![]() Orbital diagram | |||||||||||||
Discovery | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Discovered by | R. Luther | ||||||||||||
Discovery date | 2 April 1869 | ||||||||||||
Designations | |||||||||||||
(108) Hecuba | |||||||||||||
Pronunciation | /ˈhɛkjʊbə/ [1] | ||||||||||||
Named after | Hecuba | ||||||||||||
Main belt | |||||||||||||
Orbital characteristics [2] | |||||||||||||
Epoch 31 July 2016 ( JD 2457600.5) | |||||||||||||
Uncertainty parameter 0 | |||||||||||||
Observation arc | 135.87 yr (49628 d) | ||||||||||||
Aphelion | 3.4190 AU (511.48 Gm) | ||||||||||||
Perihelion | 3.05922 AU (457.653 Gm) | ||||||||||||
3.23912 AU (484.565 Gm) | |||||||||||||
Eccentricity | 0.055539 | ||||||||||||
5.83 yr (2129.3 d) | |||||||||||||
Average
orbital speed | 16.53 km/s | ||||||||||||
166.649 ° | |||||||||||||
0° 10m 8.648s / day | |||||||||||||
Inclination | 4.2204° | ||||||||||||
350.014° | |||||||||||||
204.634° | |||||||||||||
Earth MOID | 2.05833 AU (307.922 Gm) | ||||||||||||
Jupiter MOID | 1.55152 AU (232.104 Gm) | ||||||||||||
TJupiter | 3.178 | ||||||||||||
Physical characteristics | |||||||||||||
Dimensions | 64.97±4.4
km
[2] 65 km [3] | ||||||||||||
Mass | ~3.9×1017 kg (estimate) | ||||||||||||
Mean
density | ~2.7 g/cm3 (estimate) [4] | ||||||||||||
Equatorial
surface gravity | ~0.025 m/s² (estimate) | ||||||||||||
Equatorial
escape velocity | ~0.040 km/s (estimate) | ||||||||||||
14.256
h (0.5940
d)
[2] 0.60 d or 1.20 d [5] | |||||||||||||
0.2431±0.037 | |||||||||||||
| |||||||||||||
S [6] | |||||||||||||
8.09 | |||||||||||||
Hecuba ( minor planet designation: 108 Hecuba) is a fairly large and bright main-belt asteroid. It was discovered by Karl Theodor Robert Luther on 2 April 1869, [7] 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, [8] and is the namesake of the Hecuba group of asteroids. [9]
In the Tholen classification system, it is categorized as a stony S-type asteroid, [10] while the Bus asteroid taxonomy system lists it as an Sw asteroid. [11] 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. [12]
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.[ citation needed]
![]() Orbital diagram | |||||||||||||
Discovery | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Discovered by | R. Luther | ||||||||||||
Discovery date | 2 April 1869 | ||||||||||||
Designations | |||||||||||||
(108) Hecuba | |||||||||||||
Pronunciation | /ˈhɛkjʊbə/ [1] | ||||||||||||
Named after | Hecuba | ||||||||||||
Main belt | |||||||||||||
Orbital characteristics [2] | |||||||||||||
Epoch 31 July 2016 ( JD 2457600.5) | |||||||||||||
Uncertainty parameter 0 | |||||||||||||
Observation arc | 135.87 yr (49628 d) | ||||||||||||
Aphelion | 3.4190 AU (511.48 Gm) | ||||||||||||
Perihelion | 3.05922 AU (457.653 Gm) | ||||||||||||
3.23912 AU (484.565 Gm) | |||||||||||||
Eccentricity | 0.055539 | ||||||||||||
5.83 yr (2129.3 d) | |||||||||||||
Average
orbital speed | 16.53 km/s | ||||||||||||
166.649 ° | |||||||||||||
0° 10m 8.648s / day | |||||||||||||
Inclination | 4.2204° | ||||||||||||
350.014° | |||||||||||||
204.634° | |||||||||||||
Earth MOID | 2.05833 AU (307.922 Gm) | ||||||||||||
Jupiter MOID | 1.55152 AU (232.104 Gm) | ||||||||||||
TJupiter | 3.178 | ||||||||||||
Physical characteristics | |||||||||||||
Dimensions | 64.97±4.4
km
[2] 65 km [3] | ||||||||||||
Mass | ~3.9×1017 kg (estimate) | ||||||||||||
Mean
density | ~2.7 g/cm3 (estimate) [4] | ||||||||||||
Equatorial
surface gravity | ~0.025 m/s² (estimate) | ||||||||||||
Equatorial
escape velocity | ~0.040 km/s (estimate) | ||||||||||||
14.256
h (0.5940
d)
[2] 0.60 d or 1.20 d [5] | |||||||||||||
0.2431±0.037 | |||||||||||||
| |||||||||||||
S [6] | |||||||||||||
8.09 | |||||||||||||
Hecuba ( minor planet designation: 108 Hecuba) is a fairly large and bright main-belt asteroid. It was discovered by Karl Theodor Robert Luther on 2 April 1869, [7] 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, [8] and is the namesake of the Hecuba group of asteroids. [9]
In the Tholen classification system, it is categorized as a stony S-type asteroid, [10] while the Bus asteroid taxonomy system lists it as an Sw asteroid. [11] 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. [12]
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.[ citation needed]