2010 TJ

2010 TJ is a trans-Neptunian object from the scattered disc in the outermost region of the Solar System and measures approximately 460 kilometers in diameter. It was first observed by American astronomers David Rabinowitz, Megan Schwamb, and Suzanne Tourtellotte at ESO's La Silla Observatory in northern Chile on 2 October 2010.[4]

2010 TJ
Discovery[1][2]
Discovered byD. L. Rabinowitz
M. E. Schwamb
S. Tourtellotte
Discovery siteLa Silla Obs.
Discovery date2 October 2010
(first observed only)
Designations
2010 TJ
TNO[1] · SDO[3]
distant[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 4
Observation arc7.22 yr (2,636 days)
Aphelion84.870 AU
Perihelion39.894 AU
62.382 AU
Eccentricity0.3605
492.72 yr (179,965 d)
12.366°
0° 0m 7.2s / day
Inclination38.931°
91.226°
273.70°
Physical characteristics
Mean diameter
443 km (estimated)[3]
471 km (assumed)[5]
0.07 (assumed)[5]
0.09 (assumed)[3]
5.0[1] · 5.3[5]

    Orbit and classification

    2010 TJ is a probably a dwarf planet, based on Michael Brown's classification.[5] Typical for scattered disc objects,[3] it has an elliptical and inclined orbit: the object orbits the Sun at a distance of 39.9–84.9 AU once every 492 years and 9 months (179,965 days; semi-major axis of 62.4 AU). Its orbit has an eccentricity of 0.36 and an inclination of 39° with respect to the ecliptic.[1] The body's observation arc begins with its first observation at La Silla in October 2010.[4]

    Physical characteristics
    Artist's rendering of 2010 TJ

    2010 TJ's color and taxonomic type have not yet been determined.[1][3]

    Rotation period

    As of 2018, no rotational lightcurve of 2010 TJ has been obtained from photometric observations. The object's rotation period, shape and poles remain unknown.[6]

    Diameter and albedo

    According to the Johnston's Archive and Michael Brown, 2010 TJ measures 443 and 471 kilometers in diameter, and its surface has an assumed albedo of 0.09 and 0.07, respectively.[3][5]

    Numbering and naming

    This minor planet has neither been numbered nor named.[4]

    References
    1. "JPL Small-Body Database Browser: (2010 TJ)" (2017-12-20 last obs.). Jet Propulsion Laboratory. Retrieved 17 January 2018.
    2. "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 17 January 2018.
    3. Johnston, Wm. Robert (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 17 January 2018.
    4. "2010 TJ". Minor Planet Center. Retrieved 17 January 2018.
    5. Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 17 January 2018.
    6. "LCDB Data for (2010 TJ)". Asteroid Lightcurve Database (LCDB). Retrieved 17 January 2018.

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