astro.wikisort.org - Asteroid

(20161) 1996 TR₆₆ is a trans-Neptunian object orbiting beyond Pluto in the Kuiper belt of the outermost Solar System, approximately 139 kilometers (86 miles) in diameter. It was discovered on 8 October 1996, by astronomers David Jewitt, Chad Trujillo, Jane Luu, and Jun Chen at the Mauna Kea Observatory, Hawaii, in the United States.[4] It was the first discovery of a twotino.

(20161) 1996 TR₆₆

Discovery[1]
Discovered by	D. C. Jewitt C. Trujillo J. X. Luu J. Chen
Discovery site	Mauna Kea Obs.
Discovery date	8 October 1996
Designations
MPC designation	(20161) 1996 TR66
Minor planet category	TNO[1] · twotino[2][3] distant[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 4
Observation arc	12.04 yr (4,398 days)
Aphelion	66.612 AU
Perihelion	28.630 AU
Semi-major axis	47.621 AU
Eccentricity	0.3988
Orbital period (sidereal)	328.63 yr (120,032 d)
Mean anomaly	55.593°
Mean motion	0° 0m 10.8s / day
Inclination	12.436°
Longitude of ascending node	343.11°
Argument of perihelion	308.70°
Physical characteristics
Dimensions	139 km[5]
Absolute magnitude (H)	7.5[1]

Orbit and classification

It orbits the Sun at a distance of 28.6–66.6 AU once every 328 years and 8 months (120,032 days). Its orbit has an eccentricity of 0.40 and an inclination of 12° with respect to the ecliptic.[1] Near perihelion, it comes closer to the Sun than Neptune does (29.7 AU). It has a semi-major axis (average distance from the Sun) near the edge of the classical belt.

Twotino

1996 TR₆₆ was the first twotino discovered. Twotinos stay in a 1:2 orbital resonance with Neptune, which means that for every one orbit a twotino makes, Neptune orbits two times. Both the Minor Planet Center and the Deep Ecliptic Survey list this trans-Neptunian object as a twotino.[2][3]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 9 January 2001.[6] As of 2018, it has not been named.[4]

References

External links

• (20161) 1996 TR66 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• (20161) 1996 TR66 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[ru] (20161) 1996 TR66

(20161) 1996 TR66 — транснептуновый объект с орбитой, расположенной дальше Плутона, в поясе Койпера. Обнаружен 8 октября 1996 года Дэвидом Джуиттом, Чадом Трухильо, Дейно Х. Лю и Чэнь в обсерватории Мауна-Кеа, Гавайи. Он находится в орбитальном резонансе 1:2 с Нептуном, поэтому он был классифицирован как тутино[3][4], из которых он был обнаружен первым.

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