2014 AN55

2014 AN55
Discovery [1]
Discovered by Pan-STARRS 1
Discovery site Haleakala Obs.
Discovery date 5 January 2014
(first observed only)
Designations
MPC designation 2014 AN55
TNO [2] · SDO [3]
distant [1] · p-DP [4]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 3
Observation arc 10.24 yr (3,741 days)
Aphelion 78.400 AU
Perihelion 34.389 AU
56.395 AU
Eccentricity 0.3902
423.51 yr (154,688 d)
316.10°
0° 0m 8.28s / day
Inclination 9.4261°
283.88°
306.82°
Physical characteristics
Dimensions 584 km (calculated)[4]
671 km (calculated)[3]
0.09 (assumed)[3]
0.10 (assumed)[4]
4.1[2] · 4.4[4]

    2014 AN55 is a trans-Neptunian object and a dwarf-planet candidate from the scattered disc, located the outermost region of the Solar System, approximately 600 kilometres (370 mi) in diameter. It was first observed on 5 January 2014, by astronomers of the Pan-STARRS survey at Haleakala Observatory on the island of Maui, Hawaii, in the United States.[1]

    Orbit and classification

    2014 AN55 belongs to the gravitationally perturbed population of scattered disc objects,[3] which, at their closest approaches, come close to Neptune's orbit at 30 AU, but their farthest distances reach many times of that.

    It orbits the Sun at a distance of 34.4–78.4 AU once every 423 years and 6 months (154,688 days; semi-major axis of 56.4 AU). Its orbit an eccentricity of 0.39 and an inclination of 9° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken by the Sloan Digital Sky Survey in March 2005.[1]

    Physical characteristics

    Diameter and albedo

    According to American astronomer Michael Brown, 2014 AN55 is a likely dwarf planet. He estimates a diameter of 584 kilometers, based on an absolute magnitude of 4.4 and an assumed albedo of 0.10.[4] The Johnstons's Archive assumes an albedo of 0.09 and calculates a diameter of 671 kilometers.[3]

    Numbering and naming

    This minor planet has neither been numbered nor named.[1]

    References

    1. 1 2 3 4 5 "2014 AN55". Minor Planet Center. Retrieved 16 February 2018.
    2. 1 2 3 4 "JPL Small-Body Database Browser: (2014 AN55)" (2015-06-09 last obs.). Jet Propulsion Laboratory. Retrieved 16 February 2018.
    3. 1 2 3 4 5 Johnston, Wm. Robert (30 December 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 16 February 2018.
    4. 1 2 3 4 5 Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 16 February 2018.

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