astro.wikisort.org - Asteroid

2006 JY₂₆ is a near-Earth object that is also horseshoe companion to the Earth like 3753 Cruithne.[5]

2006 JY₂₆

Discovery
Discovered by	E. J. Christensen (Catalina Sky Survey)
Discovery date	6 May 2006
Designations
MPC designation	2006 JY26
Minor planet category	Apollo NEO[1] Earth crosser
Orbital characteristics[1][2][3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Aphelion	1.094127 AU (163.6791 Gm)
Perihelion	0.926254 AU (138.5656 Gm)
Semi-major axis	1.010191 AU (151.1224 Gm)
Eccentricity	0.083090
Orbital period (sidereal)	1.02 yr (370.85 d)
Mean anomaly	114.637°
Mean motion	0° 58m 14.632s / day
Inclination	1.43911°
Longitude of ascending node	43.4687°
Argument of perihelion	273.635°
Jupiter MOID	3.98181 AU (595.670 Gm)
Physical characteristics
Dimensions	6–13 m[a][4]
Absolute magnitude (H)	28.4[1]

Discovery, orbit and physical properties

2006 JY₂₆ was discovered by E. J. Christensen on 6 May 2006, observing for the Catalina Sky Survey.[6][7] Its orbit is characterized by low eccentricity (0.083), low inclination (1.44º) and a semi-major axis of 1.01 AU.[7] Upon discovery, it was classified as an Apollo asteroid but also an Earth crosser by the Minor Planet Center. The orbit is based on 76 observations spanning a data-arc of 4 days.[8] 2006 JY₂₆ has an absolute magnitude (H) of 28.4 which gives a characteristic diameter of about 9 meters.[8]

Impact risk

Virtual impactors[9]

Date	Impact probability (1 in)	JPL Horizons nominal geocentric distance (AU)	uncertainty region (3-sigma)
2073-05-03 09:36	330 thousand	0.025 AU (3.7 million km)	±2.4 million km
2074-05-03 00:43	210	0.0099 AU (1.48 million km)	±2.8 million km[10]
2075-05-01 10:34	2.4 million	0.14 AU (21 million km)	±23 million km

It is listed on the Sentry Risk Table with a 1 in 210 chance of impacting Earth on 3 May 2074.[9][11] The nominal best-fit orbit shows that 2006 JY₂₆ will be 0.0099 AU (1,480,000 km; 920,000 mi) from Earth on 3 May 2074.[8] An impact from this object would be less severe than the Chelyabinsk meteor.

Horseshoe companion to the Earth and orbital evolution

Recent calculations indicate that it follows a horseshoe orbit with respect to the Earth.[5] It had a close encounter with the Earth on 10 May 2006, at 0.0029 AU (430,000 km; 270,000 mi).[8] Its orbital evolution is very chaotic and its orbit is difficult to predict beyond a few hundred years.[5] Its orbit matches the expected properties of that of an object in the Arjuna-class.

Origin

It may have been originated within the Venus–Earth–Mars region or in the main asteroid belt like other near-Earth objects, then transition to Amor-class asteroid before entering Earth's co-orbital region.[5]

See also

Notes

References

Further reading

• A resonant family of dynamically cold small bodies in the near-Earth asteroid belt de la Fuente Marcos, C., de la Fuente Marcos, R. 2013, Monthly Notices of the Royal Astronomical Society: Letters, Vol. 434, Issue 1, pp. L1–L5.

External links

• 2006 JY₂₆ data at MPC
• 2006 JY₂₆ Earth Impact Risk Summary
• MPEC 2006-J38 : 2006 JY26 (Discovery MPEC)
• 2006 JY26 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2006 JY26 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2006 JY26 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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