نتایج جستجو برای: occultation
تعداد نتایج: 1773 فیلتر نتایج به سال:
Introduction: The Trans-Neptunian Objects (TNOs) are the frozen leftovers from the formation period of the outer solar system [1]. The current total mass in the Kuiper Belt is estimated to be around 0.03-0.3 Earth masses [2], but there is evidence that a much larger mass (10-40 M Earth) was originally present at the time of formation [3]. The direct observation of the TNOs does not allow reachi...
Reduction of radio occultation data to retrieve atmospheric profiles (T-p(r)) requires knowledge or assumption of the horizontal structure of the atmosphere. In the case of terrestrial planets the atmosphere in the vicinity of ray periapsides usually is assumed to be spherically symmetric. This assumption leads to an integral transform relationship between the profiles of refractivity versus ra...
In the present decade and beyond, now 51 years after last Apollo landing, NASA Artemis human exploration program will offer abundant opportunities for heliophysics investigations from, by, of Moon from vantage points lunar orbit surface. The Lunar Solar Occultation Explorer (LunaSOX) concept uses limb to occult solar disk high-resolution coronal observations at hourly, daily, biweekly cadences ...
The Princeton University Ultraviolet Spectrometer-Telescope on the NASA Orbiting Astronomical Observatory Copernicus was used for stellar occultation measurements of atmospheric ozone. Two sets of observations of the target star 8-Cen were carried out on 26 July 1975 and 13-14 June 1976 at wavelengths from 2550• to 3100•. After unfolding of the data, ozone density profiles near the equator with...
We present the analysis of high angular resolution observations of the triple asteroid (87) Sylvia collected with three 8–10 m class telescopes (Keck, VLT, Gemini North) and the Hubble Space Telescope. The moons’ mutual orbits were derived individually using a purely Keplerian model. We computed the position of Romulus, the outer moon of the system, at the epoch of a recent stellar occultation ...
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