학술논문

Initial results from the New Horizons exploration of 2014 MU69, a small Kuiper Belt Object
Document Type
Working Paper
Author
Stern, S. A.Weaver, H. A.Spencer, J. R.Olkin, C. B.Gladstone, G. R.Grundy, W. M.Moore, J. M.Cruikshank, D. P.Elliott, H. A.McKinnon, W. B.Parker, J. Wm.Verbiscer, A. J.Young, L. A.Aguilar, D. A.Albers, J. M.Andert, T.Andrews, J. P.Bagenal, F.Banks, M. E.Bauer, B. A.Bauman, J. A.Bechtold, K. E.Beddingfield, C. B.Behrooz, N.Beisser, K. B.Benecchi, S. D.Bernardoni, E.Beyer, R. A.Bhaskaran, S.Bierson, C. J.Binzel, R. P.Birath, E. M.Bird, M. K.Boone, D. R.Bowman, A. F.Bray, V. J.Britt, D. T.Brown, L. E.Buckley, M. R.Buie, M. W.Buratti, B. J.Burke, L. M.Bushman, S. S.Carcich, B.Chaikin, A. L.Chavez, C. L.Cheng, A. F.Colwell, E. J.Conard, S. J.Conner, M. P.Conrad, C. A.Cook, J. C.Cooper, S. B.Custodio, O. S.Ore, C. M. DalleDeboy, C. C.Dharmavaram, P.Dhingra, R. D.Dunn, G. F.Earle, A. M.Egan, A. F.Eisig, J.El-Maarry, M. R.Engelbrecht, C.Enke, B. L.Ercol, C. J.Fattig, E. D.Ferrell, C. L.Finley, T. J.Firer, J.Fischetti, J.Folkner, W. M.Fosbury, M. N.Fountain, G. H.Freeze, J. M.Gabasova, L.Glaze, L. S.Green, J. L.Griffith, G. A.Guo, Y.Hahn, M.Hals, D. W.Hamilton, D. P.Hamilton, S. A.Hanley, J. J.Harch, A.Harmon, K. A.Hart, H. M.Hayes, J.Hersman, C. B.Hill, M. E.Hill, T. A.Hofgartner, J. D.Holdridge, M. E.Horányi, M.Hosadurga, A.Howard, A. D.Howett, C. J. A.Jaskulek, S. E.Jennings, D. E.Jensen, J. R.Jones, M. R.Kang, H. K.Katz, D. J.Kaufmann, D. E.Kavelaars, J. J.Keane, J. T.Keleher, G. P.Kinczyk, M.Kochte, M. C.Kollmann, P.Krimigis, S. M.Kruizinga, G. L.Kusnierkiewicz, D. Y.Lahr, M. S.Lauer, T. R.Lawrence, G. B.Lee, J. E.Lessac-Chenen, E. J.Linscott, I. R.Lisse, C. M.Lunsford, A. W.Mages, D. M.Mallder, V. A.Martin, N. P.May, B. H.McComas, D. J.McNutt, R. L.Mehoke, Jr. D. S.Mehoke, T. S.Nelson, D. S.Nguyen, H. D.Núñez, J. I.Ocampo, A. C.Owen, W. M.Oxton, G. K.Parker, A. H.Pätzold, M.Pelgrift, J. Y.Pelletier, F. J.Pineau, J. P.Piquette, M. R.Porter, S. B.Protopapa, S.Quirico, E.Redfern, J. A.Regiec, A. L.Reitsema, H. J.Reuter, D. C.Richardson, D. C.Riedel, J. E.Ritterbush, M. A.Robbins, S. J.Rodgers, D. J.Rogers, G. D.Rose, D. M.Rosendall, P. E.Runyon, K. D.Ryschkewitsch, M. G.Saina, M. M.Salinas, M. J.Schenk, P. M.Scherrer, J. R.Schlei, W. R.Schmitt, B.Schultz, D. J.Schurr, D. C.Scipioni, F.Sepan, R. L.Shelton, R. G.Showalter, M. R.Simon, M.Singer, K. N.Stahlheber, E. W.Stanbridge, D. R.Stansberry, J. A.Steffl, A. J.Strobel, D. F.Stothoff, M. M.Stryk, T.Stuart, J. R.Summers, M. E.Tapley, M. B.Taylor, A.Taylor, H. W.Tedford, R. M.Throop, H. B.Turner, L. S.Umurhan, O. M.Van Eck, J.Velez, D.Versteeg, M. H.Vincent, M. A.Webbert, R. W.Weidner, S. E.Weigle II, G. E.Wendel, J. R.White, O. L.Whittenburg, K. E.Williams, B. G.Williams, K. E.Williams, S. P.Winters, H. L.Zangari, A. M.Zurbuchen, T. H.
Source
Science 364, eaaw9771 (2019)
Subject
Astrophysics - Earth and Planetary Astrophysics
Language
Abstract
The Kuiper Belt is a distant region of the Solar System. On 1 January 2019, the New Horizons spacecraft flew close to (486958) 2014 MU69, a Cold Classical Kuiper Belt Object, a class of objects that have never been heated by the Sun and are therefore well preserved since their formation. Here we describe initial results from these encounter observations. MU69 is a bi-lobed contact binary with a flattened shape, discrete geological units, and noticeable albedo heterogeneity. However, there is little surface color and compositional heterogeneity. No evidence for satellites, ring or dust structures, gas coma, or solar wind interactions was detected. By origin MU69 appears consistent with pebble cloud collapse followed by a low velocity merger of its two lobes.
Comment: 43 pages, 8 figure