astro.wikisort.org - Asteroid
Eleonora (minor planet designation: 354 Eleonora) is a large, stony main-belt asteroid that was discovered by the French astronomer Auguste Charlois on January 17, 1893, in Nice.[5]
 | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 17 January 1893 |
| Designations | |
MPC designation | (354) Eleonora |
| Pronunciation | /ɛliəˈnɔːrə/[1] |
Alternative designations | 1893 A |
Minor planet category | Main belt |
| Adjectives | Eleonorian |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.16 yr (44983 d) |
| Aphelion | 3.1188 AU (466.57 Gm) |
| Perihelion | 2.47676 AU (370.518 Gm) |
Semi-major axis | 2.79777 AU (418.540 Gm) |
| Eccentricity | 0.11474 |
Orbital period (sidereal) | 4.68 yr (1709.3 d) |
Mean anomaly | 123.762° |
Mean motion | 0° 12m 38.196s / day |
| Inclination | 18.403° |
Longitude of ascending node | 140.37° |
Argument of perihelion | 5.5215° |
| Physical characteristics | |
| Dimensions | c/a = 0.75±0.08[3] |
Mean diameter | 165±3 km[3] 155.17±8.5 km[2] 154.3±5.6 km[4] |
| Mass | (7.5±2.7)×1018 kg[3] (7.18±2.57)×1018 kg[4] |
Mean density | 3.18±1.14 g/cm3[3] 3.73±1.39 g/cm3[4] |
Synodic rotation period | 4.277 h (0.1782 d) |
Geometric albedo | 0.172[3] 0.1948±0.023 |
Spectral type | S |
Absolute magnitude (H) | 6.44 |
Photometric observations of this asteroid gave a light curve with a period of 13.623 hours. The data was used to construct a model for the asteroid, revealing it to be a regular-shaped object, spinning about a pole with ecliptic coordinates (β, λ) = (+20°, 356°), although this is with an accuracy of only ±10°. The ratio of the major to minor axes lengths is roughly equal to 1.2.[6] It is classified as an S-type asteroid and has an estimated size of 154.34 km.[4] The spectrum of 354 Eleonora reveals the strong presence of the mineral olivine, a relatively rarity in the asteroid belt.[7]
During favorable oppositions, such as in 1968 and 2010, Eleonora can reach an apparent magnitude of +9.31.
References
- "Eleonora". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- Yeomans, Donald K., "354 Eleonora", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
- P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
- Kaasalainen, M.; et al. (October 2002), "Models of Twenty Asteroids from Photometric Data", Icarus, vol. 159, no. 2, pp. 369–395, Bibcode:2002Icar..159..369K, doi:10.1006/icar.2002.6907.
- Burbine, T. H.; et al. (July 2000), "The Nature of Olivine Asteroids", Meteoritics & Planetary Science, vol. 35, pp. A35, Bibcode:2000M&PSA..35R..35B, doi:10.1111/j.1945-5100.2000.tb01796.x.
External links
- 354 Eleonora at AstDyS-2, Asteroids—Dynamic Site
- 354 Eleonora at the JPL Small-Body Database
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На других языках
[de] (354) Eleonora
(354) Eleonora ist ein Asteroid des Hauptgürtels, der am 17. Januar 1893 von Auguste Charlois in Nizza entdeckt wurde.- [en] 354 Eleonora
[es] (354) Eleonora
(354) Eleonora es un asteroide perteneciente al cinturón de asteroides descubierto el 17 de enero de 1893 por Auguste Honoré Charlois desde el observatorio de Niza, Francia. Se desconoce la razón del nombre.[2][ru] (354) Элеонора
(354) Элеонора (лат. Eleonora) — довольно крупный астероид главного пояса, принадлежащий к светлому спектральному классу S, благодаря этому, во время очень близких противостояний, таких, как в 1968 и 2010 годах, видимая звёздная величина астероида может достигать значения 9,31m. Элеонора была открыта 17 января 1893 года французским астрономом Огюстом Шарлуа в обсерватории Ниццы. Происхождение названия неизвестно[1].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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