astro.wikisort.org - Asteroid
Eunike (minor planet designation: 185 Eunike) is a dark and very large main-belt asteroid, with an approximate diameter of 157 kilometres. It has a primitive carbonaceous composition.
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters, 1878 |
| Discovery date | 1 March 1878 |
| Designations | |
MPC designation | (185) Eunike |
| Pronunciation | /juːˈnaɪkiː/[1] |
Named after | Εὐνίκη Eynīkē |
Minor planet category | Main belt |
| Adjectives | Eunikean /juːnɪˈkiːən/ |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 131.77 yr (48128 d) |
| Aphelion | 3.0924 AU (462.62 Gm) |
| Perihelion | 2.3843 AU (356.69 Gm) |
Semi-major axis | 2.7383 AU (409.64 Gm) |
| Eccentricity | 0.12930 |
Orbital period (sidereal) | 4.53 yr (1655.1 d) |
Mean anomaly | 327.48° |
Mean motion | 0° 13m 3.036s / day |
| Inclination | 23.238° |
Longitude of ascending node | 153.84° |
Argument of perihelion | 224.01° |
| Earth MOID | 1.41759 AU (212.068 Gm) |
| Jupiter MOID | 2.40697 AU (360.078 Gm) |
| TJupiter | 3.222 |
| Physical characteristics | |
| Dimensions | 157.51±2.6 km[2] 160.61 ± 5.00 km[3] |
| Mass | (3.56 ± 2.61) × 1018 kg[3] |
Mean density | 1.64 ± 1.21 g/cm3[3] |
Synodic rotation period | 21.797 h (0.9082 d)[2] 21.812 ± 0.001 hours[4] |
Geometric albedo | 0.0638±0.002 |
Spectral type | C |
Absolute magnitude (H) | 7.62,[2] 7.45 ± 0.01[4] |
It was discovered by C. H. F. Peters on March 1, 1878, in Clinton, New York and named after Eunike, a Nereid in Greek mythology whose name means 'happy victory'. The name was chosen to celebrate the Treaty of San Stefano (1878).
Based upon photometric observations made between 2010 and 2014, this asteroid has a rotation period of 21.812 ± 0.001 hours and a brightness variation of 0.08 ± 0.01 in magnitude. At opposition, the absolute magnitude was measured at 7.45 ± 0.01. It displays a hemispheric albedo dichotomy similar to that on 4 Vesta.[4]
As of 17 September 2020, there have been thirteen observed occultations of stars by Eunike.
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- "185 Eunike". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- 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.
- Pilcher, Frederick; et al. (October 2014), "A Comprehensive Photometric Investigation of 185 Eunike", of the Minor Planets Section of the Association of Lunar and Planetary Observers, 41 (4): 244–250, Bibcode:2014MPBu...41..244P.
External links
- 185 Eunike at AstDyS-2, Asteroids—Dynamic Site
- 185 Eunike at the JPL Small-Body Database
 | This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |
На других языках
[de] (185) Eunike
(185) Eunike ist ein Asteroid des Asteroiden-Hauptgürtels, der am 1. März 1878 von Christian Heinrich Friedrich Peters entdeckt wurde.- [en] 185 Eunike
[es] (185) Eunike
(185) Eunike es un asteroide que forma parte del cinturón de asteroides y fue descubierto el 1 de marzo de 1878 por Christian Heinrich Friedrich Peters desde el observatorio Litchfield de Clinton, Estados Unidos. Está nombrado por Eunice, una diosecilla de la mitología griega.[2][ru] (185) Эвника
(185) Эвника (др.-греч. Ευνίκη) — крупный астероид главного пояса, с очень низким альбедо поверхности, состоящей, вероятно, из простейших углеродных соединений. Он был открыт 1 марта 1878 года германо-американским астрономом К. Г. Ф. Петерсом в Клинтоне, США и назван в честь одной из нереид древнегреческой мифологии, чьё имя переводится как «счастливая победа». Название было дано в честь Сан-Стефанского договора 1878 года[1].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
WikiSort.org - проект по пересортировке и дополнению контента Википедии