(184212) 2004 PB112

(184212) 2004 PB112, provisional designation 2004 PB112, is a resonant trans-Neptunian object from the scattered disc, with a semi-major axis of approximately 110 AU and in a rare orbital resonance ratio with Neptune. It was discovered on 13 August 2004, by American astronomer Marc Buie at the Cerro Tololo Inter-American Observatory in Chile.[2]

(184212) 2004 PB112
Discovery [1][2]
Discovered byM. W. Buie
Discovery siteCerro Tololo Obs.
Discovery date13 August 2004
Designations
(184212) 2004 PB112
2004 PB112
TNO [1] · SDO
4:27 resonance[3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3
Observation arc8.18 yr (2,986 days)
Aphelion177.38 AU
Perihelion35.329 AU
106.35 AU
Eccentricity0.6678
1096.82 yr (400,612 days)
1.9877°
0° 0m 3.24s / day
Inclination15.454°
356.81°
3.5097°
Physical characteristics
Dimensions100–220 km[4]
7.2[5] · 7.3[1]

    Orbit and classification

    2004 PB112 orbits the Sun at a distance of 35.3–177.4 AU once every 1096 years and 10 months (400,612 days). Its orbit has an eccentricity of 0.67 and an inclination of 15° with respect to the ecliptic.[1] A first precovery was taken at Cerro Tololo in 2000, extending the body's observation arc by 4 years prior to its official discovery observation.[2]

    2004 PB112 reached perihelion on 5 October 2011 (JD 2455839.806).[1] It is a 4:27 resonant trans-Neptunian object.[3]:49

    Physical characteristics

    Based on a generic conversion from an absolute magnitude of 7.2, 2004 PB112 measures between 100 and 220 kilometer in diameter.[4]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 20 April 2008.[6] As of 2018, it has not been named.[2]

    References
    1. "JPL Small-Body Database Browser: 184212 (2004 PB112)" (2008-10-30 last obs.). Jet Propulsion Laboratory. Retrieved 1 June 2017.
    2. "184212 (2004 PB112)". Minor Planet Center. Retrieved 24 April 2017.
    3. Brett Gladman; Brian G. Marsden; Christa VanLaerhoven. "Nomenclature in the Outer Solar System" (PDF) (PDF). Retrieved 24 April 2017.
    4. "Absolute Magnitudes (H) – generic diameter conversion". NASA/JPL. Retrieved 24 April 2017.
    5. "AstDys-2 (184212) 2004 PB112)". Retrieved 24 April 2017.
    6. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
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