| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery site | Heidelberg Observatory |
| Discovery date | 24 August 1903 |
| Designations | |
| MPC designation | (513) Centesima |
| Pronunciation | /sɛnˈtɛzɪmə/ |
| Alternative designations | 1903 LY |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) (JD 2456400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.65 yr (41144 d) |
| Aphelion | 3.2648 AU (488.41 Gm) |
| Perihelion | 2.7679 AU (414.07 Gm) |
| Semi-major axis | 3.0163 AU (451.23 Gm) |
| Eccentricity | 0.082371 |
| Orbital period (sidereal) | 5.24 yr (1913.5 d) |
| Mean anomaly | 146.99° |
| Mean motion | 0° 11 17.304 / day |
| Inclination | 9.7329° |
| Longitude of ascending node | 184.45° |
| Argument of perihelion | 226.24° |
| Physical characteristics | |
| Mean radius | 25.075±0.9 km(IRAS) |
| Equatorial escape velocity | ~25 m/s (56 mph) |
| Synodic rotation period | 5.23 h (0.218 d) |
| Geometric albedo | 0.0885±0.007 |
| Spectral type | K |
| Absolute magnitude (H) | 9.75 |
513 Centesima is a 50 km Main-belt asteroid orbiting the Sun. It is one of the core members of the Eos family of asteroids. Relatively little is known about this tiny asteroid. It is not known to possess any natural satellites, so its mass is unknown. However, its brief rotation period of just over 5 hours implies that the body must be exceptionally dense, for its gravity is able counteract the centrifugal force. It was discovered 24 August 1903 by late-nineteenth- and early-twentieth-century astronomer Max Wolf. It was his 100th asteroid discovery, hence the name, which in Latin, means "hundredth".
References
- ^ "JPL Small-Body Database Browser: 513 Centesima (1903 LY)" (2012-09-28 last obs). Jet Propulsion Laboratory. Retrieved 8 May 2016.
External links
- 513 Centesima at AstDyS-2, Asteroids—Dynamic Site
- 513 Centesima at the JPL Small-Body Database
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