astro.wikisort.org - Asteroid
Aletheia (minor planet designation: 259 Aletheia) is a very large main-belt asteroid that was discovered by German–American astronomer Christian Peters on June 28, 1886, at Litchfield Observatory, Clinton, New York. The dark and heterogeneously composed X-type (Tholen: CP-type) asteroid contains primitive carbonaceous materials, responsible for its low albedo of 0.04. Aletheia measures about 185 kilometers in diameter and belongs to the largest asteroids of the main-belt. It has a semi-major axis of 3.1 AU and an orbit inclined by 11 degrees with a period of 5.55 years.[1]
| Discovery [1] | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery site | Litchfield Obs., Clinton |
| Discovery date | 28 June 1886 |
| Designations | |
MPC designation | (259) Aletheia |
| Pronunciation | /æləˈθiːə/[2] |
Named after | Aletheia[3] |
Alternative designations | A886 MA, 1947 LD |
Minor planet category | main-belt |
| Adjectives | Aletheian |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 117.00 yr (42,736 days) |
| Aphelion | 3.5353 AU |
| Perihelion | 2.7347 AU |
Semi-major axis | 3.1350 AU |
| Eccentricity | 0.1276 |
Orbital period (sidereal) | 5.55 yr (2027.5 days) |
Mean anomaly | 71.260° |
| Inclination | 10.813° |
Longitude of ascending node | 86.864° |
Argument of perihelion | 168.07° |
| Earth MOID | 1.7207 AU |
| Physical characteristics | |
| Dimensions | 178.60 km[citation needed] 190.05±6.82 km[4] |
| Mass | (7.79±0.43)×1018 kg[4] |
Mean density | 2.16 ± 0.26[4] g/cm3 |
Synodic rotation period | 8.143 h |
Geometric albedo | 0.0436 |
Spectral type | B–V = 0.698 U–B = 0.311 CP (Tholen), X (SMASS) |
Absolute magnitude (H) | 7.76 |
Richard P. Binzel and Schelte Bus further added to the knowledge about this asteroid in a lightwave survey published in 2003. This project was known as Small Main-belt Asteroid Spectroscopic Survey, Phase II or SMASSII, which built on a previous survey of the main-belt asteroids. The visible-wavelength (0.435-0.925 micrometre) spectra data was gathered between August 1993 and March 1999.[5][6]
Lightcurve data has also been recorded by observers at the Antelope Hill Observatory, which has been designated as an official observatory by the Minor Planet Center.[7]
It is named after the Greek goddess of truth, Aletheia, the daughter of Zeus and one of the nurses of Apollo.[3]
References
- "JPL Small-Body Database Browser: 259 Aletheia" (2015-09-15 last obs.). Jet Propulsion Laboratory. Retrieved 14 October 2015.
- 'Alethia' in Noah Webster (1884) A Practical Dictionary of the English Language, with -eia pronounced as in 'Hygeia', 'apatheia', etc.
- Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (259) Aletheia. Springer Berlin Heidelberg. p. 38. doi:10.1007/978-3-540-29925-7_260. ISBN 978-3-540-29925-7.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Bus, S., Binzel, R. P. Small Main-belt Asteroid Spectroscopic Survey, Phase II. EAR-A-I0028-4-SBN0001/SMASSII-V1.0. NASA Planetary Data System, 2003.
- JPL Small-Body Database Browser
- Lightcurve Results
External links
- Lightcurve plot of (259) Aletheia, Antelope Hills Observatory
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- 259 Aletheia at AstDyS-2, Asteroids—Dynamic Site
- 259 Aletheia at the JPL Small-Body Database
На других языках
[de] (259) Aletheia
(259) Aletheia ist ein Asteroid des äußeren Asteroiden-Hauptgürtels, der am 28. Juni 1886 von Christian Heinrich Friedrich Peters am Observatorium von Clinton (USA) entdeckt wurde.- [en] 259 Aletheia
[es] (259) Aletheia
(259) Aletheia es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Christian Heinrich Friedrich Peters el 28 de junio de 1886 desde el observatorio Litchfield de Clinton, Estados Unidos. Está nombrado por la palabra griega para verdad.[2][ru] (259) Алетейя
(259) Алетейя (др.-греч. Αλήθεια) является довольно крупным астероидом главного пояса, который имеет очень тёмную поверхность (темнее, чем уголь), богатую простейшими углеродными материалами. Был открыт 28 июня 1886 года германо-американским астрономом К. Г. Ф. Петерсом в Клинтоне, США и назван по имени древнегреческой богини истины Алетейи[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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