1437 Diomedes
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| Discovery[1] and designation | |
|---|---|
| Discovered by | Karl Wilhelm Reinmuth |
| Discovery date | August 3, 1937 |
| Designations | |
| Named after | Diomedes |
| Alternative names | 1937 PB |
| Minor planet category | Jupiter Trojan |
| Orbital characteristics | |
| Epoch February 4, 2008 (JD 2454500.5) | |
| Aphelion | 806.077 Gm (5.388 AU) |
| Perihelion | 738.963 Gm (4.940 AU) |
| Semi-major axis | 772.520 Gm (5.164 AU) |
| Eccentricity | 0.043 |
| Orbital period | 4286.226 d(11.74 a) |
| Average orbital speed | 13.10 km/s |
| Mean anomaly | 287.280° |
| Inclination | 20.515° |
| Longitude of ascending node | 315.828° |
| Physical characteristics | |
| Dimensions |
164.3 km (IRAS)[1] ~(284×126×65)[2] |
| Mass | 4.6×1018 kg |
| Mean density | 2.0 g/cm³ |
| Equatorial surface gravity | 0.0459 m/s² |
| Equatorial escape velocity | 0.0869 km/s |
| Sidereal rotation period | 24.46 hr[1] |
| Axial tilt | ?° |
| Pole ecliptic latitude | ? |
| Pole ecliptic longitude | ? |
| Geometric albedo | 0.03[1] |
| Temperature | ~122 K |
| Spectral type | ? |
| Absolute magnitude (H) | 8.30[1] |
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1437 Diomedes is a large 164 km Jupiter trojan asteroid that orbits in the L4 Lagrangian point of the Sun–Jupiter system, in the "Greek Camp" of Trojan asteroids. Based on IRAS data, Diomedes is 164 km in diameter and is the 3rd largest Jupiter Trojan.[3] It was named after the Greek hero Diomedes. It was discovered by Karl Wilhelm Reinmuth on August 3, 1937, in Heidelberg, Germany.[1]
| 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 |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 1437 Diomedes (1937 PB)". 2008-01-18 last obs. Retrieved 2008-05-23.
- ↑ Sato, Isao; Šarounová, Lenka; Fukushima, Hideo (2000). "Size and Shape of Trojan Asteroid Diomedes from Its Occultation and Photometry". Icarus 145 (1): 25–32. Bibcode:2000Icar..145...25S. doi:10.1006/icar.1999.6316.
- ↑ "JPL Small-Body Database Search Engine: orbital class (TJN) and diameter > 50 (km)". JPL's Solar System Dynamics Group. Retrieved 2012-03-28.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- Size and Shape of Trojan Asteroid Diomedes from Its Occultation and Photometry (284×126×65)
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