(501546) 2014 JJ80, prov. 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 350 kilometers (220 miles) in diameter.
| Discovery[1] | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery site | Haleakalā Obs. |
| Discovery date | 9 July 2013 |
| Designations | |
MPC designation | (501546) 2014 JJ80 |
Alternative designations | 2014 JJ80 |
Minor planet category | TNO[2] · other[3] p-DP[4] · distant[1] |
| Orbital characteristics[2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 6.92 yr (2,526 d) |
| Aphelion | 55.066 AU |
| Perihelion | 31.297 AU |
Semi-major axis | 43.182 AU |
| Eccentricity | 0.2752 |
Orbital period (sidereal) | 283.76 yr (103,645 d) |
Mean anomaly | 342.32° |
Mean motion | 0° 0m 12.6s / day |
| Inclination | 18.674° |
Longitude of ascending node | 261.43° |
Time of perihelion | ≈ 18 July 2033[5] |
Argument of perihelion | 97.702° |
| Physical characteristics | |
Mean diameter | 344 km (est.)[4] 352 km (est.)[3] |
Geometric albedo | 0.08 (assumed)[4] 0.09 (assumed)[3] |
Absolute magnitude (H) | 5.5[1][2] |
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]
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 2021, it has not been named.[1]
According to American astronomer Michael Brown and the Johnston's archive, 2014 JJ80 measures 344 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 2021, 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]
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