911 Agamemnon
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery date | 19 March 1919 |
| Designations | |
| 1919 FD | |
| Jupiter Trojan | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 96.81 yr (35359 days) |
| Aphelion | 5.6215 AU (840.96 Gm) |
| Perihelion | 4.9275 AU (737.14 Gm) |
| 5.2745 AU (789.05 Gm) | |
| Eccentricity | 0.065792 |
| 12.11 yr (4424.58 d) | |
| 186.643° | |
| 0° 4m 52.91s / day | |
| Inclination | 21.762° |
| 338.017° | |
| 81.402° | |
| Earth MOID | 4.01857 AU (601.170 Gm) |
| Jupiter MOID | 0.108514 AU (16.2335 Gm) |
| Jupiter Tisserand parameter | 2.853 |
| Physical characteristics | |
Mean radius | 83.33±1.95 km |
| 6.592 h (0.2747 d) | |
| 0.0444±0.002 | |
| 7.89 | |
|
| |
911 Agamemnon is a large 167 kilometres (104 mi) trojan asteroid that orbits the Sun at the same distance as the planet Jupiter. It is located in the leading Lagrangian point L4. Based on IRAS data, Agamemnon is 167 kilometres (104 mi) in diameter and is probably the 2nd largest Jupiter Trojan.[2] Recent observations of the asteroid's occultations characterize its shape[3] and are suggestive of Agamemnon to have a satellite.[4]
It was discovered by Karl Wilhelm Reinmuth on March 19, 1919, in Heidelberg, Germany.[1] It is named after King Agamemnon, a main character of the Iliad.
| Trojan | Diameter (km) |
|---|---|
| 624 Hektor | 225 |
| 911 Agamemnon | 167 |
| 1437 Diomedes | 164 |
| 1172 Äneas | 143 |
| 617 Patroclus | 141 |
| 588 Achilles | 135 |
| 1173 Anchises | 126 |
| 1143 Odysseus | 126 |
| Source: JPL Small-Body Database, IRAS data | |
Photometric observations of this asteroid during 1997 were used to build a light curve showing a rotation period of 6.5819 ± 0.0007 hours with a brightness variation of 0.29 ± 0.01 magnitude. A 2009 study yielded a period of 6.592 ± 0.004, in reasonable agreement with the previous result.[5]
References
- 1 2 "JPL Small-Body Database Browser: 911 Agamemnon (1919 FD)" (2012-02-10 last obs). Jet Propulsion Laboratory. Retrieved 2 May 2016.
- ↑ "JPL Small-Body Database Search Engine: orbital class (TJN) and diameter > 50 (km)". JPL's Solar System Dynamics Group. Retrieved 2012-03-28.
- ↑ "Agamemnon profile predicted from distributedly observed occultations of the same star". IOTA (International Occultation Timing Association). Retrieved 2012-05-18.
- ↑ "On 2012-01-19 (911) Agamemnon occults HIP 41337 (SAO 60804)". Steve Conard, Willow Oak Observatory. Retrieved 2012-05-18.
- ↑ Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; Hahn, Gerhard; Schober, Hans-Josef; Lahulla, Felix; Delbò, Marco; Lagerkvist, Claes-Ingvar (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 170. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170.
