5144 Achates
| Discovery[1] | |
|---|---|
| Discovered by | Shoemaker, C. S. |
| Discovery site | Palomar |
| Discovery date | 2 December 1991 |
| Designations | |
Named after | Achates |
| 1991 XX | |
| Jupiter Trojan[1] | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24409 days (66.83 yr) |
| Aphelion | 6.6158 AU (989.71 Gm) (Q) |
| Perihelion | 3.7940 AU (567.57 Gm) (q) |
| 5.2049 AU (778.64 Gm) (a) | |
| Eccentricity | 0.27108 (e) |
| 11.87 yr (4337.28 d) | |
| 148.95° (M) | |
| 0° 4m 58.804s / day (n) | |
| Inclination | 8.9013° (i) |
| 322.83° (Ω) | |
| 331.41° (ω) | |
| Earth MOID | 2.77989 AU (415.866 Gm) |
| Jupiter MOID | 0.572644 AU (85.6663 Gm) |
| Jupiter Tisserand parameter | 2.902 |
| Physical characteristics | |
| Dimensions | 92km (IRAS)[1] |
Mean radius | 45.955 ± 2.55 km |
| 5.958 h (0.2483 d)[1] | |
| 0.0576 ± 0.007[1] | |
| 14.09 to 17.84 | |
| 9.0[1] | |
|
| |
5144 Achates (1991 XX) is a Jupiter Trojan discovered on December 2, 1991 by Shoemaker, C. S. at Palomar.
Photometric observations of this asteroid during 1996 were used to build a light curve showing a rotation period of 5.949 ± 0.014 hours with a brightness variation of 0.20 ± 0.01 magnitude.[2]
Of the 230+ Jupiter trojans with an absolute magnitude (H) brighter than 11, it currently has the most eccentric orbit.[3]
References
- 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 5144 Achates (1991 XX)" (2011-11-23 last obs). Jet Propulsion Laboratory. Retrieved 13 April 2016.
- ↑ 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.
- ↑ "JPL Small-Body Database Search Engine: orbital class (TJN) and H < 11 (mag)". JPL's Solar System Dynamics Group. Retrieved 2012-04-06.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 5144 Achates at the JPL Small-Body Database
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