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From Wikipedia, the free encyclopedia

385695 Clete
Discovery [1][2]
Discovered byC. Trujillo
S. S. Sheppard
Discovery siteLas Campanas Obs.
Discovery date8 October 2005
Designations
(385695) 2005 TO74
Named after
Clete[1]
(Greek mythology)
2005 TO74
Neptune trojan · L4[3][4]
centaur[5] · distant[1]
Orbital characteristics[5]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 4
Observation arc10.02 yr (3,661 d)
Aphelion31.575 AU
Perihelion28.534 AU
30.055 AU
Eccentricity0.0506
164.77 yr (60,182 d)
286.36°
0° 0m 21.6s / day
Inclination5.2546°
169.40°
306.84°
Neptune MOID0.523 AU
Physical characteristics
Dimensions97 km[4]
100 km[6]
23.2[6]
8.3[1][5]

385695 Clete, provisional designation 2005 TO74, is a Neptune trojan, co-orbital with the ice giant Neptune, approximately 97 kilometers (60 miles) in diameter.[3][4] It was named after Clete, one of the Amazons from Greek mythology.[1] The minor planet was discovered on 8 October 2005, by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory in Chile.[1] 23 known Neptune trojans have already been discovered.[3]

Numbering and naming

This minor planet was named from Greek mythology after Clete, a member of the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek. Clete was one of the twelve followers of the Amazonian queen Penthesilea and went looking for her after she went missing during the war.[1] According to the queen's will, Clete sailed to Italy and founded the city of Clete. The official naming citation was published by the Minor Planet Center on 18 May 2019 (M.P.C. 114955).[7] The naming follows the scheme already established with 385571 Otrera, which is to name these Neptune trojans after figures related to the Amazons.[8]

Orbit and classification

Clete orbits near Neptune's L4 Lagrangian point about 60° ahead of Neptune and thus has the about same orbital period as Neptune. It orbits the Sun at a distance of 28.5–31.6 AU once every 164 years and 9 months (60,182 days; semi-major axis of 30.06 AU). Its orbit has an eccentricity of 0.05 and an inclination of 5° with respect to the ecliptic.[5]

The Neptune-resonance should keep it more than 19 AU from Neptune for 14,000 years.[2] As of 2016, it is 25.5 AU from Neptune. Clete is located close to the boundary separating stable orbits from unstable ones, and it may be influenced by a secular resonance.[9]

Physical characteristics

Diameter

The discoverers estimate that Clete has a mean-diameter of 100 kilometers based on a magnitude of 23.2.[6] Based on a generic magnitude-to-diameter conversion, it measures approximately 97 kilometers in diameter using an absolute magnitude of 8.3 with an assumed albedo of 0.09.[4][10]

References

  1. ^ a b c d e f g "385695 Clete (2005 TO74)". Minor Planet Center. Retrieved 3 June 2019.
  2. ^ a b "MPEC 2005-U97 : 2005 TN74, 2005 TO74". Minor Planet Electronic Circular–Minor Planet Center. 31 October 2005. Retrieved 3 June 2019.
  3. ^ a b c "List Of Neptune Trojans". Minor Planet Center. 23 May 2019. Retrieved 3 June 2019.
  4. ^ a b c d Johnston, Wm. Robert (25 May 2019). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 3 June 2019.
  5. ^ a b c d "JPL Small-Body Database Browser: 385695 Clete (2005 TO74)" (2013-10-06 last obs.). Jet Propulsion Laboratory. Retrieved 3 June 2019.
  6. ^ a b c Lakdawalla, Emily (13 August 2010). "2008 LC15, the first Trojan asteroid discovered in Neptune's L5 point". The Planetary Society. Retrieved 4 August 2017.
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 June 2019.
  8. ^ Ticha, J.; et al. (10 April 2018). "DIVISION F / Working Group for Small Body Nomenclature Working Group for Small Body Nomenclature. THE TRIENNIAL REPORT (2015 Sept 1 - 2018 Feb 15)" (PDF). IAU. p. 2. Retrieved 25 August 2018.
  9. ^ Zhou, Li-Yong; Dvorak, Rudolf; Sun, Yi-Sui (January 2011). "The dynamics of Neptune Trojans - II. Eccentric orbits and observed objects". Monthly Notices of the Royal Astronomical Society. 410 (3): 1849–1860. arXiv:1007.5362. Bibcode:2011MNRAS.410.1849Z. doi:10.1111/j.1365-2966.2010.17566.x. S2CID 119238700.
  10. ^ "Asteroid Size Estimator". CNEOS/JPL. Retrieved 4 August 2017.

External links

This page was last edited on 27 November 2023, at 18:51
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