108 Hecuba
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| Discovery A | |
|---|---|
| Discoverer | R. Luther |
| Discovery date | April 2, 1869 |
| Alternate designations B |
none |
| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0.052 |
| Semi-major axis (a) | 484.831 Gm (3.241 AU) |
| Perihelion (q) | 459.401 Gm (3.071 AU) |
| Aphelion (Q) | 510.261 Gm (3.411 AU) |
| Orbital period (P) | 2131.062 d (5.83 a) |
| Mean orbital speed | 16.53 km/s |
| Inclination (i) | 4.247° |
| Longitude of the ascending node (Ω) |
350.375° |
| Argument of perihelion (ω) |
191.105° |
| Mean anomaly (M) | 241.477° |
| Physical characteristics D | |
| Dimensions | 65 km[1] |
| Mass | ~3.9×1017 kg (estimate) |
| Density | ~2.7 g/cm³ (estimate)[3] |
| Surface gravity | ~0.025 m/s² (estimate) |
| Escape velocity | ~0.040 km/s (estimate) |
| Rotation period | 0.60 d or 1.20 d [2] |
| Spectral class | S |
| Absolute magnitude | 8.09 |
| Albedo (geometric) | 0.243 [1] |
| Mean surface temperature |
~148 K max: 215K (-58° C) |
108 Hecuba is a fairly large and bright main belt asteroid.
Hecuba orbits within the Hygiea family of asteroids but is not otherwise related to other family members because it has a silicate composition. Hygieas are dark C-type asteroids.
It was discovered by R. Luther on April 2, 1869 and named after Hecuba, wife of King Priam in the legends of the Trojan War.
[edit] References
- PDS lightcurve data
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G. A. Krasinsky et al Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
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