2013 FQ28

Detached object in the scattered disc December 2018 yes #C2E0FF 2013 FQ 28 2013 FQ28-orbit.png Orbit of 2013 FQ 28 CTIO CTIO(first observed only) 17 March 2013 2013 FQ 28 TNO detached SDO distant 27 April 2019 (JD 2458600.5) 7 5 2.09 yr (764 d) 80.096 AU 45.801 AU 62.948 AU 0.2724 499.44 yr (182,422 d) 92.132° 0.0020 ms / day 25.705° 214.89° 229.51° 250 km 266 km 280 km 0.08 (assumed) 0.09 (assumed) 0.10 (assumed) 24.49 6.0 2013 FQ 28 is a trans-Neptunian object, considered both a scattered and detached object, located in the outermost region of the Solar System. It was first observed on 17 March 2013, by a team of astronomers at the Cerro Tololo Inter-American Observatory in Chile. It orbits the Sun in a moderate inclined, moderate-eccentricity orbit. The weak dwarf planet candidate measures approximately 260 km mi off 2 us in diameter. Orbit and classification thumb|left|200px|2013 FQ 28 is located near the "gap", a poorly understood region. 2013 FQ 28 orbits the Sun at a distance of 45.8–80.1 AU once every 499 years and 5 months (182,422 days; semi-major axis of 62.95 AU). Its orbit has an eccentricity of 0.27 and an inclination of 26° with respect to the ecliptic. With an orbital period of 499 years, and similar to 2015 FJ 345, it seems to be a resonant trans-Neptunian objects in a 1:3 resonance with Neptune,12 as several other objects, but with a lower eccentricity (0.27 instead of more than 0.60) and a higher perihelia (at 45.8 AU rather than 31–41 AU). Considered both a scattered and detached object, 2013 FQ 28 is particularly unusual as it has a relatively circular orbit for a scattered-disc object (SDO). Although it is thought that typical SDOs have been ejected into their current orbits by gravitational interactions with Neptune, the low eccentricity of its orbit and the distance of its perihelion (SDOs generally have highly eccentric orbits and perihelia less than 38 AU) seems hard to reconcile with such celestial mechanics. This has led to some uncertainty as to the current theoretical understanding of the outer Solar System. The theories include close stellar passages, unseen planet/rogue planets/planetary embryos in the early Kuiper belt, and resonance interaction with an outward-migrating Neptune. The Kozai mechanism is capable of transferring orbital eccentricity to a higher inclination. Physical characteristics A survey for objects beyond the Kuiper Cliff by Scott Sheppard, Chadwick Trujillo and David Tholen gives a diameter of 250 kilometers assuming a moderate albedo of 0.10. 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 266 kilometers, using an estimated albedo of 0.08 and an absolute magnitude of 6.3. This is approximately half the size of 145480 2005 TB 190, which is estimated at 500 km mi, roughly a quarter the size of Pluto. 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. 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. References 30em 2015-04-20 last obs. JPL Small-Body Database Browser: (2013 FQ28) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3753793 Jet Propulsion Laboratory 13 December 2018 2013 FQ28 Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2013+FQ28 13 December 2018 List of Known Trans-Neptunian Objects Johnston's Archive 7 October 2018 Johnston Wm. Robert http://www.johnstonsarchive.net/astro/tnoslist.html 12 December 2018 How many dwarf planets are there in the outer solar system? California Institute of Technology Brown Michael E. http://web.gps.caltech.edu/~mbrown/dps.html 12 December 2018 Jewitt, David, Morbidelli, Alessandro, & Rauer, Heike. (2007). Trans-Neptunian Objects and Comets: Saas-Fee Advanced Course 35. Swiss Society for Astrophysics and Astronomy. Berlin: Springer. 3-540-71957-1. Patryk Sofia Lykawka Tadashi Mukai July 2007 Dynamical classification of trans-neptunian objects: Probing their origin, evolution, and interrelation http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007Icar..189..213L Icarus 189 1 213–232 2007Icar..189..213L 10.1016/j.icarus.2007.01.001 12 December 2018 R. L. Allen B. Gladman J. J. Kavelaars J.-M. Petit J. W. Parker P. Nicholson March 2006 Discovery of a Low-Eccentricity, High-Inclination Kuiper Belt Object at 58 AU The Astrophysical Journal 640 1 L83–L86 2006ApJ...640L..83A 10.1086/503098 astro-ph/0512430 15588453 (Discovery paper) Scott S. Sheppard Chadwick Trujillo David J. Tholen July 2016 Beyond the Kuiper Belt Edge: New High Perihelion Trans-Neptunian Objects with Moderate Semimajor Axes and Eccentricities The Astrophysical Journal Letters 825 1 7 2016ApJ...825L..13S 10.3847/2041-8205/825/1/L13 1606.02294 118630570 free 2013 FQ28 – Ephemerides AstDyS-2, Asteroids Dynamic Site, Department of Mathematics, University of Pisa, Italy https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=2013FQ28 12 December 2018 External links List Of Centaurs and Scattered-Disk Objects, Minor Planet Center Discovery Circumstances: Numbered Minor Planets (1)–(5000) Minor Planet Center List of Known Trans-Neptunian Objects, Johnston's Archive 2013FQ28 3753793 # Category:Minor planet object articles (unnumbered) # 20130317 Category:Trans-Neptunian objects in a 1:3 resonance