Carme (moon)
| Carme | |
|---|---|
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| Carme on December 16, 1998 at 18:32 UTC from the OHP (Observatoire de Haute-Provence) with a 120-centimeter telescope | |
| Central body | Jupiter |
| Properties of the orbit | |
| Major semi-axis | 23,404,000 km |
| Periapsis | 17,476,000 km |
| Apoapsis | 29,332,000 km |
| eccentricity | 0.2533 |
| Orbit inclination | 164.907 ° |
| Orbital time | 702.30 d |
| Mean orbital velocity | 2.32 km / s |
| Physical Properties | |
| Albedo | 0.04 |
| Apparent brightness | 17.6 mag |
| Medium diameter | 46 km |
| Dimensions | 131,882,822,112,553,000 kg |
| surface | 7000 km 2 |
| Medium density | 2.6 g / cm 3 |
| Acceleration of gravity on the surface | ≈ 0.017 m / s 2 |
| Escape speed | ≈ 27.5 m / s |
| discovery | |
| Explorer | |
| Date of discovery | July 30, 1938 |
| Remarks | retrograde orbit |
Carme (also Jupiter XI) is one of the outer moons of the planet Jupiter .
discovery
Carme was discovered on July 30, 1938 by the astronomer Seth Barnes Nicholson at the Mount Wilson Observatory in California . Nicholson photographed Jupiter between July 5th and August 25th with Carme visible on a photographic plate exposed on July 30th. The discovery of a new moon near Jupiter was then announced at the end of August that year.
The moon was named after Karme , a lover of Zeus from Greek mythology . It only received its official name in 1975 , before it was simply referred to as Jupiter's moon XI , as it was the eleventh discovered moon near Jupiter.
Orbit data
Carme orbits Jupiter at a mean distance of 23,404,000 km in 734 days, 4 hours and 48 minutes. The track has an eccentricity of 0.2533. With an inclination of 164.907 °, the orbit is retrograde ; that is, the moon moves around the planet against the direction of rotation of Jupiter. Based on these orbital data, Carme cannot have originated around Jupiter, but is presumably a captured object. However, it is still unclear exactly how this process took place. Carme is the namesake of a group of moons that move on similar orbits around Jupiter. The Carme group comprises seventeen moons, with Carme being the largest member.
Physical data
Carme has a mean diameter of about 46 km. Its density is estimated at 2.6 g / cm³. It is probably made up mainly of silicate rock. Carme has a very dark surface with an albedo of 0.04. Its apparent brightness is 17.6 m .
Web links
- Seth B. Nicholson: "Two new Satellites of Jupiter", in: Publications of the Astronomical Society of the Pacific , Vol. 50 (1938), No. 297, p. 292-293. (Discovery)
- IAUC 2846: Satellites of Jupiter October 7, 1975 (designation)
- https://solarsystem.nasa.gov/planets/carme/facts
- https://planetarynames.wr.usgs.gov/Page/Planets
| before | Jupiter moons | after that |
| Lysithea | Carme |
Ananke |