| Discovery[1] | |
|---|---|
| Discovered by | Pan-STARRS1 |
| Discovery site | Haleakalā Obs. |
| Discovery date | 30 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 parameter2 | |
| Observation arc | 8.01 yr (2,924 d) |
| Aphelion | 55.196 AU |
| Perihelion | 38.080 AU |
| 46.638 AU | |
| Eccentricity | 0.1835 |
| 318.51 yr (116,334 d) | |
| 27.659° | |
| 0° 0m 11.16s / day | |
| Inclination | 15.445° |
| 222.71° | |
| 341.39° | |
| Physical characteristics | |
| 280 km (est.)[3] 302 km (est.)[4] | |
| 0.08 (assumed)[4] 0.09 (assumed)[3] | |
| 6.0[1][2] | |
(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.
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 precoveryatHaleakala Observatory in May 2010, or eight months prior to its official discovery observation.[1]
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 523585to523800). 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]
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]
