(91205) 1998 US43

(91205) 1998 US43
Discovery [1]
Discovered by M. W. Buie
Discovery site Kitt Peak National Obs.
Discovery date 22 October 1998
Designations
MPC designation (91205) 1998 US43
1998 US43
TNO [1] · plutino [2]
distant [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 4
Observation arc 17.29 yr (6,314 days)
Aphelion 44.214 AU
Perihelion 34.039 AU
39.127 AU
Eccentricity 0.1300
244.75 yr (89,394 d)
63.199°
0° 0m 14.4s / day
Inclination 10.629°
223.95°
139.70°
Physical characteristics
Dimensions 111 km (estimate)[2]
0.09 (assumed)[2]
BB-BR [2]
8.0[1]

    (91205) 1998 US43, is a resonant trans-Neptunian object from the Kuiper belt located in the outermost region of the Solar System. The rather bluish body measures approximately 111 kilometers in diameter.[2] It was discovered on 22 October 1998, by American astronomer Marc Buie at the Kitt Peak National Observatory in the United States.[3]

    Classification and orbit

    1998 US43 is classified as a plutino,[2] so it has a 2:3 resonance with Neptune, similar to Pluto.

    It orbits the Sun at a distance of 34.0–44.2 AU once every 244 years and 9 months (89,394 days). Its orbit has an eccentricity of 0.13 and an inclination of 11° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation. Its orbit still has a fair amount of uncertainty.[3]

    Physical characteristics

    1998 US43 it is unlikely to ever be classified as a dwarf planet due to its relatively small size.

    Based on an absolute magnitude of 8.0 and an assumed albedo of 0.09, the Johnston's Archive estimates a diameter of 111 kilometers.[2] The body's spectrum (BB-BR) suggests a somewhat bluish color.[2] As of 2017, no rotational lightcurve of 1998 US43 has been obtained from photometric observations.[4]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 28 October 2004.[5] As of 2018, it has not been named.[3]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 91205 (1998 US43)" (2016-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 13 October 2017.
    2. 1 2 3 4 5 6 7 8 "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 13 October 2017.
    3. 1 2 3 4 "91205 (1998 US43)". Minor Planet Center. Retrieved 13 October 2017.
    4. ↑ "LCDB Data for (91205)". Asteroid Lightcurve Database (LCDB). Retrieved 13 October 2017.
    5. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
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