Earth-like planet the size of Callisto with Io-like moon. Plausible?

Good afternoon! I'm working on a fantasy series set on a very small planet, roughly the size of Pluto or the Moon. I've already read some topics on the small earth-like planets, but mine's a bit unique. Here's why:

(Few parts edited)

The Planet

• Roughly the size between Pluto and Callisto (2370-4800km diameter)
• Same gravity (maybe a bit less) as Earth
• Slightly warmer temperatures than on Earth
• Slightly shorter days and years
• Geologically active (= moving plates and active volcanos)
• Able to sustain intelligent life

The moon

• The size of Io
• Geologically active like Io
• Similar surface like Io
• Basically the same as Io

I have changed few things since the last post. The planet may be upscaled, Pluto-sized planet was maybe an overkill.

I will be very thankful for any answer!

posted over 7 years ago

D. Daniels‭

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