2014 FE72

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2014 FE72
Planet nine-etnos now.png
Orbits of 2014 FE72 (green) and other scattered/detached objects, along with hypothetical Planet Nine on the right
Discovery [1]
Discovered by Scott Sheppard
Chad Trujillo
Discovery date 26 March 2014
MPC designation 2014 FE72
Orbital characteristics[2]
Epoch 2017-Sep-04 (JD 2458000.5)
Uncertainty parameter 5
Observation arc 1.7 years (623 days)
Aphelion 3800±4200 AU
3220 AU (barycentric)[3]
Perihelion 36.34±0.36 AU
1900±2100 AU
1630 AU (barycentric)[3]
Eccentricity 0.981±0.02
85000±140000 yr
66000 yr (barycentric solution)[3]
0° 0m 0.041s ± 0° 0m 0.045s/ day
Inclination 20.615±0.007°
Physical characteristics
Dimensions 270 km (est. at 0.08)[4][5]
0.08 (assumed)[4]

2014 FE72 is a trans-Neptunian object first observed on 26 March 2014, at Cerro Tololo Observatory, La Serena. It is a possible dwarf planet,[4] a member of the scattered disc, whose orbit extends into the inner Oort cloud.[1] Discovered by Scott Sheppard and Chad Trujillo, the object's existence was revealed on 29 August 2016.[1][6] Both the orbital period and aphelion distance of this object are poorly constrained.[2]


Its elongated orbit (eccentricity = 0.98) has a perihelion of 36.3 AU, an aphelion of ~3,200 AU and an orbital period of ~66,000 years.[3] The latter values are the largest known for any Solar System body that is not a long-period comet.[n 1] It takes roughly 5 times longer than Sedna to orbit the Sun. The epoch of October 2021 will be when 2014 FE72 will have its smallest heliocentric aphelion of 2632 AU.[clarification needed]

2014 FE72 last passed through perihelion around late 1965.[2] In 2018, it moves from 62.0 AU to 62.7 AU (±30 million km) from the Sun.[8] It comes to opposition at the end of March in the constellation of Corvus.

2014 FE72 is seen at the top here in green, moving away from the sun.

Comparison with other objects[edit]

See also[edit]


  1. ^ 2017 MB7, an apparently much smaller object (absolute magnitude ~14) which might be an extinct comet, has a similar barycentric aphelion of ~2,800 AU and an orbital period of ~54,000 years.[7]


  1. ^ a b c d Williams, G. V. (29 August 2016). "MPEC 2016-Q43 : 2014 FE72". Minor Planet Center. Retrieved 2016-08-31. 
  2. ^ a b c d "JPL Small-Body Database Browser: (2014 FE72)" (2015-12-09 last obs). Jet Propulsion Lab. Archived from the original on 26 Oct 2016. Retrieved 8 February 2017. 
  3. ^ a b c d Horizons output. "Barycentric Osculating Orbital Elements for 2014 FE72". Retrieved 2017-02-08.  (Ephemeris Type:Elements and Center:@0)
  4. ^ a b c Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2016-09-15. 
  5. ^ "Absolute magnitude (H)". Near Earth Object Program. NASA/Jet Propulsion Lab. Retrieved 2016-09-15. 
  6. ^ "Hunt for ninth planet reveals new extremely distant Solar System objects". CarnegieScience.edu. Carnegie Institution. 29 August 2016. Retrieved 2016-08-31. 
  7. ^ JPL Small-Body Database Browser: (2017 MB7)
  8. ^ "AstDyS 2014FE72 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2017-02-14.  (Distance to Sun [R] from 2016 to 2020.)
  9. ^ a b "AstDyS-2, Asteroids - Dynamic Site". Retrieved 2018-04-03. Objects with distance from Sun over 59 AU 
  10. ^ Astronomer Michele Bannister (29 Mar 2018)

External links[edit]