2014 UE228
Discovery[1][2]
Discovered byOSSOS
Discovery siteMauna Kea Obs.
Discovery date22 October 2014
Designations
2014 UE228
TNO[3] · res (3:8)[4][5]
Orbital characteristics[3]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 2[2] · 3[3]
Observation arc4.06 yr (1,482 d)
Aphelion81.589 AU
Perihelion34.713 AU
58.151 AU
Eccentricity0.4031
443.45 yr (161,970 d)
341.58°
0° 0m 7.92s / day
Inclination8.8011°
232.58°
209.98°
Physical characteristics
Mean diameter
93 km (est. at 0.09)[4][6]
24.44[7]
8.4[2][3]

    2014 UE228 is a trans-Neptunian object from the outermost region of the Solar System. The object is in a rare 3:8 resonance with Neptune and measures approximately 93 kilometers (58 miles) in diameter. It was first observed on 22 October 2014, by astronomers with the Outer Solar System Origins Survey at the Mauna Kea Observatories, Hawaii, and was provisionally designated 2014 UE228. As of 2021, it has not been numbered.[2]

    Orbit and classification

    2014 UE228 orbits the Sun at a distance of 34.7–81.6 AU once every 443 years and 5 months (161,970 days; semi-major axis of 58.15 AU). Its orbit has an eccentricity of 0.40 and an inclination of 9° with respect to the ecliptic.[3] The body's observation arc begins at Mauna Kea on 9 August 2013, more than a year prior to its official discovery observation on 22 October 2014.[1][2] As of 2021, the object is about 37.8 AU from the Sun, with an apparent magnitude of 24.44,[7] and will come to perihelion in 2044.[3][8]

    2014 UE228 is a resonant trans-Neptunian object that stays in a rare 3:8 mean-motion orbital resonance with Neptune, orbiting exactly three times the Sun for every 8 orbits Neptune does.[5] There are currently two other objects known to have the same resonant type: (82075) 2000 YW134 and (542258) 2013 AP183.[4][9] Long-term numerical integrations of the object's orbit by the Deep Ecliptic Survey shows a minimum perihelion distance of 34 AU. The classification is deemed secure.[5]

    Numbering and naming

    This minor planet has neither been numbered nor named.[2] According to the established naming conventions, it will be given a mythological name associated with the underworld.[10]

    Physical characteristics

    Based on a generic magnitude-to-diameter conversion, 2014 UE228 measures approximately 93 kilometers (58 miles) in diameter, for an assumed albedo of 0.9 and an absolute magnitude of 8.4.[4][6] As of 2021, no rotational lightcurve for this object has been obtained from photometric observations. The body's rotation period and pole as well as its albedo and surface composition remain unknown.[3]

    References

    1. 1 2 "MPEC 2017-X21 : 2014 UE228". Minor Planet Electronic Circular. Minor Planet Center. 7 December 2017. Retrieved 9 September 2021.
    2. 1 2 3 4 5 6 "2014 UE228". Minor Planet Center. Retrieved 9 September 2021.
    3. 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: (2014 UE228)" (2017-08-30 last obs.). Jet Propulsion Laboratory. Retrieved 9 September 2021.
    4. 1 2 3 4 "List of Known Trans-Neptunian Objects". Johnston's Archive. 18 August 2020. Retrieved 9 September 2021.
    5. 1 2 3 "Orbit Fit and Astrometric record for 14UE228". Southwest Research Institute. Retrieved 9 September 2021. (The Deep Ecliptic Survey Object Classifications)
    6. 1 2 "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 9 September 2021.
    7. 1 2 "Asteroid 2014 UE228 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 9 September 2021.
    8. ↑ "Horizon Online Ephemeris System". California Institute of Technology, Jet Propulsion Laboratory. Retrieved 8 September 2021.
    9. ↑ "The Deep Ecliptic Survey Object Classifications". Southwest Research Institute. Retrieved 9 September 2021.
    10. ↑ "Naming of Astronomical Objects – Minor planets". IAU – International Astronomical Union. Retrieved 9 September 2021.
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