(523706) 2014 HF200

(523706) 2014 HF200, provisional designation 2014 HF200, is a trans-Neptunian object on an eccentric orbit from the scattered disc, located in the outermost region of the Solar System. It was discovered on 20 May 2012, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.[1] The dwarf planet candidate measures approximately 300 kilometers (190 miles) in diameter.

(523706) 2014 HF200
Discovery [1]
Discovered byPan-STARRS 1
Discovery siteHaleakalā Obs.
Discovery date20 May 2012
Designations
(523706) 2014 HF200
2014 HF200
TNO [2] · SDO [3]
p-DP [4] · distant [1]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2 · 1[1]
Observation arc7.11 yr (2,596 d)
Aphelion88.039 AU
Perihelion35.479 AU
61.759 AU
Eccentricity0.4255
485.36 yr (177,277 d)
348.48°
0° 0m 7.2s / day
Inclination9.7100°
21.497°
≈ 27 March 2035[5]
±2 days
253.41°
Physical characteristics
Mean diameter
293 km (est.)[3]
302 km (est.)[4]
0.08 (assumed)[4]
0.09 (assumed)[3]
5.9[1][2]

    Orbit and classification

    2014 HF200 is a scattered disc object and orbits the Sun at a distance of 35.5–88.0 AU once every 485 years and 4 months (177,277 days; semi-major axis of 61.76 AU). Its orbit has an eccentricity of 0.43 and an inclination of 10° with respect to the ecliptic.[2]

    The body's observation arc begins with a precovery taken by Pan-STARRS in May 2010, two years prior to its official discovery observation.[1] It still has a small orbital uncertainty of 1 and 2, respectively.[1][2]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 25 September 2018 and received the number 523706 in the minor planet catalog (M.P.C. 111779).[6] As of 2018, it has not been named.[1]

    Physical characteristics

    According to the Johnston's archive and American astronomer Michael Brown, 2014 HF200 measures 293 and 302 kilometers in diameter based on an assumed albedo of 0.09 and 0.08, respectively.[3][4] On his website, Michael 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][7]

    References
    1. "523706 (2014 HF200)". Minor Planet Center. Retrieved 30 November 2018.
    2. "JPL Small-Body Database Browser: 523706 (2014 HF200)" (2017-06-26 last obs.). Jet Propulsion Laboratory. Retrieved 30 November 2018.
    3. Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 29 November 2018.
    4. Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 29 November 2018.
    5. JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
    6. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 November 2018.
    7. "LCDB Data for (523706)". Asteroid Lightcurve Database (LCDB). Retrieved 30 November 2018.

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