astro.wikisort.org - AsteroidHarmonia (minor planet designation: 40 Harmonia) is a large main-belt asteroid. It was discovered by German-French astronomer Hermann Goldschmidt on March 31, 1856,[5] and named after Harmonia, the Greek goddess of harmony. The name was chosen to mark the end of the Crimean War.
Main-belt asteroid
40 Harmonia A three-dimensional model of 40 Harmonia based on its light curve |
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Discovered by | H. Goldschmidt |
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Discovery date | March 31, 1856 |
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MPC designation | (40) Harmonia |
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Pronunciation | [1] |
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Named after | Harmonia |
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Alternative designations | 1950 XU |
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Minor planet category | Main belt |
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Epoch December 31, 2006 (JD 2454100.5) |
Aphelion | 355.021 Gm (2.373 AU) |
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Perihelion | 323.537 Gm (2.163 AU) |
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Semi-major axis | 339.279 Gm (2.268 AU) |
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Eccentricity | 0.046 |
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Orbital period (sidereal) | 1,247.514 d (3.42 a) |
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Mean anomaly | 249.120° |
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Inclination | 4.256° |
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Longitude of ascending node | 94.287° |
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Argument of perihelion | 268.988° |
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Dimensions | 107.6 km |
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Mass | ~1.3×1018 kg |
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Synodic rotation period | 0.3712 d (8.909 h)[3] |
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Geometric albedo | 0.242[4] |
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Spectral type | S |
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Apparent magnitude | 9.31 (brightest) |
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Absolute magnitude (H) | 7.0 |
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The asteroid is orbiting the Sun with a period of 3.42 years and a relatively low eccentricity of 0.046. It has a cross-sectional size of 107.6 km. The spectrum of 40 Harmonia matches an S-type (silicate) in the Tholen classification system, and is similar to primitive achondrite meteorites.[6] Photometric observations at the Organ Mesa Observatory in Las Cruces, New Mexico during 2008–09 were used to generate a light curve that showed four unequal minima and maxima per cycle. The curve shows a period of 8.909 ± 0.001 hours with a brightness variation of 0.28 ± 0.02 in magnitude. This result is compatible with previous studies.[3]
Speckle interferometric observations carried out with the Nicholas U. Mayall Telescope at the Kitt Peak National Observatory during 1982–84 failed to discover a satellite companion.[7] In 1988 a search for satellites or dust orbiting this asteroid was performed using the UH88 telescope at the Mauna Kea Observatories, but the effort came up empty.[8]
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- Yeomans, Donald K., "40 Harmonia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 7 April 2013.
- Pilcher, Frederick (October 2009), "New Lightcurves of 8 Flora, 13 Egeria, 14 Irene, 25 Phocaea 40 Harmonia, 74 Galatea, and 122 Gerda", The Minor Planet Bulletin, vol. 36, no. 4, pp. 133–136, Bibcode:2009MPBu...36..133P.
- Asteroid Data Archive, Planetary Science Institute, archived from the original on 23 June 2006, retrieved 3 November 2008.
- "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
- Hiroi, T.; et al. (March 1993), "Modeling of S-type asteroid spectra using primitive achondrites and iron meteorites", Icarus, vol. 102, no. 1, pp. 107–116, Bibcode:1993Icar..102..107H, doi:10.1006/icar.1993.1036.
- Roberts, Lewis C., Jr.; et al. (November 1995), "A Speckle Interferometric Survey for Asteroid Duplicity", Astronomical Journal, vol. 110, pp. 2463–2468, Bibcode:1995AJ....110.2463R, doi:10.1086/117704.
- Gradie, J.; Flynn, L. (March 1988), "A Search for Satellites and Dust Belts Around Asteroids: Negative Results", Abstracts of the Lunar and Planetary Science Conference, vol. 19, pp. 405–406, Bibcode:1988LPI....19..405G.
External links
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На других языках
[de] (40) Harmonia
(40) Harmonia ist ein Asteroid des Hauptgürtels, der am 31. März 1856 von Hermann Mayer Salomon Goldschmidt entdeckt wurde.
- [en] 40 Harmonia
[es] (40) Harmonia
(40) Harmonia es un asteroide que forma parte del cinturón de asteroides y fue descubierto el 31 de marzo de 1856 por Hermann Mayer Salomon Goldschmidt desde París, Francia. Está nombrado por Harmonía, un personaje de la mitología griega.[2]
[ru] (40) Гармония
(40) Гармония (лат. Harmonia) — астероид главного пояса, который принадлежит к светлому спектральному классу S. Он был открыт 31 марта 1856 года немецким астрономом Германом Гольдшмидтом с помощью 4-дюймового телескопа, расположенного на шестом этаже его квартиры в Латинском квартале Парижа, и назван в честь древнегреческой богини согласия Гармонии, дочери Ареса и Афродиты. Название было выбрано в ознаменование окончания Крымской войны 1853—1856[2].
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