EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign

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. Bockelée-Morvan; D. Bodewits; H. Böhnhardt; 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. Fernández; H. G. Florén; U. Frisk; T. Fujiyoshi; R. Furusho; T. Fuse; G. Galli; D. A. García-Hernández; 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. Ḧausler; T. Herter; A. Hjalmarson; S. T. Holland; M. Honda; S. Hosseini; E. S. Howell; N. Howes; H. H. Hsieh; H. Y. Hsiao; D. Hutsemékers; S. M. Immler; W. M. Jackson; S. V. Jeffers; E. Jehin; T. J. Jones; M. De Juan 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. Küppers; 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. Mazzotta 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; Odin Team; T. Ootsubo; L. Paganini; C. Perrella; J. Pittichová; E. Prosperi; Y. L. Radeva; W. T. Reach; A. J. Remijan; M. Rengel; T. E. Riesen; M. Rodenhuis; D. P. Rodríguez; R. W. Russell; D. K. Sahu; N. H. Samarasinha; A. Sánchez 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-Rodríguez; 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

doi:10.1088/2041-8205/734/1/L1

EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign

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. Bockelée-Morvan, D. Bodewits, H. Böhnhardt, J. Boissier, B. P. Bonev, W. Borghini, J. R. Brucato, E. Bryssinck, M. W. BuieH. 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. Fernández, H. G. Florén, U. Frisk, T. Fujiyoshi, R. Furusho, T. Fuse, G. Galli, D. A. García-Hernández, 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. Ḧausler, T. Herter, A. Hjalmarson, S. T. Holland, M. Honda, S. Hosseini, E. S. Howell, N. Howes, H. H. Hsieh, H. Y. Hsiao, D. Hutsemékers, S. M. Immler, W. M. Jackson, S. V. Jeffers, E. Jehin, T. J. Jones, M. De Juan 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. Küppers, 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. Mazzotta 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, Odin Team, T. Ootsubo, L. Paganini, C. Perrella, J. Pittichová, E. Prosperi, Y. L. Radeva, W. T. Reach, A. J. Remijan, M. Rengel, T. E. Riesen, M. Rodenhuis, D. P. Rodríguez, R. W. Russell, D. K. Sahu, N. H. Samarasinha, A. Sánchez 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-Rodríguez, 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

Research output: Contribution to journal › Article › peer-review

92 Scopus citations

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.

Original language	English (US)
Article number	L1
Journal	Astrophysical Journal Letters
Volume	734
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/734/1/L1
State	Published - Jun 10 2011

Keywords

comets: individual (103P/Hartley 2)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1088/2041-8205/734/1/L1

Cite this

Meech, K. J., A'Hearn, M. F., Adams, J. A., Bacci, P., Bai, J., Barrera, L., Battelino, M., Bauer, J. M., Becklin, E., Bhatt, B., Biver, N., Bockelée-Morvan, D., Bodewits, D., Böhnhardt, H., Boissier, J., Bonev, B. P., Borghini, W., Brucato, J. R., Bryssinck, E., ... Ziffer, J. E. (2011). EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign. Astrophysical Journal Letters, 734(1), Article L1. https://doi.org/10.1088/2041-8205/734/1/L1

