Lalaco crashes to Earth and wipes out several city blocks, with even distant towers leaning precariously thanks to her impact. All of the members of Space Patrol in Ogikubo survive this. The height of a floor on average is around 3.1m.
= 2*atan(39/(709/tan(70/2)))
= 0.052114504 rad
= 2.98594113062505384 degrees
Put that through the angscaler and we have a distance of 59.471m to the closest building. Using Nukemap, we get a yield of 0.01928 kilotons (19.28 tons of TNT) for a heavy blast radius of 0.59km, and a fireball radius of 58.4m gets us a yield of 0.4653 kilotons (465.3 tons of TNT). Alternately, using the MIT nuke calculator we get a yield of 1.252 kilotons for fireball radius at breakaway for contact surface burst.
Final Results
Lalaco crashes into Ogikubo Space Patrol (low end) = 19.28 tons of TNT
Lalaco crashes into Ogikubo Space Patrol (mid end) = 465.3 tons of TNT
Lalaco crashes into Ogikubo Space Patrol (high end) = 1.252 kilotons