(471288) 2011 GM27

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(471288) 2011 GM27
Discovery [1]
Discovery site La Silla Obs. (809)
Discovery date2 April 2011
Designations
(471288) 2011 GM27
TNO  · res 4:7? [2]
Orbital characteristics [3]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 2
Observation arc 14.08 yr (5,141 d)
Aphelion 44.638 AU
Perihelion 42.363 AU
43.500 AU
Eccentricity 0.0261
286.91 yr (104,794 d)
98.325°
0° 0m 12.24s / day
Inclination 13.028°
257.25°
194.69°
Physical characteristics
443  km (est.) [2]
460 km(est.) [4]
0.06 (est.) [4]
0.09 (est.) [2]
5.32 [3]

    (471288) 2011 GM27 (provisional designation 2011 GM27) is a resonant trans-Neptunian object (TNO) in the Kuiper belt. [2] It was discovered on 2 April 2011, at ESO's La Silla Observatory in Chile. [1] With an absolute magnitude of 5.32, [3] a geometric albedo of between 0.06 and 0.09 (a typical value) would mean it has a diameter of about 450 kilometers (280 mi). [2]

    2011 GM27 orbits the Sun at a distance of 42.4–44.6  AU once every 286 years and 11 months (104,794 days; semi-major axis of 43.5 AU). Its orbit has an eccentricity of 0.03 and an inclination of 13° with respect to the ecliptic. [3]

    It orbits slightly outside a 3:5 resonance with Neptune, taking 16 years (5.5% of its orbit) longer to orbit the Sun than a body in 3:5 resonance. Precovery observations exist dating back to 2006 in SDSS data. [5]

    References

    1. 1 2 "471288 (2011 GM27)". Minor Planet Center. Retrieved 18 July 2021.
    2. 1 2 3 4 5 Johnston, Wm. Robert (18 August 2020). "Asteroids with Satellites Database – (508869) 2002 VT130". Johnston's Archive. Retrieved 18 July 2021.
    3. 1 2 3 4 "JPL Small-Body Database Browser: 471288 (2011 GM27)" (2020-02-04 last obs.). Jet Propulsion Laboratory . Retrieved 18 July 2021.
    4. 1 2 Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology . Retrieved 18 July 2021.
    5. ↑ "On the discovery and precovery of Trans-Neptunian Objects from SDSS images". talk.galaxyzoo.org. pp. 1–2. Retrieved 8 March 2015.


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