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.
|Title||Observations of comet 19P/Borrelly by the miniature integrated camera and spectrometer aboard deep space 1|
|Authors||Laurence A. Soderblom, 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|
|Publication Subtype||Journal Article|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Astrogeology Science Center|