2013 ET

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]

2013 ET

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
MPC designation	2013 ET
Alternative designations	MPO 307059
Minor planet category	NEO · Apollo
Orbital characteristics[2]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3[1]
Observation arc	6[1] d
Aphelion	1.66881 AU (249.650 Gm)
Perihelion	0.74239 AU (111.060 Gm)
Semi-major axis	1.20560 AU (180.355 Gm)
Eccentricity	0.38421
Orbital period	1.32 yr (483.506 d) 1.32 yr
Mean anomaly	97.151°
Mean motion	0° 44^m 39.048^s /day[1]
Inclination	4.85153°
Longitude of ascending node	171.316°
Argument of perihelion	81.911°
Earth MOID	0.00375179 AU (561,260 km)[2]
Mercury MOID	0.28725 AU (42,972,000 km)[1]
Physical characteristics
Dimensions	100 m (330 ft)[3]
Absolute magnitude (H)	23.1[2]

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.[9]

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

1. "2013 ET". Minor Planet Center. Retrieved 21 August 2017.
2. "(2013 ET)". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3629117. Retrieved 21 August 2017.
3. Wall, Mike (5 March 2013). "Big Asteroid to Zoom By Earth This Weekend". Space.com.
4. "MPEC 2013-E14 : 2013 ET". IAU Minor Planet Center. 4 March 2012. Retrieved 9 March 2012. (K13E00T)
5. Dr. Lance A. M. Benner (7 March 2013). "2013 ET Goldstone Radar Observations Planning". NASA/JPL Asteroid Radar Research. Retrieved 9 March 2013.
6. Gray, Melissa (7 March 2013). "Asteroid to fly past Earth this weekend". Light Years. CNN.
7. DC Agle (18 March 2013). "Goldstone Radar Snags Images of Asteroid 2013 ET". NASA/JPL. Retrieved 19 March 2013.
8. "Four Asteroids Buzz Earth in Single Week". Space.com. Retrieved 13 November 2018.
9. "Four Asteroids Buzz Earth in Single Week". Space.com. Retrieved 13 November 2018.

External links

• 2013 ET at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters