(501546) 2014 JJ80

(501546) 2014 JJ80, provisional designation 2014 JJ80, is a trans-Neptunian object from the outermost region of the Solar System. It was discovered on 9 July 2013, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.[1] It is a dwarf planet candidate, as it measures approximately 340 kilometers (210 miles) in diameter.

(501546) 2014 JJ80
Discovery [1]
Discovered byPan-STARRS 1
Discovery siteHaleakalā Obs.
Discovery date9 July 2013
Designations
(501546) 2014 JJ80
2014 JJ80
TNO [2] · other [3]
p-DP [4] · distant [1]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2
Observation arc6.92 yr (2,526 d)
Aphelion55.066 AU
Perihelion31.297 AU
43.182 AU
Eccentricity0.2752
283.76 yr (103,645 d)
342.32°
0° 0m 12.6s / day
Inclination18.674°
261.43°
≈ 18 July 2033[5]
97.702°
Physical characteristics
Mean diameter
329 km (est.)[4]
352 km (est.)[3]
0.08 (assumed)[4]
0.09 (assumed)[3]
5.5[1][2]

    Orbit and classification

    2014 JJ80 orbits the Sun at a distance of 31.3–55.1 AU once every 283 years and 9 months (103,645 days; semi-major axis of 43.18 AU). Its orbit has an eccentricity of 0.28 and an inclination of 19° with respect to the ecliptic.[2] The body's observation arc begins at Haleakalā with a precovery taken in August 2010, nearly 3 years prior to its official discovery observation.[1]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 5 October 2017 and received the number 501546 in the minor planet catalog (M.P.C. 106396).[6] As of 2018, it has not been named.[1]

    Physical characteristics

    According to American astronomer Michael Brown and the Johnston's archive, 2014 JJ80 measures 329 and 352 kilometers in diameter based on an assumed albedo of 0.08 and 0.09, respectively.[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][7]

    References
    1. "501546 (2014 JJ80)". Minor Planet Center. Retrieved 3 December 2018.
    2. "JPL Small-Body Database Browser: 501546 (2014 JJ80)" (2017-07-19 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. 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 3 December 2018.
    7. "LCDB Data for (501546)". Asteroid Lightcurve Database (LCDB). Retrieved 3 December 2018.

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