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Wyszukujesz frazę "Solar System bodies" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Apophis planetary defense campaign
Autorzy:
Sonbas, Eda
Bressi, Terry H.
Farnocchia, Davide
Falco, Carmelo
Morate, David
Weryk, Robert
Yim, Hong-Suh
Chastel, Serge
Marsset, Michael
Larsen, Jeffrey A.
Mastaler, Ron A.
Licandro, Javier
Taylor, Patrick A.
Pérez-Toledo, Fabricio
Warner, Elizabeth
Heinze, Aren N.
Cantillo, David
Kamiński, Krzysztof
Weiland, Henry J.
Kokina, Tatiana
Kaplan, Murat
Perminov, Alexander
Reddy, Vishnu
Kim, Myung-Jin
Chingis, Omarov
Kelley, Michael S.
Brozovic, Marina
Kamińska, Monika K.
Lees, Robert C.
Micheli, Marco
Bauer, James
Mathias, Donovan L.
Satpathy, Akash
Michel, Patrick
Moon, Hong-Kyu
Alarcon, Miguel R.
Serebryanskiy, Aleksander
de León, Julia
Elenin, Leonid
Kim, Dong-Heun
Ogłoza, Waldemar
Choi, Young-Jun
Kaiser, Galina
Mainzer, Amy
Szakáts, Robert
Christensen, Eric
Janse van Rensburg, Petro
Nastasi, Alessandro
Scotti, James V.
Cennamo, Ramona
Jacques, Cristovao
Glamazda, Dmitry
Ivanov, Alexander
McMillan, Robert S.
Lee, Hee-Jae
Serra-Ricart, Miquel
Novichonok, Artem
Pál, András
Marciniak, Anna
Buzzi, Luca
Popescu, Marcel
Tubbiolo, Andrew F.
Brucker, Melissa J.
Graziani, Filippo
Medeiros, Hissa
Schmalz, Sergei
Kuznetsov, Eduard
Dróżdż, Marek
Holman, Matthew J.
Kiss, Csaba
Read, Mike T.
Mokhnatkin, Artem
Zoła, Stanisław
Bell, David
Zhornichenko, Anastasiya
Faggioli, Laura
Roh, Dong-Goo
Veres, Peter
Reva, Inna
Erasmus, Nicolas
Polishook, David
Naidu, Shantanu P.
Benner, Lance A. M.
Wiebe, Yulia
Wheeler, Lorien F.
Petrescu, Elisabeta
Tonry, John L.
Masiero, Joseph
Rumpf, Clemens
Erece, Orhan
Reichart, Daniel E.
Barnardi, Fabrizio
Denneau, Larry
Balam, David
Żejmo, Michał
Cano, Juan
Wells, Guy
Dotson, Jessie
Wainscoat, Richard
Bamberger, Daniel
Opis:
We describe results of a planetary defense exercise conducted during the close approach to Earth by the near-Earth asteroid (99942) Apophis during 2020 December–2021 March. The planetary defense community has been conducting observational campaigns since 2017 to test the operational readiness of the global planetary defense capabilities. These community-led global exercises were carried out with the support of NASA's Planetary Defense Coordination Office and the International Asteroid Warning Network. The Apophis campaign is the third in our series of planetary defense exercises. The goal of this campaign was to recover, track, and characterize Apophis as a potential impactor to exercise the planetary defense system including observations, hypothetical risk assessment and risk prediction, and hazard communication. Based on the campaign results, we present lessons learned about our ability to observe and model a potential impactor. Data products derived from astrometric observations were available for inclusion in our risk assessment model almost immediately, allowing real-time updates to the impact probability calculation and possible impact locations. An early NEOWISE diameter measurement provided a significant improvement in the uncertainty on the range of hypothetical impact outcomes. The availability of different characterization methods such as photometry, spectroscopy, and radar provided robustness to our ability to assess the potential impact risk.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Relativistic effects in the rotation of dwarf planets and asteroids
Autorzy:
Pashkevich, Vladimir V.
Vershkov, Andrey N.
Tematy:
relativistic effects
geodetic rotation
Solar System bodies
rotation of dwarf planets
rotation of dwarf asteroids
exoplanetary systems bodies
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Centrum Badań Kosmicznych PAN
Powiązania:
https://bibliotekanauki.pl/articles/2174937.pdf  Link otwiera się w nowym oknie
Opis:
The effect of the geodetic rotation (which includes two relativistic effects: geodetic precession and geodetic nutation) is the most significant relativistic effect in the rotation of the celestial bodies. For the first time in this research, this relativistic effect is determined in the rotation of dwarf planets (Ceres, Pluto, and Charon) and asteroids (Pallas, Vesta, Lutetia, Europa, Ida, Eros, Davida, Gaspra, Steins, and Itokawa) in the Solar System with known values of their rotation parameters. Calculations of the values of their geodetic rotation are made by a method for studying any bodies in the Solar System with a long-term ephemeris. Values of geodetic precession and geodetic nutation for all these celestial bodies were calculated in ecliptic Euler angles relative to their proper coordinate systems and in their rotational elements relative to the fixed equator of the Earth and the vernal equinox (at the epoch J2000.0). The obtained analytical values of the geodetic rotation for the celestial bodies can be used to numerically investigate their rotation in the relativistic approximation, and also used to estimate the influence of relativistic effects on the orbital–rotational dynamics for the bodies of exoplanetary systems.
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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