Saw this
old blog from 2020, not sure if it's still viable but the AP for shaking a mountain that's 1 km tall was like City Block Level. I looked up average size of a volcano and got around 3 km, so I just plugged it into the formula and got around Multi-City block level. (Again, not sure if this blog is still viable)
So, using this
blog (Mountain and Island Level Requirements), an average island has a "value of 51755m for length and width of said island respectively". So for the asteroid, going to assume a spherical shape so we can get a volume (V = (4/3) * pi * (51755 / 2)^3). The density of an average asteroid is also suppose to be ~3350 kg/m^3. So to get weight, we just multiply volume by density so: kg = (4/3) * pi * (51755 / 2)^3 * 3350 = 2.4316461 * 10^17 kg (Class P - The weight of small moons or small asteroids), so it seems right.