 Radar imaging of 2013 ET | |
| Discovery [1] | |
|---|---|
| Discovered by | Catalina Sky Survey |
| Discovery site | Mount Lemmon Obs. (first observed only) |
| Discovery date | March 3, 2013 |
| Designations | |
| 2013 ET | |
| 2001 SY169 | |
| NEO · Apollo | |
| Orbital characteristics [2] | |
| Epoch 2020-May-31 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 11 years |
| Aphelion | 1.6688 AU (249.65 Gm) |
| Perihelion | 0.74228 AU (111.044 Gm) |
| 1.2055 AU (180.34 Gm) | |
| Eccentricity | 0.38428 |
| 1.32 yr (483.49 d) | |
| 121.70° | |
| 0° 44m 39.048s /day [1] | |
| Inclination | 4.8515° |
| 171.30° | |
| 81.937° | |
| Earth MOID | 0.0041 AU (610,000 km) [2] |
| Mercury MOID | 0.287 AU (42,900,000 km) [1] |
| Physical characteristics | |
| Dimensions | 100 m (330 ft) [3] |
| 22.7 [2] | |
2013 ET is a near-Earth asteroid that was first observed on March 3, 2013, [4] six days before its closest approach to Earth. It is estimated to be around 100 meters (330 feet) wide. [3] [5] The orbit of 2001 SY169 has been connected to 2013 ET extending the observation arc to 11 years.
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Its closest approach to Earth was 0.0065207 AU (975,480 km ; 606,140 mi ) on March 9, 2013 at 12:09 UT. [2] [6] The asteroid also makes close approaches to Mars and Venus. [2] The asteroid was imaged by Goldstone radar on March 10, 2013. [7]
2013 ET was one of four asteroids that passed in the vicinity of Earth during one week in early March 2013. [8] The other asteroids in this group besides 2013 ET, included 2013 EC, 2013 EC20 , and 2013 EN20 . [8]
