Heh heh, no test - just remember that all that applies to solid bodies, and fudge the size 1/3 to 2/3 larger when you start adding lots of volatiles.GamingGlen wrote:Thanks for the information. I was using the right equation after all for surface gravity, so it was not as linear as I had thought when I posted.

Here's some related stuff that may be helpful

- mass m = dr³ = gr² × 5.9736E+24 kg

radius r = g/d = sqrt(m/g) = cbrt(m/d) = m^1/3 d^(-1/3) × 6,371 km

density d = g/r = m/r³ = mr^-3 = g^1.5/sqrt(m) × 5.515 g/cm³

gravity g = dr = m/r² = mr^-2 = m/cbrt(m/d)² = m^1/3 d^(2/3) × 9.80665 m/s²

esc velocity ve = sqrt(gr) = sqrt(dr²) = sqrt(m/r) × 11.186 km/s

horizon distance = sqrt(r) × 4.654 km

surface area a = r² × 510,065,624.78 km²

volume v = r³ × 1,083,207,324,897.38 km³