| Minorplanet: | yes |
| Background: |
|
| Discovered: | 13 May 1999 |
| Epoch: | 31 May 2020 (JD 2459000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 20.76 yr (7,582 days) |
| Perihelion: | 0.6946 AU |
| Semimajor: | 1.0082 AU |
| Eccentricity: | 0.31110 |
| Period: | 1.01 yr |
| Mean Motion: | / day |
| Inclination: | 5.359° |
| Asc Node: | 124.318° |
| Arg Peri: | 235.531° |
| Moid: | 0.03152 AU |
| Spectral Type: | Xk (SMASS) |
(provisional designation ) is a sub-kilometer near-Earth asteroid and a potentially hazardous object of the Apollo group. It was discovered by astronomers of the LINEAR program at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico. is a contact binary object consisting of two distinct lobes, as seen in radar images from various observatories including Arecibo and Goldstone in January 2015.
In January 2015, approached Earth within a distance of 0.0833order=flipNaNorder=flip. During the encounter, was observed by radar from the Arecibo, Green Bank, and Goldstone observatories.In January 2016, has made another close approach at a distance of 0.032AU, several times closer than the encounter in 2015.
The Minor Planet Center has classified as a potentially hazardous asteroid due to its large size and small Earth minimum orbit intersection distance (MOID) of 0.03 AU.[1]
was discovered in May 1999 by the Lincoln Near-Earth Asteroid Research (LINEAR) program at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico. Most properties of have been determined through photometry, spectroscopy, infrared radiometry, and radar imaging.[2]
Binzel et al. (2001) have found that has a spectral class of an Xk-type asteroid. Thermal infrared observations using the WISE spacecraft by Mainzer et al. (2011) and the Spitzer Space Telescope by Mueller et al. (2011) give a diameter of . Warner et al. (2014, 2015) suggest that has a highly elongated shape due to its large light curve amplitude of 0.9 magnitudes. Based on 's large brightness changes, they measured a rotation period of 6.54 hours. In January 2015, radar imaging by the Arecibo Observatory and the Green Bank Observatory confirmed 's elongated shape and provided delay-Doppler images used to obtain a preliminary estimate of a 3D model for its shape. The radar data reveal an apparent concavity and suggest that is a contact binary.[1]