2009 SE is a small asteroid and Mars trojan orbiting near the L5 point of Mars (60 degrees behind Mars on its orbit).[2]

Discovery, orbit and physical properties

2009 SE was first observed on 16 September 2009 by the Catalina Sky Survey (CSS).[3] Its orbit is characterized by low eccentricity (0.065), moderate inclination (20.6°) and a semi-major axis of 1.52 AU.[3] 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 56 observations with a data-arc span of 3,133 days.[1] 2009 SE has an absolute magnitude of 19.9 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 with a libration period of 1430 yr and an amplitude of 70°.[2] The libration amplitude is not similar to that of 5261 Eureka and related objects.[citation needed]

Mars trojan

L4 (leading):

L5 (trailing):

See also

References

  1. ^ a b c "JPL Small-Body Database Browser: (2009 SE)". Jet Propulsion Laboratory. Retrieved 12 January 2021.
  2. ^ a b 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.
  3. ^ a b MPC data on 2009 SE

Further reading

Allikas: http://en.wikipedia.org/wiki/2009_SE
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