(419624) 2010 SO16

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(419624) 2010 SO16
2010SO16-orbit.png
Orbit with inner solar system
Discovery [1]
Discovered by WISE
Discovery site Low Earth orbit
Discovery date17 September 2010
Designations
(419624) 2010 SO16
2010 SO16
Apollo  · NEO  · PHA [1] [2]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 5.28 yr (1,928 days)
Aphelion 1.0785 AU
Perihelion 0.9272 AU
1.0028 AU
Eccentricity 0.0754
1.00 yr (367 days)
173.30°
0° 58m 53.04s / day
Inclination 14.520°
40.397°
108.99°
Earth  MOID 0.0299 AU (11.6 LD)
Physical characteristics
Mean diameter
0.357±0.126 km [3]
0.084±0.057 [4]
20.5 [1]

    (419624) 2010 SO16 is a sub-kilometer asteroid in a co-orbital configuration with Earth, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It was discovered by the Wide-field Infrared Survey Explorer space telescope (WISE) on 17 September 2010. [1] [2]

    Contents

    Description

    The orbit was described by Apostolos Christou and David Asher at the Armagh Observatory in Northern Ireland. [5] The object has an absolute magnitude of 20.5. [1] Observations by the discovering WISE telescope give a diameter of 357 meters and an albedo of 0.084. [3] [4]

    2010 SO16 has a horseshoe orbit that allows it to stably share Earth's orbital neighborhood without colliding with it. It is one of a handful of known asteroids with an Earth-following orbit, a group that includes 3753 Cruithne, and the only known asteroid in an horseshoe orbit with Earth. It is, however, neither an Aten asteroid nor an Apollo asteroid because the semi-major axis of its orbit is neither less than nor greater than 1 AU, but oscillates between approximately 0.996 and 1.004 AU, with a period of about 350 years. [5] In its ~350 yr horseshoe cycle, it never approaches Earth more closely than about 0.15 AU, alternately trailing and leading.

    According to various simulations 2010 SO16 will remain in this orbit for at least 120,000 years and possibly for more than a million years, which is unusually stable compared to other similar objects. [6] One reason for this stability is its low orbital eccentricity, . [5]

    A precovery of 2010 SO16 may have been located in a 2005 Spitzer Space Telescope image. [7]

    Animation of (419624) 2010 SO16 orbit from 1600 to 2500
    Animation of (419624) 2010 SO16 orbit.gif
    Relative to Sun and Earth
    Animation of (419624) 2010 SO16 orbit around Earth.gif
    Around Earth - Polar view
    Animation of (419624) 2010 SO16 orbit around Earth - Equatorial view.gif
    Around Earth - Equatorial view
    Animation of (419624) 2010 SO16 orbit around Sun.gif
    Around Sun
       Sun ·   Earth ·   (419624) 2010 SO16

    See also

    Related Research Articles

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    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 419624 (2010 SO16)" (2015-12-28 last obs.). Jet Propulsion Laboratory . Retrieved 6 February 2018.
    2. 1 2 "419624 (2010 SO16)". Minor Planet Center . Retrieved 6 February 2018.
    3. 1 2 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID   9341381.
    4. 1 2 Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Cutri, R. M.; McMillan, R. S.; et al. (November 2012). "Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey". The Astrophysical Journal Letters. 760 (1): 6. arXiv: 1210.0502 . Bibcode:2012ApJ...760L..12M. doi:10.1088/2041-8205/760/1/L12. S2CID   41459166.
    5. 1 2 3 Christou, A. A.; Asher, D. J. (July 2011). "A long-lived horseshoe companion to the Earth". Monthly Notices of the Royal Astronomical Society. 414 (4): 2965–2969. arXiv: 1104.0036 . Bibcode:2011MNRAS.414.2965C. doi:10.1111/j.1365-2966.2011.18595.x. S2CID   13832179.
    6. ↑ Asteroid Discovered in Horseshoe-Shaped Orbit, The Physics arXiv Blog, Technology Review , 4/05/2011
    7. ↑ "New Tool Finds Buried Treasure in Spitzer Archives". NASA/JPL. 3 April 2014. Retrieved 25 April 2014.
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