astro.wikisort.org - Asteroid
283 Emma is a large asteroid of the asteroid belt and the namesake of the Emma family. It was discovered by Auguste Charlois on 8 February 1889, in Nice, France. The reason for its name is unknown.[5]
 A three-dimensional model of 283 Emma based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 8 February 1889 |
| Designations | |
MPC designation | (283) Emma |
| Pronunciation | /ˈɛmə/[1] |
Alternative designations | A889 CA, 1980 FJ12 |
Minor planet category | Main belt (Emma) |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.26 yr (44655 d) |
| Aphelion | 3.49701 AU (523.145 Gm) |
| Perihelion | 2.59675 AU (388.468 Gm) |
Semi-major axis | 3.04688 AU (455.807 Gm) |
| Eccentricity | 0.14773 |
Orbital period (sidereal) | 5.32 yr (1942.6 d) |
Average orbital speed | 17.07 km/s |
Mean anomaly | 127.107° |
Mean motion | 0° 11m 7.148s / day |
| Inclination | 7.99162° |
Longitude of ascending node | 304.369° |
Argument of perihelion | 53.7020° |
| Known satellites | 1 (9±5 km)[3] |
| Physical characteristics | |
| Dimensions | 148.06±4.6 km (IRAS)[2] 160±10 km (AO)[3] |
| Mass | 1.38×1018 kg[4] |
Mean density | 0.81±0.08 g/cm3[4] |
Synodic rotation period | 6.896 h (0.2873 d)[2] |
Geometric albedo | 0.0262±0.002[2] (Dark) |
Absolute magnitude (H) | 8.72[2] |
Measurements made with the IRAS observatory give a diameter of 145.70 ± 5.89 km and a geometric albedo of 0.03 ± 0.01. By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 145.44 ± 7.72 km and a geometric albedo of 0.03 ± 0.01. When the asteroid was observed occulting a star, the results showed a diameter of 148.00 ± 16.26 km.[6]
Satellite
A companion for 283 Emma was detected on 14 July 2003 by W. J. Merline et al. using the Keck II telescope and is designated S/2003 (283) 1. The announcement is contained in the International Astronomical Union Circular (IAUC) 8165.[7] The satellite orbits at a semi-major axis of about 581 km with an eccentricity of 0.12.[3] Emma has a hill sphere with a radius of about 28,000 km.[3]
References
- "Emma". Dictionary.com Unabridged (Online). n.d.
- "JPL Small-Body Database Browser: 283 Emma". Solar System Dynamics (2008-10-30 last obs). Retrieved 11 May 2016.
- Marchis, Franck; P. Descamps; J. Berthier; D. hestroffer; F. vachier; M. Baek; A. Harris; D. Nesvorny (2008). "Main Belt Binary Asteroidal Systems With Eccentric Mutual Orbits". Icarus. 195 (1): 295–316. arXiv:0804.1385. Bibcode:2008Icar..195..295M. doi:10.1016/j.icarus.2007.12.010. S2CID 119244052.
- Jim Baer (12 December 2010). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 29 January 2009. Retrieved 17 July 2015.
- Lutz D. Schmadel (2003). Dictionary of Minor Planet Names (5th ed.). Springer Science & Business Media. p. 40. ISBN 978-3-540-00238-3.
- Ryan, Erin Lee; et al. (April 2012), "The Kilometer-Sized Main Belt Asteroid Population as Revealed by Spitzer", arXiv:1204.1116 [astro-ph.EP]
- S/2003 (283) 1 (Circular No. 8165)
External links
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Orbits of Binary Asteroids with Adaptive Optics (VLT images)
- 283 Emma at AstDyS-2, Asteroids—Dynamic Site
- 283 Emma at the JPL Small-Body Database
На других языках
[de] (283) Emma
(283) Emma ist ein Asteroid des äußeren Asteroiden-Hauptgürtels. Mit einem Durchmesser von 132 km gehört sie zu den größeren Asteroiden des Hauptgürtels und sie hat einen Mond mit der Bezeichnung S/2003 (283) 1.- [en] 283 Emma
[es] (283) Emma
(283) Emma es un asteroide perteneciente al cinturón de asteroides descubierto el 8 de febrero de 1889 por Auguste Honoré Charlois desde el observatorio de Niza, Francia. Se desconoce la razón del nombre.[2][ru] (283) Эмма
(283) Эмма (лат. Emma) — довольно крупный астероид главного пояса, который был открыт 8 февраля 1889 года французским астрономом Огюстом Шарлуа в обсерватории Ниццы. Происхождение названия неизвестно[2]. Эмма относится к спектральному классу X. Её альбедо составляет всего 0,0262, это делает её одним из самых тёмных астероидов главного пояса.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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