Zobrazeno 1 - 10
of 1 468
pro vyhledávání: '"Chesley, S. A."'
We explore the effects of the 2029 Earth encounter on asteroid (99942) Apophis' non-principal axis spin state, leveraging refined orbit, spin state, and inertia information provided by more recent optical and radar observations. Propagating the aster
Externí odkaz:
http://arxiv.org/abs/2210.13365
Autor:
Tricarico, P., Scheeres, D. J., French, A. S., McMahon, J. W., Brack, D. N., Leonard, J. M., Antreasian, P., Chesley, S. R., Farnocchia, D., Takahashi, Y., Mazarico, E. M., Rowlands, D., Highsmith, D., Getzandanner, K., Moreau, M., Johnson, C. L., Philpott, L., Bierhaus, E. B., Walsh, K. J., Barnouin, O. S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Daly, M. G., Seabrook, J. A., Nolan, M. C., Lauretta, D. S.
Exploration of asteroid (101955) Bennu by the OSIRIS-REx mission has provided an in-depth look at this rubble-pile near-Earth asteroid. In particular, the measured gravity field and the detailed shape model of Bennu indicate significant heterogeneiti
Externí odkaz:
http://arxiv.org/abs/2108.10416
Publikováno v:
Celestial Mechanics and Dynamical Astronomy (2020)
We present an approach to estimate an upper bound for the impact probability of a potentially hazardous asteroid when part of the force model depends on unknown parameters whose statistical distribution needs to be assumed. As case study we consider
Externí odkaz:
http://arxiv.org/abs/2011.13632
Autor:
Lauretta, D. S., Balram-Knutson, S. S., Beshore, E., Boynton, W. V., dAubigny, C. Drouet, DellaGiustina, D. N., Enos, H. L., Gholish, D. R., Hergenrother, C. W., Howell, E. S., Johnson, C. A., Morton, E. T., Nolan, M. C., Rizk, B., Roper, H. L., Bartels, A. E., Bos, B. J., Dworkin, J. P., Highsmith, D. E., Lorenz, D. A., Lim, L. F., Mink, R., Moreau, M. C., Nuth, J. A., Reuter, D. C., Simon, A. A., Bierhaus, E. B., Bryan, B. H., Ballouz, R., Barnouin, O. S., Binzel, R. P., Bottke, W. F., Hamilton, V. E., Walsh, K. J., Chesley, S. R., Christensen, P. R., Clark, B. E., Connolly, H. C., Crombie, M. K., Daly, M. G., Emery, J. P., McCoy, T. J., McMahon, J. W., Scheeres, D. J., Messenger, S., Nakamura-Messenger, K., Righter, K., Sandford, S. A.
In May of 2011, NASA selected the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) asteroid sample return mission as the third mission in the New Frontiers program. The other two New Frontiers mis
Externí odkaz:
http://arxiv.org/abs/1702.06981
Near-Earth asteroid 2014 AA entered the Earth's atmosphere on 2014 January 2, only 21 hours after being discovered by the Catalina Sky Survey. In this paper we compute the trajectory of 2014 AA by combining the available optical astrometry, seven gro
Externí odkaz:
http://arxiv.org/abs/1601.03339
Autor:
Farnocchia, D., Chesley, S. R., Micheli, M., Delamere, A., Heyd, R. S., Tholen, D. J., Giorgini, J. D., Owen, W. M., Tamppari, L. K.
The Mars flyby of C/2013 A1 (Siding Spring) represented a unique opportunity for imaging a long-period comet and resolving its nucleus and rotation period. Because of the small encounter distance and the high relative velocity, the goal of successful
Externí odkaz:
http://arxiv.org/abs/1507.01980
We describe systematic ranging, an orbit determination technique especially suitable to assess the near-term Earth impact hazard posed by newly discovered asteroids. For these late warning cases, the time interval covered by the observations is gener
Externí odkaz:
http://arxiv.org/abs/1504.00025
The Yarkovsky effect describes a small but significant force that affects the orbital motion of meteoroids and asteroids smaller than $30-40$ kilometers in diameter. It is caused by sunlight; when these bodies heat up in the Sun, they eventually re-r
Externí odkaz:
http://arxiv.org/abs/1502.01249
Autor:
Spoto, F., Milani, A., Farnocchia, D., Chesley, S. R., Micheli, M., Valsecchi, G. B., Perna, D., Hainaut, O.
Asteroid 2009 FD could impact Earth between 2185 and 2196. The long term propagation to the possible impacts and the intervening planetary encounters make 2009 FD one of the most challenging asteroids in terms of hazard assessment. To compute accurat
Externí odkaz:
http://arxiv.org/abs/1408.0736
We provide a scheme to correct asteroid astrometric observations for star catalog systematic errors due to inaccurate star positions and proper motions. As reference we select the most accurate stars in the PPMXL catalog, i.e., those based on 2MASS a
Externí odkaz:
http://arxiv.org/abs/1407.8317