[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki40\/45-eugenia-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki40\/45-eugenia-wikipedia\/","headline":"45 Eugenia – Wikipedia","name":"45 Eugenia – Wikipedia","description":"From Wikipedia, the free encyclopedia Asteroid with 2 moons Eugenia (minor planet designation: 45 Eugenia) is a large asteroid of","datePublished":"2019-04-10","dateModified":"2019-04-10","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki40\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki40\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","url":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","height":"1","width":"1"},"url":"https:\/\/wiki.edu.vn\/en\/wiki40\/45-eugenia-wikipedia\/","about":["Wiki"],"wordCount":3770,"articleBody":"From Wikipedia, the free encyclopediaAsteroid with 2 moonsEugenia (minor planet designation: 45 Eugenia) is a large asteroid of the asteroid belt. It is famed as one of the first asteroids to be found to have a moon orbiting it. It was also the second triple asteroid to be discovered, after 87 Sylvia.Table of ContentsDiscovery[edit]Physical characteristics[edit]Satellite system[edit]Petit-Prince[edit]S\/2004 (45) 1[edit]See also[edit]References[edit]External links[edit]Discovery[edit]Eugenia was discovered on 27 June 1857 by the Franco-German amateur astronomer Hermann Goldschmidt.[14] His instrument of discovery was a 4-inch aperture telescope located in his sixth floor apartment in the 6th Arrondissement of Paris.[15] It was the forty-fifth minor planet to be discovered. The preliminary orbital elements were computed by Wilhelm Forster in Berlin, based on three observations in July, 1857.[16]The asteroid was named by its discoverer after Empress Eugenia di Montijo, the wife of Napoleon III.[14] It was the first asteroid to be definitely named after a real person, rather than a figure from classical legend.[17]Physical characteristics[edit]Eugenia is a large asteroid, with a diameter of 214\u00a0km. It is an F-type asteroid, which means that it is very dark in colouring (darker than soot) with a carbonaceous composition. Like Mathilde, its density appears to be unusually low, indicating that it may be a loosely packed rubble pile, not a monolithic object. Eugenia appears to be almost anhydrous.[18] Lightcurve analysis indicates that Eugenia’s pole most likely points towards ecliptic coordinates (\u03b2, \u03bb) = (-30\u00b0, 124\u00b0) with a 10\u00b0 uncertainty,[6] which gives it an axial tilt of 117\u00b0. Eugenia’s rotation is then retrograde, rotating backward to its orbital plane.Satellite system[edit]Petit-Prince[edit]In November 1998, astronomers at the Canada-France-Hawaii Telescope on Mauna Kea, Hawaii, discovered a small moon orbiting Eugenia. This was the first time an asteroid moon had been discovered by a ground-based telescope. The moon is much smaller than Eugenia, about 13\u00a0km in diameter, and takes five days to complete an orbit around it.The discoverers chose the name “Petit-Prince” (formally “(45) Eugenia I Petit-Prince”). This name refers to Empress Eugenia’s son, the Prince Imperial. However, the discoverers also intended an allusion to the children’s novella The Little Prince by Antoine de Saint-Exup\u00e9ry, which is about a young prince who lives on an asteroid.[19]S\/2004 (45) 1[edit]A second, smaller (estimated diameter of 6\u00a0km) satellite that orbits closer to Eugenia than Petit-Prince has since been discovered and provisionally named S\/2004 (45) 1.[20] It was discovered by analyses of three images acquired in February 2004 from the 8.2 m VLT “Yepun” at the European Southern Observatory (ESO) Cerro Paranal, in Chile.[21] The discovery was announced in IAUC 8817, on 7 March 2007 by Franck Marchis and his IMCCE collaborators. It orbits the asteroid at about ~700\u00a0km, with an orbital period of 4.7 days.[20]See also[edit]References[edit]^  “Discovery Circumstances: Numbered Minor Planets”. IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. 9 February 2010. Archived from the original on 10 May 2008. Retrieved 12 August 2010.^ “Eugenia”. Oxford English Dictionary (Online\u00a0ed.). Oxford University Press.\u00a0(Subscription or participating institution membership required.)^ “ASTORB”. Orbital elements database. Lowell Observatory.^ a b c Baer, Jim (2008). “Recent Asteroid Mass Determinations”. Personal Website. Archived from the original on 2 July 2013. Retrieved 7 December 2008.^ a b c d “Supplemental IRAS minor planet survey”. Planetary Science Institute. Archived from the original on 17 August 2009.^ a b c Kaasalainen, M.;  et\u00a0al. (2002). “Models of Twenty Asteroids from Photometric Data” (PDF). Icarus. 159 (2): 369\u2013395. Bibcode:2002Icar..159..369K. doi:10.1006\/icar.2002.6907.^ a b c d P. Vernazza et al. (2021) VLT\/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56^ Marchis, F. “synthesis of several observations”. Berkeley. Archived from the original on 13 September 2006.^ a b Marchis, F.;  et\u00a0al. (2004). “Fine Analysis of 121 Hermione, 45 Eugenia, and 90 Antiope Binary Asteroid Systems With AO Observations”. Bulletin of the American Astronomical Society. 36: 1180. Bibcode:2004DPS….36.4602M.^ Uncertainty calculated from uncertainties in the orbit of Petit-Prince.^ a b On the extremities of the long axis.^ “PDS lightcurve data”. Planetary Science Institute. Archived from the original on 9 April 2009.^ “PDS node taxonomy database”. Planetary Science Institute. Archived from the original on 5 August 2009.^ a b Schmadel, Lutz D. (2003). Dictionary of minor planet names. Physics and astronomy online library (5th\u00a0ed.). Springer. p.\u00a019. ISBN\u00a03-540-00238-3.^ J. C. (1867). “Obituary: Herman Goldschmidt”. Memoirs of the Royal Astronomical Society. 36: 114-117. Retrieved 13 August 2010.^ Goldschmidt, H. (July 1857). “New Planet (45)”. Monthly Notices of the Royal Astronomical Society. 17: 263\u2013264. Bibcode:1857MNRAS..17..263G. doi:10.1093\/mnras\/17.9.263b.^ Tobin, William (2003). The life and science of L\u00e9on Foucault: the man who proved the earth rotates. Cambridge University Press. p.\u00a0301. ISBN\u00a00-521-80855-3.^  A. S. Rivkin (2002). “Calculated Water Concentrations on C Class Asteroids” (PDF). Lunar and Planetary Institute. Retrieved 22 May 2008.^ William J. Merlin et al., “On a Permanent Name for Asteroid S\/1998(45)1”. 26 May 2000.^ a b Marchis, F.; Baek, M.; Descamps, P.; Berthier, J.; Hestroffer, D.; Vachier, F. (2007). “S\/2004 (45) 1”. IAU Circular. 8817. Bibcode:2007IAUC.8817….1M.^ “IMCC\u00c9 Breaking News”. Archived from the original on 27 September 2007. Retrieved 30 April 2019.External links[edit]"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki40\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki40\/45-eugenia-wikipedia\/#breadcrumbitem","name":"45 Eugenia – Wikipedia"}}]}]