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ObserveTheSky › Everything in the sky › Io

Where is Io in the sky?

You will want binoculars for this one.

How to find Io

Its position moves, so there is no fixed place on a map to point at.

Your own sky, right now.

Open in the Planetarium

When can I see Io?

It moves against the stars, so there is no one season for it — when it is up depends on the date.

What the shading meansClose

This is the Earth. Where the globe is clear, this object climbs high in the sky; the darker the shading, the lower it stays; where the globe is black, it never rises at all. If the globe has no shading, it does not matter where on Earth you are.

What Io looks like in different instruments

With 10×50 binoculars

Binoculars find it, especially braced against a wall or a fence — it stays a point of light.

Through a small telescope (a 150 mm Dobsonian)

A tiny point right beside Jupiter — let the telescope stop shaking, then look again.

Io at 100× through a 150 mm telescope100×
🔭 See it drawn as it looks through a telescope
Show Io in the model📖 More details about Io🕒 When can I see Io?🌙 Plan an evening outside