2016 CP31

2016 CP31 is a small asteroid and Mars trojan orbiting near the L5 point of Mars (60 degrees behind Mars on its orbit).[2][3][4]

2016 CP31
Discovery
Discovered byCatalina Sky Survey
Discovery date7 February 2016
Designations
2016 CP31
Martian L5 Martian L5
Orbital characteristics[1]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc1652 days (4.52 yr)
Aphelion1.61311791 AU (241.319005 Gm)
Perihelion1.4341118 AU (214.54007 Gm)
1.52361487 AU (227.929540 Gm)
Eccentricity0.0587439
1.88 yr (686.92802 d)
122.0549°
0° 31m 26.661s /day
Inclination23.130505°
154.488290°
329.2083°
Earth MOID0.455015 AU (68.0693 Gm)
Jupiter MOID3.39497 AU (507.880 Gm)
Physical characteristics
Mean diameter
400 m
0.5-0.05 (assumed)
19.5

    Discovery, orbit and physical properties

    2016 CP31 was first observed on 7 February 2016 by the Catalina Sky Survey; the Pan-STARRS 1 telescope system at Haleakala had imaged this object on 14 January 2016 without identifying it as an asteroid.[5] Its orbit is characterized by low eccentricity (0.059), moderate inclination (23.1°) and a semi-major axis of 1.52 AU.[5] Upon discovery, it was classified as Mars-crosser by the Minor Planet Center. Its orbit is well determined as it is currently (January 2021) based on 131 observations with a data-arc span of 1652 days.[1] 2016 CP31 has an absolute magnitude of 19.5 which gives a characteristic diameter of 400 m.[1]

    Mars trojan and orbital evolution

    Recent calculations indicate that it is a stable L5 Mars trojan.[2] It may not be a member of the so-called Eureka family.

    Mars trojan

    L4 (leading):

    L5 (trailing):

    See also

    References
    1. "JPL Small-Body Database Browser: (2016 CP31)". Jet Propulsion Laboratory. Retrieved 12 January 2021.
    2. Christou, Apostolos A.; Borisov, Galin; Dell'Oro, Aldo; Jacobson, Seth A.; Cellino, Alberto; Unda-Sanzana, Eduardo (January 2020). "Population control of Mars Trojans by the Yarkovsky & YORP effects". Icarus. 335 (1): 113370 (34 pages). arXiv:1907.12858. Bibcode:2020Icar..33513370C. doi:10.1016/j.icarus.2019.07.004. S2CID 198985887.
    3. Christou, Apostolos A.; Borisov, Galin; Dell'Oro, Aldo; Cellino, Alberto; Devogèle, Maxime (January 2021). "Composition and origin of L5 Trojan asteroids of Mars: Insights from spectroscopy". Icarus. 354 (1): 113994 (22 pages). arXiv:2010.10947. Bibcode:2021Icar..35413994C. doi:10.1016/j.icarus.2020.113994. S2CID 224814529.
    4. de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (March 2021). "Using Mars co-orbitals to estimate the importance of rotation-induced YORP break-up events in Earth co-orbital space". Monthly Notices of the Royal Astronomical Society. 501 (4): 6007–6025. arXiv:2101.02563. Bibcode:2021MNRAS.501.6007D. doi:10.1093/mnras/stab062.
    5. MPC data on 2016 CP31

    Further reading
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