(471288) 2011 GM27

(471288) 2011 GM27 is a trans-Neptunian object (TNO) in the Kuiper belt, classified as a hot classical Kuiper belt object.[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 to 0.09 (a typical value) would mean it has a diameter of about 450 kilometers (280 mi).[2]

(471288) 2011 GM27
Discovery[1]
Discovery siteLa Silla Obs. (809)
Discovery date2 April 2011
Designations
(471288) 2011 GM27
TNO · cubewano[2]
Orbital characteristics[3]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 2
Observation arc14.08 yr (5,141 d)
Aphelion44.638 AU
Perihelion42.363 AU
43.500 AU
Eccentricity0.0261
286.91 yr (104,794 d)
98.325°
0° 0m 12.24s / day
Inclination13.028°
257.25°
194.69°
Physical characteristics
Mean diameter
443 km (est.)[2]
460 km (est.)[4]
0.06 (est.)[4]
0.09 (est.)[2]
5.32[3]

    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. "471288 (2011 GM27)". Minor Planet Center. Retrieved 18 July 2021.
    2. Johnston, Wm. Robert (18 August 2020). "Asteroids with Satellites Database – (508869) 2002 VT130". Johnston's Archive. Retrieved 18 July 2021.
    3. "JPL Small-Body Database Browser: 471288 (2011 GM27)" (2020-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 18 July 2021.
    4. 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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