1172 Äneas
| Discovery[1] | |
|---|---|
| Discovered by | Karl Wilhelm Reinmuth |
| Discovery date | 17 October 1930 |
| Designations | |
Named after | Aeneas |
| 1930 UA | |
| Jupiter Trojan[1] | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.49 yr (31227 days) |
| Aphelion | 5.7579 AU (861.37 Gm) (Q) |
| Perihelion | 4.6779 AU (699.80 Gm) (q) |
| 5.2179 AU (780.59 Gm) (a) | |
| Eccentricity | 0.10349 (e) |
| 11.92 yr (4353.52 d) | |
| 188.37° (M) | |
| 0° 4m 57.691s / day (n) | |
| Inclination | 16.664° (i) |
| 247.33° (Ω) | |
| 51.171° (ω) | |
| Earth MOID | 3.69067 AU (552.116 Gm) |
| Jupiter MOID | 0.476014 AU (71.2107 Gm) |
| Jupiter Tisserand parameter | 2.906 |
| Physical characteristics | |
| Dimensions | 143 km (IRAS)[1] |
Mean radius | 71.41±2.4 km |
| 8.705 h (0.3627 d)[1] | |
| 0.0403±0.003[1] | |
| 14.65 to 16.73 | |
| 8.33[1] | |
|
| |
1172 Äneas is a large 143 km L5 Jupiter Trojan.[2] It was discovered by Karl Wilhelm Reinmuth at the Landessternwarte Heidelberg-Königstuhl in Heidelberg, Germany, on October 17, 1930.[1] Its provisional designation was 1930 UA. It is named after Aeneas, a mythological Trojan prince.
Based on IRAS data, Äneas is 143 km in diameter and is the 4th largest Jupiter Trojan.[3]
| 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 1993 were used to build a light curve showing a rotation period of 8.708 ± 0.009 hours with a brightness variation of 0.27 ± 0.01 magnitude.[4]
References
- 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: 1172 Aneas (1930 UA)" (2012-01-18 last obs). Jet Propulsion Laboratory. Retrieved 1 May 2016.
- ↑ "List Of Jupiter Trojans". Minor Planet Center.
- ↑ "JPL Small-Body Database Search Engine: orbital class (TJN) and diameter > 50 (km)". JPL's Solar System Dynamics Group. Retrieved 2012-03-28.
- ↑ 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.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 1172 Äneas at the JPL Small-Body Database
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