Is one quarter the size of Earth has no moons and has an almost non-existent atmosphere?

Yes, one quarter the size of Earth could refer to a celestial body that is significantly smaller, such as a small planet or a large asteroid. If it has no moons, it may not have the gravitational influence that larger planets possess, which can affect atmospheric retention. An almost non-existent atmosphere suggests that the body likely lacks the conditions necessary to support life as we know it, similar to bodies like Mercury or the Moon.