Galatea (moon) facts for kids
|Discovered by||Stephen P. Synnott|
|Discovered in||July 1989|
|Semi-major axis||61 953 ± 1 km|
|Orbital eccentricity||0.00004 ± 0.00009|
|Orbital period||0.42874431 ± 0.00000001 d|
|Inclination||0.052 ± 0.011° (to Neptune equator)
0.06° (to local Laplace plane)
|Is a moon of||Neptune|
|Dimensions||204×184×144 km (±~10 km)|
|Mass||2.12 ± 0.08 ×1018 kg|
|Mean density||0.75 ± 0.1 g/cm3|
|Rotation period||assumed synchronous|
|Axial tilt||~zero presumably|
|Surface temp.||~51 K mean (estimate)|
- There is also an asteroid called 74 Galatea.
Galatea was found in late July 1989 from the images taken by the Voyager 2 probe. It was given the designation S/1989 N 4. The discovery was said (IAUC 4824) on August 2, 1989, but the text only talks of "10 frames taken over 5 days", giving a discovery date of sometime before July 28. The name was given on 16 September 1991.
It is not a sphere and shows no sign of any geological changes.
Images for kids
Galatea (moon) Facts for Kids. Kiddle Encyclopedia.