Psyche compared to Earth

Metallic asteroid, possibly the exposed core of a small failed planet.

How big is Psyche compared to Mount Etna?

Psyche is roughly six times as wide as Mount Etna.

Psyche orbits on average about three times as far from the Sun as Earth does.

Psyche takes about 5 Earth years to go once round the Sun.

Psyche turns round once in about 4.2 hours; Earth takes about 24 hours.

Its geology: Rich in iron and nickel, unlike almost every other asteroid — though at 4.188 grams per cubic centimetre it cannot be solid metal. Scientists think it might be the exposed metal core of a small planet that lost its rocky layers in ancient collisions.
The machines we sent: NASA’s Psyche spacecraft was launched in 2023 and is due to arrive in August 2029.

The numbers

Mean diameter	222 km
Distance from the Sun, on average	2.926 AU · 437.7 million km · sunlight takes 24 minutes 20 seconds
Once round its orbit	5.005 Earth years
Sunrise to sunrise	4.196 hours