(523702) 2014 HW199

(523702) 2014 HW199, provisional designation 2014 HW199, is a trans-Neptunian object from the classical Kuiper belt, located in the outermost region of the Solar System. It was discovered on 30 January 2011, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.[1] The classical Kuiper belt object is also a dwarf planet candidate, as it measures approximately 290 kilometers (180 miles) in diameter.

(523702) 2014 HW199
Discovery[1]
Discovered byPan-STARRS 1
Discovery siteHaleakalā Obs.
Discovery date30 January 2011
Designations
(523702) 2014 HW199
2014 HW199
TNO[2] · cubewano[3]
p-DP[4] · distant[1]
Orbital characteristics[2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2
Observation arc8.01 yr (2,924 d)
Aphelion55.196 AU
Perihelion38.080 AU
46.638 AU
Eccentricity0.1835
318.51 yr (116,334 d)
27.659°
0° 0m 11.16s / day
Inclination15.445°
222.71°
341.39°
Physical characteristics
Mean diameter
280 km (est.)[3]
302 km (est.)[4]
0.08 (assumed)[4]
0.09 (assumed)[3]
6.0[1][2]

    Orbit and classification

    2014 HW199 is a cubewano from the classical Kuiper belt.[3] It is located in between the resonant plutino and twotino populations and has a low-eccentricity orbit. With an inclination significantly higher than 4–7°, it belongs to the "stirred" hot population rather than to the cold population with lower inclinations.

    It orbits the Sun at a distance of 38.1–55.2 AU once every 318 years and 6 months (116,334 days; semi-major axis of 46.64 AU). Its orbit has an eccentricity of 0.18 and an inclination of 15° with respect to the ecliptic.[2] The body's observation arc begins with a precovery at Haleakala Observatory in May 2010, or eight months prior to its official discovery observation.[1]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 25 September 2018, together with hundreds of other centaurs, trans-Neptunian and near-Earth objects (see catalog entries from 523585 to 523800). This object received the number 523702 in the minor planet catalog (M.P.C. 111779).[5] As of 2018, it has not been named.[1]

    Physical characteristics

    Johnston's archive estimates a diameter of 280 kilometers based on an assumed albedo of 0.09, while American astronomer Michael Brown, calculates a diameter of 302 kilometers, using an estimated albedo of 0.08 and an absolute magnitude of 6.0.[3][4]

    On his website, Brown lists this object as a "possible" dwarf planet (200–400 km), which is the category with the lowest certainty in his 5-class taxonomic system.[4] As of 2018, no spectral type and color indices, nor a rotational lightcurve have been obtained from spectroscopic and photometric observations. The body's color, rotation period, pole and shape remain unknown.[2][6]

    References
    1. "523702 (2014 HW199)". Minor Planet Center. Retrieved 3 December 2018.
    2. "JPL Small-Body Database Browser: 523702 (2014 HW199)" (2018-05-20 last obs.). Jet Propulsion Laboratory. Retrieved 3 December 2018.
    3. Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 3 December 2018.
    4. Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 3 December 2018.
    5. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 December 2018.
    6. "LCDB Data for (523702)". Asteroid Lightcurve Database (LCDB). Retrieved 3 December 2018.

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