588 Achilles
|
|
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Max Wolf |
| Discovery date | February 22, 1906 |
| Alternate designations | 1906 TG B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Trojan asteroid |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch October 22, 2004 (JD 2453300.5) | |
| Eccentricity (e) | 0.147 |
| Semi-major axis (a) | 776.669 Gm (5.192 AU) |
| Perihelion (q) | 662.395 Gm (4.428 AU) |
| Aphelion (Q) | 890.944 Gm (5.956 AU) |
| Orbital period (P) | 4320.803 d (11.83 a) |
| Mean orbital speed | 13.00 km/s |
| Inclination (i) | 10.324° |
| Longitude of the ascending node (Ω) | 316.583° |
| Argument of perihelion (ω) | 132.770° |
| Mean anomaly (M) | 157.779° |
| Physical characteristics | |
| Dimensions | 135.5 km |
| Mass | 2.6×1018 kg |
| Density | 2.0 g/cm³ |
| Surface gravity | 0.0379 m/s² |
| Escape velocity | 0.0716 km/s |
| Rotation period | >0.5 d 1 (http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm) |
| Spectral class | D |
| Absolute magnitude | 8.67 |
| Albedo | 0.0328 2 (http://www.psi.edu/pds/archive/astdata/ALBEDOS/albedos.tab) |
| Mean surface temperature | ~124 K |
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, a fictional hero from the Trojan War. 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", whilst 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).
... | Previous asteroid | 588 Achilles | Next asteroid | ...
| The minor planets |
| Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans |
| Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud |
| (For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system) |
| (For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.) |