|Discovered by||Max Wolf|
|Discovery date||February 22, 1906|
|Alternative names||1906 TG|
|Minor planet category||Trojan asteroid|
|Epoch October 22, 2004 (JD 2453300.5)|
|Aphelion||890.944 Gm (5.956 AU)|
|Perihelion||662.395 Gm (4.428 AU)|
|Semi-major axis||776.669 Gm (5.192 AU)|
|Orbital period||4320.803 d (11.83 a)|
|Average orbital speed||13.00 km/s|
|Longitude of ascending node||316.583°|
|Argument of perihelion||132.770°|
|Mean density||2.0 g/cm³|
|Equatorial surface gravity||0.0379 m/s²|
|Escape velocity||0.0716 km/s|
|Rotation period||7.3 hr|
|Absolute magnitude (H)||8.67|
588 Achilles is an asteroid discovered on February 22, 1906, by the German astronomer Max Wolf. It was the first of the trojan asteroids to be discovered, and is named after Achilles, the fictional hero from the Iliad. It orbits in the L4 Lagrangian point of the Sun-Jupiter system. After a few such asteroids were discovered, the rule was established that the L4 point was the "Greek camp", while the L5 point was the "Trojan camp", though not before each camp had acquired a "spy" (624 Hektor in the Greek camp and 617 Patroclus in the Trojan camp).
Photometric observations of this asteroid during 1994 were used to build a light curve showing a rotation period of 7.32 ± 0.02 hours with a brightness variation of 0.31 ± 0.01 magnitude. This result is in good agreement with prior studies.
- "JPL Small-Body Database Browser: 588 Achilles (1906 TG)". Jet Propulsion Laboratory. 2012-02-23 last obs.
- "JPL Small-Body Database Search Engine: orbital class (TJN) and diameter > 50 (km)". JPL's Solar System Dynamics Group. Retrieved 2012-03-28.
- Mottola, S. et al. (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.