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93 Minerva
Main-belt asteroid

93 Minerva is a large triple main-belt asteroid. It is a C-type asteroid, meaning that it has a dark surface and possibly a primitive carbonaceous composition. It was discovered by J. C. Watson on 24 August 1867, and named after Minerva, the Roman equivalent of Athena, goddess of wisdom. An occultation of a star by Minerva was observed in France, Spain and the United States on 22 November 1982. An occultation diameter of ~170 km was measured from the observations. Since then two more occultations have been observed, which give an estimated mean diameter of ~150 km.

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Satellites

On 16 August 2009, at 13:36 UT, the Keck Observatory's adaptive optics system revealed that the asteroid 93 Minerva possesses 2 small moons.3 They are 4 and 3 km in diameter and the projected separations from Minerva correspond to 630 km (8.8 x Rprimary) and 380 km (5.2 x Rprimary) respectively.4 They have been named Aegis5 (/ˈiːdʒɪs/)6 and Gorgoneion7 (/ˌɡɔːrɡəˈnaɪən/).8

Notes

References

  1. Millis, R.L; Wasserman, L.H; Bowell, E; Franz, O.G; Nye, R; Osborn, W; Klemola, A (1985), "The occultation of AG+29°398 by 93 Minerva", Icarus, 61 (1): 124–131, Bibcode:1985Icar...61..124M, doi:10.1016/0019-1035(85)90159-9, hdl:2060/19840022996 /wiki/Bibcode_(identifier) ↩

  2. "Observed minor planet occultation events". astro.cz. 26 July 2005. Retrieved 3 September 2020. http://mpocc.astro.cz/world/mpocc1.txt ↩

  3. Franck Marchis (21 August 2009). "The discovery of a new triple asteroid, (93) Minerva". Cosmic Diary Blog. Retrieved 25 October 2009. http://cosmicdiary.org/fmarchis/2009/08/21/the-discovery-of-a-new-triple-asteroid-93-minerva/ ↩

  4. Franck Marchis (21 August 2009). "The discovery of a new triple asteroid, (93) Minerva". Cosmic Diary Blog. Retrieved 25 October 2009. http://cosmicdiary.org/fmarchis/2009/08/21/the-discovery-of-a-new-triple-asteroid-93-minerva/ ↩

  5. Franck Marchis (26 December 2013). "Asteroid Minerva finds its magical weapons in the sky". The Planetary Society. Retrieved 7 April 2023. https://www.planetary.org/articles/20131224-asteroid-minerva-finds-its-magical-weapons-in-the-sky ↩

  6. "aegis". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 23 March 2020. https://web.archive.org/web/20200323141618/https://www.lexico.com/definition/aegis ↩

  7. Franck Marchis (26 December 2013). "Asteroid Minerva finds its magical weapons in the sky". The Planetary Society. Retrieved 7 April 2023. https://www.planetary.org/articles/20131224-asteroid-minerva-finds-its-magical-weapons-in-the-sky ↩

  8. "gorgoneion". Lexico UK English Dictionary UK English Dictionary. Oxford University Press. Archived from the original on 23 March 2020. https://web.archive.org/web/20200323141620/https://www.lexico.com/definition/gorgoneion ↩