It can't hold an atmosphere. Atmospheric retention is based on escape velocity, not on surface gravity.

It can't hold an atmosphere. Atmospheric retention is based on escape velocity, not on surface gravity.

For those who want the math:

First, escape velocity Calculator: 5.98 km/sec

Second, to convert this to what can be held:

Light molecules such as any hydrogen-bearing one are soon lost. This world holds an atmosphere about as well as Mars--and note what it's like there.