 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.
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]
See also
- List of asteroid close approaches to Earth in 2013
- 2013 EC
- 2013 PJ10
- List of asteroid close approaches to Earth
- List of Near-Earth asteroids by distance from Sun
- Near-Earth Asteroid Tracking
References
- ^ a b c "2013 ET". Minor Planet Center. Retrieved 21 August 2017.
- ^ a b c d e "(2013 ET)". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3629117. Retrieved 21 August 2017.
- ^ a b Wall, Mike (5 March 2013). "Big Asteroid to Zoom By Earth This Weekend". Space.com.
- ^ "MPEC 2013-E14 : 2013 ET". IAU Minor Planet Center. 4 March 2012. Retrieved 9 March 2012. (K13E00T)
- ^ Dr. Lance A. M. Benner (7 March 2013). "2013 ET Goldstone Radar Observations Planning". NASA/JPL Asteroid Radar Research. Retrieved 9 March 2013.
- ^ Gray, Melissa (7 March 2013). "Asteroid to fly past Earth this weekend". Light Years. CNN.
- ^ DC Agle (18 March 2013). "Goldstone Radar Snags Images of Asteroid 2013 ET". NASA/JPL. Retrieved 19 March 2013.
- ^ a b "Four Asteroids Buzz Earth in Single Week". Space.com. Retrieved 13 November 2018.
External links
- 2013 ET at the JPL Small-Body Database
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