| Minorplanet: | yes |
| Mpc Name: | (108) Hecuba |
| Background: |
|
| 108 Hecuba | |
| Discovered: | 2 April 1869 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 3.23912AU |
| Perihelion: | 3.05922AU |
| Aphelion: | 3.419abbr=onNaNabbr=on |
| Eccentricity: | 0.055539 |
| Period: | 5.83 yr (2129.3 d) |
| Inclination: | 4.2204° |
| Asc Node: | 350.014° |
| Arg Peri: | 204.634° |
| Avg Speed: | 16.53 km/s |
| Dimensions: | 65 km[1] |
| Mass: | ~3.9×1017 kg (estimate) |
| Density: | ~2.7 g/cm3 (estimate) |
| Surface Grav: | ~0.025 m/s² (estimate) |
| Escape Velocity: | ~0.040 km/s (estimate) |
| Rotation: | 14.256abbr=onNaNabbr=on 0.60 d or 1.20 d |
| Abs Magnitude: | 8.09 |
| Mean Temp 1: | ~148 |
| Max Temp 1: | 215 |
| Temp Name2: | Celsius |
| Max Temp 2: | -58 |
| Mean Motion: | / day |
| Observation Arc: | 135.87 yr (49628 d) |
| Uncertainty: | 0 |
| Moid: | 2.05833AU |
| Jupiter Moid: | 1.55152AU |
| Tisserand: | 3.178 |
108 Hecuba is a fairly large and bright main-belt asteroid. It was discovered by Karl Theodor Robert Luther on 2 April 1869, and named after Hecuba, wife of King Priam in the legends of the Trojan War in Greek Mythology. This object is orbiting the Sun with a period of 5.83 years and an eccentricity of 0.06. It became the first asteroid discovered to orbit near a 2:1 mean-motion resonance with the planet Jupiter, and is the namesake of the Hecuba group of asteroids.
In the Tholen classification system, it is categorized as a stony S-type asteroid, while the Bus asteroid taxonomy system lists it as an Sw asteroid. Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado in during 2007 produced a light curve with a period of 17.859 ± 0.005 hours with a brightness variation of 0.11 ± 0.02 in magnitude.
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.