It would've negligible gravitational effects on anything essentially regardless of distance.The 44th Indp Legion wrote:actually, a singularity only has very limited non-newtonian effects outside the swartzschild radius, so a tiny singularity would only have very localised effects, as it's a product of density, rather than pure mass, especially if you add technobabble. A 1kg black hole would have neglible effects on anything further than say, 10 to 100 metres away. (can't be bothered with the exact maths right now, but it's a good estimate)
A kilogram is a kilogram.