Map of the Universe
Iapetus
Moon · Moon of Saturn
About Iapetus
On 2026-01-01, the date the map shows, Iapetus was 9.51 AU from the Sun; sunlight takes 79.1 minutes to reach it.
It goes round its planet once every 79.28 days, 3,558,935 km away on average.
It is about 1,469 km across.
The map lists it as a moon and shows it in the Solar System part of the map, drawn on the plane of Earth’s orbit (the ecliptic).
Key numbers
| Orbit radius (semi-major axis) | 3,558,935 km |
|---|---|
| Orbital period | 79.28 days |
| Eccentricity | 0.0291 |
| Inclination | 17.00° |
| Radius | 734.5 km |
| Distance from the Sun | 9.51 AU |
Where it is
Its place in the universe, from the inside out: Saturn › Solar System › Orion–Cygnus Arm (Local Arm) › Milky Way › Local Group › Virgo Supercluster › Laniakea Supercluster › Observable universe.
Zoom out to see it in context: Neptune and the Kuiper belt, a view about 110 AU across.
From Wikipedia
Iapetus is the outermost of Saturn's large moons. With an estimated diameter of 1,469 km (913 mi), it is the third-largest moon of Saturn and the eleventh-largest in the Solar System. Named after the Titan Iapetus from Greek mythology, the moon was discovered in 1671 by Giovanni Domenico Cassini.
Excerpt from the Wikipedia article Iapetus (moon), licensed CC BY-SA 4.0.