(164207) 2004 GU9

Last updated

(164207) 2004 GU9
Discovery [1]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date13 April 2004
Designations
NEO  · Apollo
Orbital characteristics [2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 5424 days (14.85 yr)
Aphelion 1.1376258581  AU (170.18640603  Gm)
Perihelion 0.86490477 AU (129.387912 Gm)
1.001265315 AU (149.7871591 Gm)
Eccentricity 0.1361882
1.00 yr (365.95 d)
154.915171°
0° 59m 1.464s / day
Inclination 13.6490265°
38.6405971°
280.55672±0.00007 °
2456145.53817±0.00006 jd
280.28542°
Earth  MOID 0.000389702 AU (58,298.6 km)
Physical characteristics
Mean diameter
160–360 meters [3]
0.219
21.1 [2]

    (164207) 2004 GU9 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It will be a quasi-satellite of Earth until around 2600. [4]

    Contents

    On 14 April 2004 (with less than a 1-day observation arc), the Sentry Risk Table showed 180 virtual impactors. [5] It was removed from the Sentry Risk Table 2 days later on 16 April 2004. [6] (164207) 2004 GU9 now has a well determined orbit with an observation arc of 12 years.

    Discovery and naming

    This asteroid was discovered on 13 April 2004 by the Lincoln Near-Earth Asteroid Research project near Socorro, New Mexico and given the provisional designation 2004 GU9. [1] Following the naming of 524522 Zoozve, a quasi-satellite of Venus, Radiolab and the International Astronomical Union will hold a public naming campaign for this quasi-satellite from June to September 2024. The selected name will be announced in January 2025. [7] [8]

    Animation of (164207) 2004 GU9's orbit from 1600 to 2500
    Animation of 2004 GU9's orbit relative to Sun and Earth.gif
    Relative to Sun and Earth
    Animation of 2004 GU9's orbit around Earth.gif
    Around Earth
    Animation of 2004 GU9's orbit around Sun.gif
    Around Sun
       Sun ·   Earth ·  2004 GU9

    See also

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    References

    1. 1 2 "(164207) = 2004 GU9". Minor Planet Center. Retrieved 3 June 2024.
    2. 1 2 "(164207) 2004 GU9". JPL Small-Body Database . Jet Propulsion Laboratory. SPK-ID:  2164207 . Retrieved 7 April 2016.
    3. "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001.
    4. Wajer, Paweł (October 2010). "Dynamical evolution of Earth's quasi-satellites: 2004 GU9 and 2006 FV35". Icarus . 209 (2): 488–493. Bibcode:2010Icar..209..488W. doi:10.1016/j.icarus.2010.05.012.
    5. "Major News about Minor Objects: Risk monitoring". hohmanntransfer. 14 April 2004. Archived from the original on 6 November 2020. Retrieved 2 March 2015.
    6. "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Archived from the original on 2 June 2002. Retrieved 1 March 2015.
    7. "Competition Announced to Name a Quasi-Moon". IAU. 31 May 2024. Retrieved 3 June 2024.
    8. "OFFICIAL RULES: Name a Quasi Moon!". Radiolab . Retrieved 3 June 2024. Radiolab is partnering with the International Astronomical Union to launch a months-long global naming contest for one of Earth's quasi-moons (asteroid 164207).