en (471288) 2011 GM27

(471288) 2011 GM₂₇
Discovery
Discovery site	La Silla Obs. (809)
Discovery date	2 April 2011
Designations
MPC designation	(471288) 2011 GM27
Minor planet category	TNO · cubewano
Orbital characteristics
	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
Semi-major axis	43.500 AU
Eccentricity	0.0261
Orbital period (sidereal)	286.91 yr (104,794 d)
Mean anomaly	98.325°
Mean motion	0° 0m 12.24s / day
Inclination	13.028°
Longitude of ascending node	257.25°
Argument of perihelion	194.69°
Physical characteristics
Mean diameter	443 km (est.); 460 km (est.)
Geometric albedo	0.06 (est.); 0.09 (est.)
Absolute magnitude (H)	5.32

(471288) 2011 GM₂₇ (provisional designation 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]

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

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

External links

(471288) 2011 GM27 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters
(471288) 2011 GM27 at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info

This article about a centaur (minor planet) or trans-Neptunian object is a stub. You can help Wikipedia by expanding it.

[MPC-object-1] "471288 (2011 GM27)". Minor Planet Center. Retrieved 18 July 2021.

[johnstonsarchive-2] Johnston, Wm. Robert (18 August 2020). "Asteroids with Satellites Database – (508869) 2002 VT130". Johnston's Archive. Retrieved 18 July 2021.

[jpldata-3] "JPL Small-Body Database Browser: 471288 (2011 GM27)" (2020-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 18 July 2021.

[Brown-dplist-4] Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 18 July 2021.

[precovery-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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