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J.L. Margot, M.C. Nolan (NAIC/Cornell), S.J. Ostro, L.A.M. Benner, J.D. Giorgini (JPL/Caltech), J.F. Chandler (Center for Astrophysics), D.B. Campbell (Cornell/NAIC)
We report on observations of near-Earth objects which have taken place at Arecibo since last year's meeting. Eleven near-Earth asteroids were successfully detected in continuous wave (CW) data or imaged between October 1999 and the time of writing. Measured upper limits on rotation periods range from 10 minutes to several days for these objects with absolute magnitudes between 23.9 and 15.6. The sample of imaged objects shows range extents between 60 m and 800 m, with half of the asteroids displaying clear elongation or bifurcation. A few more seasons at this data rate will vastly improve the statistics and will allow better determination of patterns in shape, spin, and radar properties.
| Object | Date | Days | PI | Data |
| 1999 TY2 | 1999 Oct 4 | 1 | Nolan | CW |
| 1999 TN13 | 1999 Oct 18 | 1 | Benner | CW |
| 2000 EW70 | 2000 Mar 19 | 4 | Nolan | CW/imaging |
| 2000 EW70 | 2000 Mar 21 | 2 | Campbell | Synthesis imaging |
| 2000 ED14 | 2000 Mar 20 | 1 | Margot | CW |
| 2000 EE104 | 2000 Apr 8 | 4 | Margot | CW/imaging |
| 2000 EH26 | 2000 May 5 | 3 | Benner | CW/imaging |
| 2000 LF3 | 2000 Jun 15 | 2 | Nolan | CW/ranging |
| 4486 Mithra | 2000 Jul 22 | 4 | Ostro | CW/imaging |
| 1997 WU22 | 2000 Jul 22 | 4 | Ostro | CW/ranging |
| 1991 BB | 2000 Jul 23 | 3 | Ostro | CW |
| C/1999 S4 | 2000 Jul 26 | 1 | Margot | No detection |
| 2000 CE59 | 2000 Aug 8 | 2 | Margot | CW/imaging |
The National Astronomy and Ionosphere Center is operated by Cornell University under a cooperative agreement with the National Science Foundation and with additional support from NASA.