",
volume = "268",
pages = "33--34",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "5615",

}

TY - JOUR

T1 - Observations of Uranus occultation events

AU - Hubbard, William B.

AU - Coyne, G. V.

AU - Gehrels, T.

AU - Smith, B. A.

AU - Zellner, B. H.

PY - 1977

Y1 - 1977

N2 - A PRELIMINARY analysis of photometric data obtained by Zellner at the Perth Observatory during the Uranus appulse to SA0 158687 on 10 March 1977 shows at least three brief occultation events which appear to coincide with portions of a Uranian ring system reported by Elliot et al.1. No occultation by Uranus itself occurred at Perth. Our group also obtained an observation by Smith with a portable telescope from the vicinity of Mauritius. The data are marginal due to variable transparency but it seems clear that there was no occultation by Uranus which diminished the stellar intensity by more than 50%. No ring events were observed from Mauritius due to the onset of a rain shower. Our observations at Perth, along with the null result from Mauritius, can be combined with other available data2-5 to improve the deduction of the geometry of the ring features, and to obtain a preliminary upper limit to the radius of Uranus.

AB - A PRELIMINARY analysis of photometric data obtained by Zellner at the Perth Observatory during the Uranus appulse to SA0 158687 on 10 March 1977 shows at least three brief occultation events which appear to coincide with portions of a Uranian ring system reported by Elliot et al.1. No occultation by Uranus itself occurred at Perth. Our group also obtained an observation by Smith with a portable telescope from the vicinity of Mauritius. The data are marginal due to variable transparency but it seems clear that there was no occultation by Uranus which diminished the stellar intensity by more than 50%. No ring events were observed from Mauritius due to the onset of a rain shower. Our observations at Perth, along with the null result from Mauritius, can be combined with other available data2-5 to improve the deduction of the geometry of the ring features, and to obtain a preliminary upper limit to the radius of Uranus.

UR - http://www.scopus.com/inward/record.url?scp=34548367808&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548367808&partnerID=8YFLogxK

U2 - 10.1038/268033a0

DO - 10.1038/268033a0

M3 - Article

VL - 268

SP - 33

EP - 34

JO - Nature

JF - Nature

SN - 0028-0836

IS - 5615

ER -