Title

EPOXI: COMET 103P/HARTLEY 2 OBSERVATIONS FROM A WORLDWIDE CAMPAIGN

Authors

Authors

K. J. Meech; M. F. A'Hearn; J. A. Adams; P. Bacci; J. Bai; L. Barrera; M. Battelino; J. M. Bauer; E. Becklin; B. Bhatt; N. Biver; D. Bockelee-Morvan; D. Bodewits; H. Bohnhardt; J. Boissier; B. P. Bonev; W. Borghini; J. R. Brucato; E. Bryssinck; M. W. Buie; H. Canovas; D. Castellano; S. B. Charnley; W. P. Chen; P. Chiang; Y. J. Choi; D. J. Christian; Y. L. Chuang; A. L. Cochran; P. Colom; M. R. Combi; I. M. Coulson; J. Crovisier; N. Dello Russo; K. Dennerl; K. DeWahl; M. A. DiSanti; M. Facchini; T. L. Farnham; Y. Fernandez; H. G. Floren; U. Frisk; T. Fujiyoshi; R. Furusho; T. Fuse; G. Galli; D. A. Garcia-Hernandez; A. Gersch; Z. Getu; E. L. Gibb; M. Gillon; E. Guido; R. A. Guillermo; E. Hadamcik; O. Hainaut; H. B. Hammel; D. E. Harker; J. K. Harmon; W. M. Harris; P. Hartogh; M. Hashimoto; B. Hausler; T. Herter; A. Hjalmarson; S. T. Holland; M. Honda; S. Hosseini; E. S. Howell; N. Howes; H. H. Hsieh; H. Y. Hsiao; D. Hutsemekers; S. M. Immler; W. M. Jackson; S. V. Jeffers; E. Jehin; T. J. Jones; M. D. Ovelar; H. M. Kaluna; T. Karlsson; H. Kawakita; J. V. Keane; L. D. Keller; M. S. Kelley; D. Kinoshita; N. N. Kiselev; J. Kleyna; M. M. Knight; H. Kobayashi; H. A. Kobulnicky; L. Kolokolova; M. Kreiny; Y. J. Kuan; M. Kuppers; J. M. Lacruz; W. B. Landsman; L. M. Lara; A. Lecacheux; A. C. Levasseur-Regourd; B. Li; J. Licandro; R. Ligustri; Z. Y. Lin; M. Lippi; D. C. Lis; C. M. Lisse; A. J. Lovell; S. C. Lowry; H. Lu; S. Lundin; K. Magee-Sauer; P. Magain; J. Manfroid; E. M. Epifani; A. McKay; M. D. Melita; H. Mikuz; S. N. Milam; G. Milani; M. Min; R. Moreno; B. E. A. Mueller; M. J. Mumma; M. Nicolini; M. C. Nolan; H. L. Nordh; P. B. Nowajewski; O. Team; T. Ootsubo; L. Paganini; C. Perrella; J. Pittichova; E. Prosperi; Y. L. Radeva; W. T. Reach; A. J. Remijan; M. Rengel; T. E. Riesen; M. Rodenhuis; D. P. Rodriguez; R. W. Russell; D. K. Sahu; N. H. Samarasinha; A. S. Caso; A. Sandqvist; G. Sarid; M. Sato; D. G. Schleicher; E. W. Schwieterman; A. K. Sen; D. Shenoy; J. C. Shi; Y. Shinnaka; J. Skvarc; C. Snodgrass; M. L. Sitko; S. Sonnett; S. Sosseini; G. Sostero; S. Sugita; B. M. Swinyard; S. Szutowicz; N. Takato; P. Tanga; P. A. Taylor; G. P. Tozzi; R. Trabatti; J. M. Trigo-Rodriguez; C. Tubiana; M. de Val-Borro; W. Vacca; B. Vandenbussche; J. Vaubaillion; F. P. Velichko; S. F. Velichko; R. J. Vervack; M. J. Vidal-Nunez; G. L. Villanueva; C. Vinante; J. B. Vincent; M. Wang; L. H. Wasserman; J. Watanabe; H. A. Weaver; P. R. Weissman; S. Wolk; D. H. Wooden; C. E. Woodward; M. Yamaguchi; T. Yamashita; P. A. Yanamandra-Fischer; B. Yang; J. S. Yao; D. K. Yeomans; T. Zenn; H. Zhao;J. E. Ziffer

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Astrophys. J. Lett.

Keywords

comets: individual (103P/Hartley 2); MIDINFRARED SPECTROMETER; SPACE-TELESCOPE; HERSCHEL; PERFORMANCE; PHOTOMETRY; MISSION; NUCLEUS; IMAGER; MIRSI; DUST; Astronomy & Astrophysics

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 similar to 16.4 hr. Starting in 2010 August the period changed from 16.6 hr to near 19 hr 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 CO2-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.

Journal Title

Astrophysical Journal Letters

Volume

734

Issue/Number

1

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

9

WOS Identifier

WOS:000293135500001

ISSN

2041-8205

Share

COinS