(60621) 2000 FE8 (provisional designation 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]
 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 | |
| (60621) 2000 FE8 | |
| 2000 FE8 | |
| 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 |
| 55.888 AU | |
| Eccentricity | 0.4062 |
| 417.81 yr (152,607 days) | |
| 30.201° | |
| 0° 0m 8.64s / day | |
| Inclination | 5.8614° |
| 3.8785° | |
| 144.17° | |
| Known satellites | 1, S/2007 (60621) 1[4] |
| Physical characteristics | |
| 146 km (primary)[4] 111 km (secondary)[4] | |
Mean density | 1 g/cm3[4] |
| 0.09[4] | |
| (yellow-orange) B−V=0.75; V−R=0.48[5] | |
| 6.9[1] | |
Orbit
edit2000 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
edit2000 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
editLike 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
editThis 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
edit- ^ a b c d e "JPL Small-Body Database Browser: 60621 (2000 FE8)" (2007-01-15 last obs.). Jet Propulsion Laboratory. Retrieved 28 May 2017.
- ^ a b "60621 (2000 FE8)". Minor Planet Center. Retrieved 24 February 2018.
- ^ a b c Johnston, W. R. (5 July 2013). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 5 October 2013.
- ^ a b c d e f g Johnston, W. R. (26 November 2008). "(60621) 200 FE8". Johnston's Archive. Retrieved 1 October 2013.
- ^ Tegler, S. C.; et al. (2003). "Color patterns in the Kuiper belt: a possible primordial origin" (PDF). Astrophysical Journal. 599 (1): L49–L52. Bibcode:2003ApJ...599L..49T. doi:10.1086/381076. S2CID 119835895. Archived from the original (PDF) on 22 September 2017. Retrieved 4 November 2018.
- ^ Orbit and Astrometry for 60621
- ^ Green, Daniel (3 March 2007). "Circular No. 8816" (PDF). Harvard. Retrieved 5 October 2013.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
External links
edit- 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