2016 AJ₁₉₃, also known as 2010 KV₁₃₄, is a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.4 kilometres (0.87 mi) in diameter. It was discovered on 17 May 2010 by the Wide-field Infrared Survey Explorer (WISE) satellite, but was lost until it was reobserved on 16 January 2016.[5][2] With an observation arc over 11 years, 2016 AJ₁₉₃ has a well-determined orbit and trajectory through the year 2086.[3] The asteroid's orbit is only potentially hazardous on a time scale of thousands of years.[6][7]

2016 AJ₁₉₃

Doppler-delay radar images of 2016 AJ193 from the Goldstone Radar on 22 August 2021
Discovery[1][2]
Discovered by	WISE
Discovery site	Low Earth orbit
Discovery date	17 May 2010 (first observation only)
Designations
MPC designation	2016 AJ193
Alternative designations	2010 KV134
Minor planet category	NEO · Apollo · PHA[3]
Orbital characteristics[3]
Epoch 1 July 2020 (JD 2459396.5)
Uncertainty parameter 0
Observation arc	11.51 yr (4,204 days)
Earliest precovery date	16 February 2010
Aphelion	5.931 AU
Perihelion	0.5999 AU
Semi-major axis	3.265 AU
Eccentricity	0.8163
Orbital period (sidereal)	5.90 yr (2,155 days)
Mean anomaly	344.173°
Mean motion	0° 10m 1.359s / day
Inclination	22.570°
Longitude of ascending node	331.285°
Argument of perihelion	81.996°
Earth MOID	0.01553 AU (2,323,000 km)
Physical characteristics
Mean diameter	1.374±0.403 km[3]
Synodic rotation period	3.508±0.001 h[4]
Geometric albedo	0.031±0.031[3]
Absolute magnitude (H)	18.99[3][1]

On 21 August 2021, the asteroid safely made a close approach to Earth from a distance of 0.0229 AU (3.43 million km; 2.13 million mi), or 8.92 lunar distances (LD). During closest approach, 2016 AJ₁₉₃ reached a peak apparent magnitude of 14, visible to ground-based observers with telescope apertures of at least 20 cm (8 in).[4][6] It is the largest asteroid that approached within 10 LD (3.8 million km; 2.4 million mi) of Earth in 2021.[8]

References

External links

• Goldstone Radar Observations Planning: 2016 AJ193 and 2011 UC292, Lance A. M. Benner, Jet Propulsion Laboratory
• Radar Reveals the Surface of Asteroid 2016 AJ193, Jet Propulsion Laboratory, 3 September 2021
• 2016 AJ193 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 2016 AJ193 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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