Sinope (moon) facts for kids
|Discovered by||S. B. Nicholson|
|Discovery date||July 21, 1914|
|Shortest distance from what it orbits||18,237,600 km|
|Longest distance from what it orbits||30,191,200 km|
|Avg. distance from the center of its orbital path||23,540,000 km|
|How long it takes to complete an orbit||724.1 d (1.95 a)|
|Average speed||2.252 km/s|
|Angle above the reference plane
|128.11° (to the ecliptic)
153.12° (to Jupiter's equator)
|What it orbits||Jupiter|
|Size and other qualities|
|Average radius||~19 km|
|Average density||2.6 g/cm³ (assumed)|
|Surface gravity||0.014 m/s2 (0.001 g)|
|Escape velocity||~0.023 km/s|
|How much light it reflects||0.04 (assumed)|
|Avg. surface temp.||~124 K|
Sinope did not get its present name until 1975; before then, it was simply known as Jupiter IX. It was sometimes called "Hades" between 1955 and 1975.
Sinope orbits Jupiter on a high eccentricity and high inclination retrograde orbit. The orbital elements are as of January 2000. They are changing a lot due to Solar and planetary perturbations. It is often believed to belong to the Pasiphaë group. However, given its mean inclination and different colour, Sinope could be also an independent object, captured independently, unrelated to the collision and break-up at the origin of the group. The diagram illustrates Sinope's orbital elements in relation to other moons of the group.
Sinope has an estimated diameter of 38 km (assuming an albedo of 0.04) The moon is red unlike Pasiphae which is grey.
Sinope (moon) Facts for Kids. Kiddle Encyclopedia.