Meech, KJ, A'Hearn, MF, Adams, JA, Bacci, P, Bai, J, Barrera, L, Battelino, M, Bauer, JM, Becklin, E, Bhatt, B, Biver, N, Bockelée-Morvan, D, Bodewits, D, Böhnhardt, H, Boissier, J, Bonev, BP, Borghini, W, Brucato, JR, Bryssinck, E, Buie, MW, Canovas, H, Castellano, D, Charnley, SB, Chen, WP, Chiang, P, Choi, YJ, Christian, DJ, Chuang, YL, Cochran, AL, Colom, P, Combi, MR, Coulson, IM, Crovisier, J, Dello Russo, N, Dennerl, K, DeWahl, K, DiSanti, MA, Facchini, M, Farnham, TL, Fernández, Y, Florén, HG, Frisk, U, Fujiyoshi, T, Furusho, R, Fuse, T, Galli, G, García-Hernández, DA, Gersch, A, Getu, Z, Gibb, EL, Gillon, M, Guido, E, Guillermo, RA, Hadamcik, E, Hainaut, O, Hammel, HB, Harker, DE, Harmon, JK, Harris, WM, Hartogh, P, Hashimoto, M, Ḧausler, B, Herter, T, Hjalmarson, A, Holland, ST, Honda, M, Hosseini, S, Howell, ES, Howes, N, Hsieh, HH, Hsiao, HY, Hutsemékers, D, Immler, SM, Jackson, WM, Jeffers, SV, Jehin, E, Jones, TJ, De Juan Ovelar, M, Kaluna, HM, Karlsson, T, Kawakita, H, Keane, JV, Keller, LD, Kelley, MS, Kinoshita, D, Kiselev, NN, Kleyna, J, Knight, MM, Kobayashi, H, Kobulnicky, HA, Kolokolova, L, Kreiny, M, Kuan, YJ, Küppers, M, Lacruz, JM, Landsman, WB, Lara, LM, Lecacheux, A, Levasseur-Regourd, AC, Li, B, Licandro, J, Ligustri, R, Lin, ZY, Lippi, M, Lis, DC, Lisse, CM, Lovell, AJ, Lowry, SC, Lu, H, Lundin, S, Magee-Sauer, K, Magain, P, Manfroid, J, Mazzotta Epifani, E, McKay, A, Melita, MD, Mikuz, H, Milam, SN, Milani, G, Min, M, Moreno, R, Mueller, BEA, Mumma, MJ, Nicolini, M, Nolan, MC, Nordh, HL, Nowajewski, PB, Team, O, Ootsubo, T, Paganini, L, Perrella, C, Pittichová, J, Prosperi, E, Radeva, YL, Reach, WT, Remijan, AJ, Rengel, M, Riesen, TE, Rodenhuis, M, Rodríguez, DP, Russell, RW, Sahu, DK, Samarasinha, NH, Sánchez Caso, A, Sandqvist, A, Sarid, G, Sato, M, Schleicher, DG, Schwieterman, EW, Sen, AK, Shenoy, D, Shi, JC, Shinnaka, Y, Skvarc, J, Snodgrass, C, Sitko, ML, Sonnett, S, Sosseini, S, Sostero, G, Sugita, S, Swinyard, BM, Szutowicz, S, Takato, N, Tanga, P, Taylor, PA, Tozzi, GP, Trabatti, R, Trigo-Rodríguez, JM, Tubiana, C, De Val-Borro, M, Vacca, W, Vandenbussche, B, Vaubaillion, J, Velichko, FP, Velichko, SF, Vervack, RJ, Vidal-Nunez, MJ, Villanueva, GL, Vinante, C, Vincent, JB, Wang, M, Wasserman, LH, Watanabe, J, Weaver, HA, Weissman, PR, Wolk, S, Wooden, DH, Woodward, CE, Yamaguchi, M, Yamashita, T, Yanamandra-Fischer, PA, Yang, B, Yao, JS, Yeomans, DK, Zenn, T, Zhao, H & Ziffer, JE 2011, 'EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign', Astrophysical Journal Letters, vol. 734, no. 1, L1. https://doi.org/10.1088/2041-8205/734/1/L1

@article{be283520cc794294ae042e4a039ecc56,

title = "EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign",

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.",

keywords = "comets: individual (103P/Hartley 2)",

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

year = "2011",

month = jun,

day = "10",

doi = "10.1088/2041-8205/734/1/L1",

language = "English (US)",

volume = "734",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - EPOXI

T2 - Comet 103P/Hartley 2 observations from a worldwide campaign

AU - Meech, K. J.

AU - A'Hearn, M. F.

AU - Adams, J. A.

AU - Bacci, P.

AU - Bai, J.

AU - Barrera, L.

AU - Battelino, M.

AU - Bauer, J. M.

AU - Becklin, E.

AU - Bhatt, B.

AU - Biver, N.

AU - Bockelée-Morvan, D.

AU - Bodewits, D.

AU - Böhnhardt, H.

AU - Boissier, J.

AU - Bonev, B. P.

AU - Borghini, W.

AU - Brucato, J. R.

AU - Bryssinck, E.

AU - Buie, M. W.

AU - Canovas, H.

AU - Castellano, D.

AU - Charnley, S. B.

AU - Chen, W. P.

AU - Chiang, P.

AU - Choi, Y. J.

AU - Christian, D. J.

AU - Chuang, Y. L.

AU - Cochran, A. L.

AU - Colom, P.

AU - Combi, M. R.

AU - Coulson, I. M.

AU - Crovisier, J.

AU - Dello Russo, N.

AU - Dennerl, K.

AU - DeWahl, K.

AU - DiSanti, M. A.

AU - Facchini, M.

AU - Farnham, T. L.

AU - Fernández, Y.

AU - Florén, H. G.

AU - Frisk, U.

AU - Fujiyoshi, T.

AU - Furusho, R.

AU - Fuse, T.

AU - Galli, G.

AU - García-Hernández, D. A.

AU - Gersch, A.

AU - Getu, Z.

AU - Gibb, E. L.

AU - Gillon, M.

AU - Guido, E.

AU - Guillermo, R. A.

AU - Hadamcik, E.

AU - Hainaut, O.

AU - Hammel, H. B.

AU - Harker, D. E.

AU - Harmon, J. K.

AU - Harris, W. M.

AU - Hartogh, P.

AU - Hashimoto, M.

AU - Ḧausler, B.

AU - Herter, T.

AU - Hjalmarson, A.

AU - Holland, S. T.

AU - Honda, M.

AU - Hosseini, S.

AU - Howell, E. S.

AU - Howes, N.

AU - Hsieh, H. H.

AU - Hsiao, H. Y.

AU - Hutsemékers, D.

AU - Immler, S. M.

AU - Jackson, W. M.

AU - Jeffers, S. V.

AU - Jehin, E.

AU - Jones, T. J.

AU - De Juan Ovelar, M.

AU - Kaluna, H. M.

AU - Karlsson, T.

AU - Kawakita, H.

AU - Keane, J. V.

AU - Keller, L. D.

AU - Kelley, M. S.

AU - Kinoshita, D.

AU - Kiselev, N. N.

AU - Kleyna, J.

AU - Knight, M. M.

AU - Kobayashi, H.

AU - Kobulnicky, H. A.

AU - Kolokolova, L.

AU - Kreiny, M.

AU - Kuan, Y. J.

AU - Küppers, M.

AU - Lacruz, J. M.

AU - Landsman, W. B.

AU - Lara, L. M.

AU - Lecacheux, A.

AU - Levasseur-Regourd, A. C.

AU - Li, B.

AU - Licandro, J.

AU - Ligustri, R.

AU - Lin, Z. Y.

AU - Lippi, M.

AU - Lis, D. C.

AU - Lisse, C. M.

AU - Lovell, A. J.

AU - Lowry, S. C.

AU - Lu, H.

AU - Lundin, S.

AU - Magee-Sauer, K.

AU - Magain, P.

AU - Manfroid, J.

AU - Mazzotta Epifani, E.

AU - McKay, A.

AU - Melita, M. D.

AU - Mikuz, H.

AU - Milam, S. N.

AU - Milani, G.

AU - Min, M.

AU - Moreno, R.

AU - Mueller, B. E.A.

AU - Mumma, M. J.

AU - Nicolini, M.

AU - Nolan, M. C.

AU - Nordh, H. L.

AU - Nowajewski, P. B.

AU - Team, Odin

AU - Ootsubo, T.

AU - Paganini, L.

AU - Perrella, C.

AU - Pittichová, J.

AU - Prosperi, E.

AU - Radeva, Y. L.

AU - Reach, W. T.

AU - Remijan, A. J.

AU - Rengel, M.

AU - Riesen, T. E.

AU - Rodenhuis, M.

AU - Rodríguez, D. P.

AU - Russell, R. W.

AU - Sahu, D. K.

AU - Samarasinha, N. H.

AU - Sánchez Caso, A.

AU - Sandqvist, A.

AU - Sarid, G.

AU - Sato, M.

AU - Schleicher, D. G.

AU - Schwieterman, E. W.

AU - Sen, A. K.

AU - Shenoy, D.

AU - Shi, J. C.

AU - Shinnaka, Y.

AU - Skvarc, J.

AU - Snodgrass, C.

AU - Sitko, M. L.

AU - Sonnett, S.

AU - Sosseini, S.

AU - Sostero, G.

AU - Sugita, S.

AU - Swinyard, B. M.

AU - Szutowicz, S.

AU - Takato, N.

AU - Tanga, P.

AU - Taylor, P. A.

AU - Tozzi, G. P.

AU - Trabatti, R.

AU - Trigo-Rodríguez, J. M.

AU - Tubiana, C.

AU - De Val-Borro, M.

AU - Vacca, W.

AU - Vandenbussche, B.

AU - Vaubaillion, J.

AU - Velichko, F. P.

AU - Velichko, S. F.

AU - Vervack, R. J.

AU - Vidal-Nunez, M. J.

AU - Villanueva, G. L.

AU - Vinante, C.

AU - Vincent, J. B.

AU - Wang, M.

AU - Wasserman, L. H.

AU - Watanabe, J.

AU - Weaver, H. A.

AU - Weissman, P. R.

AU - Wolk, S.

AU - Wooden, D. H.

AU - Woodward, C. E.

AU - Yamaguchi, M.

AU - Yamashita, T.

AU - Yanamandra-Fischer, P. A.

AU - Yang, B.

AU - Yao, J. S.

AU - Yeomans, D. K.

AU - Zenn, T.

AU - Zhao, H.

AU - Ziffer, J. E.

PY - 2011/6/10

Y1 - 2011/6/10

N2 - 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.

AB - 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.

KW - comets: individual (103P/Hartley 2)

UR - http://www.scopus.com/inward/record.url?scp=79959462185&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79959462185&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/734/1/L1

DO - 10.1088/2041-8205/734/1/L1

M3 - Article

SN - 2041-8205

VL - 734

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L1

ER -

EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign

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