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(20161) 1996 TR66

Trans-Neptunian object

Field	Value
minorplanet	yes
name	(20161)
background	#C2E0FF
discovery_ref
discovered	8 October 1996
discoverer	D. C. Jewitt
C. Trujillo
J. X. Luu
J. Chen
discovery_site	Mauna Kea Obs.
mpc_name
alt_names
mp_category	TNOtwotino
distant
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	4
observation_arc	12.04 yr (4,398 days)
aphelion	66.612 AU
perihelion	28.630 AU
semimajor	47.621 AU
eccentricity	0.3988
period	328.63 yr (120,032 d)
mean_anomaly	55.593°
mean_motion	/ day
inclination	12.436°
asc_node	343.11°
arg_peri	308.70°
dimensions	139 km
abs_magnitude	7.5

C. Trujillo J. X. Luu J. Chen distant

**** is a trans-Neptunian object orbiting beyond Pluto in the Kuiper belt of the outermost Solar System, approximately 139 km 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. It was the first discovery of a twotino.

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. 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

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.

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 9 January 2001. As of 2025, it has not been named.

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

twotinos discoveries-by-david-c.-jewitt discoveries-by-chad-trujillo discoveries-by-jane-luu discoveries-by-jun-chen-(astronomer) astronomical-objects-discovered-in-1996

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