Astronomy:2010 TJ

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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
Minor planet categoryTNO[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)
|{{{apsis}}}|helion}}84.870 AU
|{{{apsis}}}|helion}}39.894 AU
62.382 AU
Eccentricity0.3605
Orbital period492.72 yr (179,965 d)
Mean anomaly12.366°
Mean motion0° 0m 7.2s / day
Inclination38.931°
Longitude of ascending node91.226°
273.70°
Physical characteristics
Mean diameter443 km (estimated)[3]
471 km (assumed)[5]
Geometric albedo0.07 (assumed)[5]
0.09 (assumed)[3]
Absolute magnitude (H)5.0[1] · 5.3[5]


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]

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

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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: (2010 TJ)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3547935. 
  2. ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. https://www.minorplanetcenter.net/iau/lists/t_centaurs.html. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Johnston, Wm. Robert (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. 
  4. ↑ 4.0 4.1 4.2 4.3 "2010 TJ". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2010+TJ. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. http://web.gps.caltech.edu/~mbrown/dps.html. 
  6. ↑ "LCDB Data for (2010 TJ)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=0%7C2010+TJ. 

External links



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