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2013 ET

Radar imaging of 2013 ET
Discovery
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	2001 SY169
Minor planet category	NEO · Apollo
Orbital characteristics
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)
Semi-major axis	1.2055 AU (180.34 Gm)
Eccentricity	0.38428
Orbital period (sidereal)	1.32 yr (483.49 d)
Mean anomaly	121.70°
Mean motion	0° 44 39.048 /day
Inclination	4.8515°
Longitude of ascending node	171.30°
Argument of perihelion	81.937°
Earth MOID	0.0041 AU (610,000 km)
Mercury MOID	0.287 AU (42,900,000 km)
Physical characteristics
Dimensions	100 m (330 ft)
Absolute magnitude (H)	22.7

2013 ET is a near-Earth asteroid that was first observed on March 3, 2013, six days before its closest approach to Earth. It is estimated to be around 100 meters (330 feet) wide. 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. The asteroid also makes close approaches to Mars and Venus. The asteroid was imaged by Goldstone radar on March 10, 2013.

2013 ET was one of four asteroids that passed in the vicinity of Earth during one week in early March 2013. The other asteroids in this group besides 2013 ET, included 2013 EC, 2013 EC20, and 2013 EN20.

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. Archived from the original on 10 March 2013.
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.

External links

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

v t e 2013 in space
« 2012 2014 »
Space probe launches	Space probes LADEE (lunar orbiter; Sep 2013) Mars Orbiter Mission (Mars orbiter; Nov 2013) MAVEN (Mars orbiter; Nov 2013) Chang'e 3 / Yutu (mission to the Moon; Dec 2013) Space observatories IRIS (solar observation; Jun 2013) Hisaki (ultraviolet observation; Sep 2013) Gaia (astrometric observation; Dec 2013)
Impact events	Chelyabinsk meteor Chelyabinsk meteorite
Selected NEOs	Asteroid close approaches 2012 YQ1 367943 Duende 2013 EC 2013 ET (7888) 1993 UC (52760) 1998 ML14 (285263) 1998 QE2 (163364) 2002 OD20 (277475) 2005 WK4 2006 BL8 (471240) 2011 BT15 (511002) 2013 MZ5 2013 PJ10 2013 TV135 3361 Orpheus 2013 XY8 2013 YP139
Exoplanets	DENIS-P J082303.1−491201 b Gliese 504 b Gliese 667 e f g h? HD 95086 b HD 100546 b HD 106906 b blue color of HD 189733 b cloud map of Kepler-7b Kepler-37 b c d Kepler-61b Kepler-62 b c d e f Kepler-65 b c d Kepler-68 b c d Kepler-69 b c Kepler-78b exomoon candidate MOA-2011-BLG-262Lb PSO J318.5−22 (rogue planet) ROXs 42Bb
Discoveries	Luhman 16 GRB 130427A Hippocamp 1E 2259+586 anti-glitch M60-UCD1 z8_GND_5296 Hercules–Corona Borealis Great Wall Water vapor plumes of Europa
Novae	SN UDS10Wil SN 2013ej V339 Delphini SN 2013fs Nova Centauri 2013
Comets	C/2011 L4 (PANSTARRS) C/2012 F6 (Lemmon) C/2012 S4 (PANSTARRS) C/2013 A1 (Siding Spring) Comet ISON C/2013 R1 (Lovejoy) P/2013 P5 (PanSTARRS)
Space exploration	Herschel Space Observatory retirement (Jun 2013) Cassini–Huygens (The Day the Earth Smiled; Jul 2013) Voyager 1 (enters interstellar space; Sep 2013)
Outer space portal Category:2012 in outer space — Category:2013 in outer space — Category:2014 in outer space

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