T.L. Becker G. Bennett D. C. Boice D.T. Britt R. H. Brown B. J. Buratti C. Isbell B. Giese T. Hare M.D. Hicks Elpitha Howington-Kraus Randolph L. Kirk M. Lee R.M. Nelson J. Oberst T.C. Owen M.D. Rayman B.R. Sandel S. A. Stern N. Thomas R.V. Yelle Laurence A. Soderblom 2002 <p><span>The nucleus of the Jupiter-family comet 19P/Borrelly was closely observed by the Miniature Integrated Camera and Spectrometer aboard the Deep Space 1 spacecraft on 22 September 2001. The 8-kilometer-long body is highly variegated on a scale of 200 meters, exhibiting large albedo variations (0.01 to 0.03) and complex geologic relationships. Short-wavelength infrared spectra (1.3 to 2.6 micrometers) show a slope toward the red and a hot, dry surface (≤345 kelvin, with no trace of water ice or hydrated minerals), consistent with ∼10% or less of the surface actively sublimating. Borrelly's coma exhibits two types of dust features: fans and highly collimated jets. At encounter, the near-nucleus coma was dominated by a prominent dust jet that resolved into at least three smaller jets emanating from a broad basin in the middle of the nucleus. Because the major dust jet remained fixed in orientation, it is evidently aligned near the rotation axis of the nucleus.</span></p> application/pdf 10.1126/science.1069527 en American Association for the Advancement of Science (AAAS) Observations of comet 19P/Borrelly by the miniature integrated camera and spectrometer aboard deep space 1 article