Orbit and bulk density of the OSIRIS-REx target Asteroid (101955) Bennu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10287745" target="_blank" >RIV/00216208:11320/14:10287745 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.icarus.2014.02.020" target="_blank" >http://dx.doi.org/10.1016/j.icarus.2014.02.020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2014.02.020" target="_blank" >10.1016/j.icarus.2014.02.020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Orbit and bulk density of the OSIRIS-REx target Asteroid (101955) Bennu

Popis výsledku v původním jazyce

The target asteroid of the OSIRIS-REx asteroid sample return mission, (101955) Bennu (formerly 1999 RQ(36)), is a half-kilometer near-Earth asteroid with an extraordinarily well constrained orbit. An extensive data set of optical astrometry from 1999 to2013 and high-quality radar delay measurements to Bennu in 1999, 2005, and 2011 reveal the action of the Yarkovsky effect, with a mean semimajor axis drift rate da/dt = (-19.0 0.1) x 10(-4) au/Myr or 284 +/- 1.5 m/year. The accuracy of this result depends critically on the fidelity of the observational and dynamical model. As an example, neglecting the relativistic perturbations of the Earth during close approaches affects the orbit with 3 sigma significance in da/dt. The orbital deviations from purelygravitational dynamics allow us to deduce the acceleration of the Yarkovsky effect, while the known physical characterization of Bennu allows us to independently model the force due to thermal emissions. The combination of these two analy

Název v anglickém jazyce

Orbit and bulk density of the OSIRIS-REx target Asteroid (101955) Bennu

Popis výsledku anglicky

The target asteroid of the OSIRIS-REx asteroid sample return mission, (101955) Bennu (formerly 1999 RQ(36)), is a half-kilometer near-Earth asteroid with an extraordinarily well constrained orbit. An extensive data set of optical astrometry from 1999 to2013 and high-quality radar delay measurements to Bennu in 1999, 2005, and 2011 reveal the action of the Yarkovsky effect, with a mean semimajor axis drift rate da/dt = (-19.0 0.1) x 10(-4) au/Myr or 284 +/- 1.5 m/year. The accuracy of this result depends critically on the fidelity of the observational and dynamical model. As an example, neglecting the relativistic perturbations of the Earth during close approaches affects the orbit with 3 sigma significance in da/dt. The orbital deviations from purelygravitational dynamics allow us to deduce the acceleration of the Yarkovsky effect, while the known physical characterization of Bennu allows us to independently model the force due to thermal emissions. The combination of these two analy

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-01308S" target="_blank" >GA13-01308S: Dynamika malých těles sluneční soustavy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Icarus

ISSN

0019-1035

e-ISSN

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Svazek periodika

235

Číslo periodika v rámci svazku

červen

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

5-22

Kód UT WoS článku

000335291600002

EID výsledku v databázi Scopus

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