Science

Gravitational force is proportional to the mass, and inversely proportional to the square of the distance (from the centre of mass). So it's 8.6/(2.6*2.6)=1.3 times as strong as our gravity. That's felt by something on a solid surface in a gaseous atmosphere, of course; in water, if you're something that basically floats, it makes no difference.

But it would basically have little effect - things might not be able to grow quite as tall, run as fast, and so on (limits on what stresses legs can stand before they break too often, that kind of thing). If they had a different chemistry (eg not calcium-based bones) it might make more of a difference.