Results 221 to 230 of about 373 (258)

Possible Effects of Volcanic Eruptions on the Modern Atmosphere of Venus. [PDF]

open access: yesSpace Sci Rev
Wilson CF   +9 more
europepmc   +1 more source

SORA: Stellar Occultation Reduction and Analysis [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2022
ABSTRACT The stellar occultation technique provides competitive accuracy in determining the sizes, shapes, astrometry, etc., of the occulting body, comparable to in-situ observations by spacecraft. With the increase in the number of known Solar system objects expected from the LSST, the highly precise astrometric catalogs, such as ...
Yücel Kilic   +2 more
exaly   +6 more sources

Stellar Occultations by Trans-Neptunian Objects

open access: yesAstronomy and Astrophysics Review, 2023
Stellar occultations provide a powerful tool to explore objects of the outer solar system. The Gaia mission now provides milli-arcsec accuracy on the predictions of these events and makes possible observations that were previously unthinkable. Occultations return kilometric accuracies on the three-dimensional shape of bodies irrespective of their ...
Françoise Roques   +2 more
exaly   +7 more sources

On stellar occultations by comets

Icarus, 1983
Abstract Stellar occultations by comets can be used for studying the dust opacity of the coma in the vicinity of the cometary nucleus. This method provides high spatial resolution. If faint stars ( V ≤ 15) are used in the densest regions of the sky, the event probability is typically one every 2 hr. This probability can be enhanced by a factor of 40
M. Combes   +5 more
openaire   +1 more source

Stellar Occultation by 2060 Chiron

Icarus, 1996
Abstract A 14th magnitude double star was occulted by 2060 Chiron on 1993 November 7. Observations of this event were obtained from five locations in California. An occultation by Chiron's nucleus was recorded at one of these sites, while a possible graze by the nucleus was seen at the next closest location.
Schelte J. Bus   +20 more
openaire   +1 more source

Probing Titan's atmosphere by stellar occultation

Nature, 1990
WE report results from the first stellar occultation by Titan ever observed. As predicted by Wasserman1, on 3 July 1989 the bright star 28 Sagittarii (visual magnitude, V ≈ 5.5), passed behind Saturn's giant moon ( V ≈ 8.3), which is the only body in the Solar System that, like the Earth, has a dense, nitrogen-rich atmosphere2.
Sicardy, B.   +16 more
openaire   +2 more sources

Tomographic Inversion of Stellar Occultation Measurements

Optical Remote Sensing of the Atmosphere, 1993
We have studied the possibilities of the stellar occultation method in monitoring the global distribution of stratospheric ozone. In this paper we discuss the tomographic inversion problem of stellar occultations. We present different techniques and compare them using the characteristic properties of GOMOS instrument.
Johanna Tamminen   +4 more
openaire   +1 more source

PROBING PLANETARY ATMOSPHERES WITH STELLAR OCCULTATIONS

Annual Review of Earth and Planetary Sciences, 1996
▪ Abstract  Earth-based stellar occultations probe the temperature, pressure, and number-density profiles of planetary atmospheres in the microbar range with a vertical resolution of a few kilometers. Depending on the occultation data available for a given body and other information, the technique also allows determination of local density variations,
J. L. Elliot, C. B. Olkin
openaire   +1 more source

Uranus Stellar Occultation 2025: Report and Preliminary Results from the Largest Uranus Stellar Occultation Campaign

Background: UV occultations measured by Voyager 2 (V2) during its flyby of Uranus in 1986 detected a warm stratosphere and extremely hot thermosphere [1,2], far in excess of solar irradiance [3,4] or internal heating [5]. These measurements imply that Uranus has the coldest lower stratosphere and yet the hottest thermosphere of any Solar System planet [
William Saunders, Kunio Sayanagi
openaire   +1 more source

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