Saturn at closer distances
Saturn is the object most people picture when they imagine a planet replacing the Moon, and the comparison holds up: the globe alone spans tens of full Moons at that distance, and the ring system reaches considerably further. Its apparent globe size is calculated. An oblate globe carries a reconstruction from Cassini and Hubble observations beneath separate equatorial rings, with mutual shadows and automatic time-lapse rotation.
- 116,460 km
- 10.561 hours
- planet
How big would Saturn look if it replaced the Moon?
At 384,400 km, Saturn spans 17.2° across your sky — about 33 times the width of the full Moon. Light crosses that gap in 1.3 seconds.
The signature view: Saturn at the Moon's distance, rings reaching well past the globe.
How big would Saturn look from a hundredth of an astronomical unit?
At 1,495,979 km, Saturn spans 4.5° across your sky — about 8.6 times the width of the full Moon. Light crosses that gap in 5.0 seconds.
The ring plane and the gap dividing it are unmistakable.
How big would Saturn look from ten million kilometres?
At 10,000,000 km, Saturn spans 40.0′ across your sky — about 1.3 times the width of the full Moon. Light crosses that gap in 33.4 seconds.
The planet recedes, but the rings still make its silhouette unmistakable.
How big would Saturn look from one hundred million kilometres?
At 100,000,000 km, Saturn spans 4.0′ across your sky — about 0.13 times the width of the full Moon. Light crosses that gap in 5.6 minutes.
The rings compress toward a fine line around a small globe.
How big does Saturn look at its closest real approach?
At 8 AU, Saturn spans 20.1″ across your sky — a small fraction of the width of the full Moon. Light crosses that gap in 66.4 minutes.
Saturn is a pale point. Its rings are far below what an unaided eye resolves.
What Perigee calculates and what it renders
The apparent size is calculated, but the light, colour and environmental treatment are an authored visualization. Perigee does not model heat, radiation, gravity or tides.
How Perigee calculates apparent size