5144 Achates
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5144 Achates
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Discovery[1]
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| Discovered by | Shoemaker, C. S. |
| Discovery site | Palomar |
| Discovery date | 2 December 1991 |
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Designations
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| Named after | Achates |
| Alternate name(s) | 1991 XX |
| Minor planet category |
Jupiter Trojan[1] |
| Epoch 2012-Mar-14 | |
| Aphelion | 6.6242 AU (Q) |
| Perihelion | 3.7895 AU (q) |
| Semi-major axis | 5.2068 AU (a) |
| Eccentricity | 0.27220 |
| Orbital period | 11.88 yr |
| Mean anomaly | 32.550° (M) |
| Inclination | 8.9028° |
| Longitude of ascending node | 322.85° |
| Argument of perihelion | 331.41° |
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Physical characteristics
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| Dimensions | 92km (IRAS)[1] |
| Rotation period | 5.958 hr[1] |
| Albedo | 0.0576[1] |
| Apparent magnitude | 14.09 to 17.84 |
| Absolute magnitude (H) | 8.90[1] |
5144 Achates (1991 XX) is a Jupiter Trojan discovered on December 2, 1991 by Shoemaker, C. S. at Palomar.
Of the 230+ Jupiter trojans with an absolute magnitude (H) brighter than 11, it currently has the most eccentric orbit.[2]
References
- ^ a b c d e f g "JPL Small-Body Database Browser: 5144 Achates (1991 XX)". Jet Propulsion Laboratory. 2011-11-23 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=5144. Retrieved 2012-04-06.
- ^ "JPL Small-Body Database Search Engine: orbital class (TJN) and H < 11 (mag)". JPL's Solar System Dynamics Group. http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;ast_orbit_class=TJN;OBJ_field=0;ORB_field=0;c1_group=OBJ;c1_item=Ai;c1_op=%3C;c1_value=11;table_format=HTML;max_rows=500;format_option=comp;c_fields=AcBhBgBjBiBnBsAiAp;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&query=1&c_sort=BgD. Retrieved 2012-04-06.
External links
- Orbital simulation from JPL (Java) / Ephemeris
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