108 Hecuba

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108 Hecuba
Discovery
Discovered by R. Luther
Discovery date April 2, 1869
Designations
Named after
Hecuba
Main belt
Orbital characteristics[1]
Epoch November 26, 2005 (JD 2453700.5)
Aphelion 510.261 Gm (3.411 AU)
Perihelion 459.401 Gm (3.071 AU)
484.831 Gm (3.241 AU)
Eccentricity 0.052
2131.062 d (5.83 a)
241.477°
Inclination 4.247°
350.375°
191.105°
Physical characteristics
Dimensions 65 km[1]
Mass ~3.9×1017 kg (estimate)
Mean density
~2.7 g/cm³ (estimate)[2]
~0.040 km/s (estimate)
0.60 d or 1.20 d[3]
Albedo 0.243
Surface temp. min mean max
Kelvin ~148 215
Celsius -58
Spectral type
S[4]

108 Hecuba is a fairly large and bright main-belt asteroid. It was discovered by Karl Theodor Robert Luther on April 2, 1869,[5] and named after Hecuba, wife of King Priam in the legends of the Trojan War in Greek Mythology. It became the first asteroid discovered to orbit near a 2:1 mean-motion resonance with the planet Jupiter,[6] and is the namesake of the Hecuba group of asteroids.[7]

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.[8] 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 range of 0.11 ± 0.02 in magnitude.[9]

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.

References

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