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14871 Pyramus

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14871 Pyramus, provisional designation 1990 TH7, is a dark Zhongguo asteroid from the outermost region of the asteroid belt, approximately 9 kilometers (6 miles) in diameter. It was discovered on 13 October 1990 by German astronomers Lutz Schmadel and Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Germany.[1] The asteroid was named for Pyramus from classical mythology.[2]

14871 Pyramus
Discovery [1]
Discovered by L. D. Schmadel
F. Börngen
Discovery site Karl Schwarzschild Obs.
Discovery date 13 October 1990
Designations
(14871) Pyramus
Named after
 Pyramus [2]
(Classical mythology)
1990 TH7 · 1972 TJ3
1978 TW4
main-belt [1] · (outer)[3]
background [4] · Zhongguo [5]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 62.73 yr (22,913 d)
Aphelion 4.0337 AU
Perihelion 2.5706 AU
3.3021 AU
Eccentricity 0.2215
6.00 yr (2,192 d)
266.76°
0° 9m 51.48s / day
Inclination 0.9882°
5.9989°
314.20°
Physical characteristics
Mean diameter
 9 km (estimated at 0.06)[6]
9.180±0.302[7]
0.069±0.020[7]
13.9[3]

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    Pyramus is a non-family asteroid from the main belt’s background population. It is a member of the small group of Zhongguo asteroids, located in the 2 : 1 mean motion resonance with the giant planet Jupiter. Contrary to the nearby unstable Griqua group, the orbits of the Zhongguos are stable over half a billion years.[4][5][8]

    It orbits the Sun in the outer main-belt at a distance of 2.6–4.0 AU once every 6.00 years (2,192 days; semi-major axis of 3.3 AU). Its orbit has an eccentricity of 0.22 and an inclination of 1° with respect to the ecliptic.[3] The first precovery was taken at Palomar Observatory in 1954, extending the asteroid’s observation arc by 36 years prior to its discovery.[1]

    . . . 14871 Pyramus . . .

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    . . . 14871 Pyramus . . .

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