Re: there's no problem at all about landing on Vesta
so you'd attempt a landing on a surface where local gravity gives your craft a weight of 2750 Newtons* but your main engine is only capable of 0.1N* of thrust?
To land at say 0mph (locally stationary) you'd need an engine capable of equalling the local gravitatonal attraction... or ~27,500 times more powerful.
I'd hazard it would hit Vesta with a fair old thump (i.e. a crippling impact) if it attempted a landing.
* I've revised the weight and thrust figures to appropriate units of force (newtons) from the units of mass (grams) at a rate of 10N/kg (approx the acceleration due to gravity at the earhth's surface) ... as I consider this the appropriate rate, and it's easier maths than 9.8N/Kg
I'll get me coat cos I'm obviously taking it too seriously