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Abstract:

Earth- and space-based observations provide synergistic information for space mission encounters by providing data over longer timescales, at different wavelengths and using techniques that are impossible with an in situ flyby. We report here such observations in support of the EPOXI spacecraft flyby of comet 103P/Hartley 2. The nucleus is small and dark, and exhibited a very rapidly changing rotation period. Prior to the onset of activity, the period was 16.4hr. Starting in 2010 August the period changed from 16.6hr to near 19hr in December. With respect to dust composition, most volatiles and carbon and nitrogen isotope ratios, the comet is similar to other Jupiter-family comets. What is unusual is the dominance of CO 2 -driven activity near perihelion, which likely persists out to aphelion. Near perihelion the comet nucleus was surrounded by a large halo of water-ice grains that contributed significantly to the total water production. © 2011. The American Astronomical Society. All rights reserved..

Registro:

Documento: Artículo
Título:EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign
Autor:Meech, K.J. et al.
Este artículo contiene 197 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 197 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:comets: individual (103P/Hartley 2)
Año:2011
Volumen:734
Número:1 PART 2
DOI: http://dx.doi.org/10.1088/2041-8205/734/1/L1
Título revista:Astrophysical Journal Letters
Título revista abreviado:Astrophys. J. Lett.
ISSN:20418205
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20418205_v734_n1PART2_p_Meech

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Citas:

---------- APA ----------
(2011) . EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign. Astrophysical Journal Letters, 734(1 PART 2).
http://dx.doi.org/10.1088/2041-8205/734/1/L1
---------- CHICAGO ----------
Meech, K.J. "EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign" . Astrophysical Journal Letters 734, no. 1 PART 2 (2011).
http://dx.doi.org/10.1088/2041-8205/734/1/L1
---------- MLA ----------
Meech, K.J. "EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign" . Astrophysical Journal Letters, vol. 734, no. 1 PART 2, 2011.
http://dx.doi.org/10.1088/2041-8205/734/1/L1
---------- VANCOUVER ----------
Meech, K.J. EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign. Astrophys. J. Lett. 2011;734(1 PART 2).
http://dx.doi.org/10.1088/2041-8205/734/1/L1