2006 JY26
Discovery
Discovered byE. J. Christensen (Catalina Sky Survey)
Discovery date6 May 2006
Designations
2006 JY26
Orbital characteristics[1][2][3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Aphelion1.094127 AU (163.6791 Gm)
Perihelion0.926254 AU (138.5656 Gm)
1.010191 AU (151.1224 Gm)
Eccentricity0.083090
1.02 yr (370.85 d)
114.637°
0° 58m 14.632s / day
Inclination1.43911°
43.4687°
273.635°
Jupiter MOID3.98181 AU (595.670 Gm)
Physical characteristics
Dimensions6–13 m[a][4]
28.4[1]

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

    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 09:36330 thousand0.025 AU (3.7 million km)±2.4 million km
    2074-05-03 00:432100.0099 AU (1.48 million km)±2.8 million km[10]
    2075-05-01 10:342.4 million0.14 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

    • ^ This is assuming an albedo of 0.20–0.04.

    References

    1. 1 2 3 "2006 JY26". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3332535. Retrieved 30 March 2016.
    2. ↑ AstDys-2 on 2006 JY26 Retrieved 2013-05-11
    3. ↑ NEODyS-2 on 2006 JY26 Retrieved 2013-05-11
    4. ↑ Absolute-magnitude conversion table (H)
    5. 1 2 3 4 de la Fuente Marcos, C.; de la Fuente Marcos, R. (July 2013). "A resonant family of dynamically cold small bodies in the near-Earth asteroid belt". Monthly Notices of the Royal Astronomical Society: Letters. 434 (1): L1–L5. arXiv:1305.2825. Bibcode:2013MNRAS.434L...1D. doi:10.1093/mnrasl/slt062.
    6. ↑ Discovery MPEC
    7. 1 2 MPC data on 2006 JY26
    8. 1 2 3 4 JPL's Solar System Dynamics data on 2006 JY26
    9. 1 2 "Earth Impact Risk Summary: 2006 JY26". NASA/JPL Near-Earth Object Program Office. Retrieved 22 January 2018.
    10. ↑ "Horizons Batch for 2074-May-03 Virtual Impactor". JPL Horizons. Archived from the original on 5 July 2022. Retrieved 5 July 2022. RNG_3sigma = uncertainty range in km. (JPL#10/Soln.date: 2021-Apr-14 generates RNG_3sigma = 2825568 km for 2074-May-03.)
    11. ↑ "Impactor Table: 2006JY26". NEODyS-2. Retrieved 16 April 2014. (1 in 741)
    Further reading
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