astro.wikisort.org - Asteroid

(60621) 2000 FE₈ is a resonant and binary trans-Neptunian object, approximately 146 kilometers (91 miles) in diameter, located in the outermost region of the Solar System. It was discovered on 27 March 2000, by astronomers John Kavelaars, Brett Gladman, Jean-Marc Petit and Matthew Holman at Mauna Kea Observatory on Hawaii. This distant object resides in an eccentric orbit and is locked in a 2:5 orbital resonance with Neptune. It is known to have a 111-kilometer sized companion, which was discovered in January 2007.[3]

(60621) 2000 FE₈

Orbit of (60621) 2000 FE8
Discovery[1][2]
Discovered by	J. Kavelaars B. Gladman J.-M. Petit M. Holman
Discovery site	Mauna Kea Obs.
Discovery date	27 March 2000
Designations
MPC designation	(60621) 2000 FE8
Alternative designations	2000 FE8
Minor planet category	TNO[1] · res 2:5[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 4
Observation arc	6.80 yr (2,485 days)
Aphelion	78.590 AU
Perihelion	33.185 AU
Semi-major axis	55.888 AU
Eccentricity	0.4062
Orbital period (sidereal)	417.81 yr (152,607 days)
Mean anomaly	30.201°
Mean motion	0° 0m 8.64s / day
Inclination	5.8614°
Longitude of ascending node	3.8785°
Argument of perihelion	144.17°
Known satellites	1, S/2007 (60621) 1[4]
Physical characteristics
Mean diameter	146 km (primary)[4] 111 km (secondary)[4]
Mean density	1 g/cm3[4]
Geometric albedo	0.09[4]
Spectral type	(yellow-orange) B−V=0.75; V−R=0.48[5]
Absolute magnitude (H)	6.9[1]

Orbit

2000 FE₈ has an extremely eccentric orbit which crosses the paths of many other trans-Neptunian objects, including almost all of the dwarf planets and dwarf planet candidates. As a result, its position alternates between the Kuiper belt and the scattered disc.[1]

Resonance with Neptune

2000 FE₈ is part of a group of trans-Neptunian objects that orbit in a 2:5 resonance with Neptune.[6] That means that for every five orbits that Neptune completes, 2000 FE₈ makes only two.[3] Several other objects are in the same orbital resonance, the largest of which is (84522) 2002 TC302.

Satellite

Like many objects of the Kuiper belt and scattered disc, 2000 FE₈ has a satellite. Provisionally designated S/2007 (60621) 1, the satellite was discovered by the Hubble Space Telescope seven years after 2000 FE₈ itself was found.[7] The moon orbits at 1180 kilometres away from 2000 FE₈, completing one orbit in approximately 7 days.[4] It is thought to be 115 km[4] in diameter, just 75.7% the diameter of 2000 FE₈ itself.

Numbering

This minor planet was numbered by the Minor Planet Center on 14 June 2003.[8] As of 2021^[update], it has not been named.[2]

References

External links

• Canada-France Ecliptic Plane Survey (CFEPS)
• List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
• (60621) 2000 FE8 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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