# Easy Ad Hoc Orbital Time Calculation *Created:* 2024-07-09, *Modified:* 2024-07-10 ![[Orbital Period Calculation.png]] One of the great things about having a place to jot down thoughts and considerations about TTRPGs is that I can find really cool, very useful threads like this and tuck them away somewhere for future reference. Need to know how long it takes to orbit a body in **[[Ironsworn - Starforged|Starforged]]** or **[[Traveller]]**? Figure out what it's made of and estimate based on this. Want to reverse calculate what the density of a body is given a desired orbital period? No problem. Crunch it the other way. This entire thread is absolutely worth reading, and I encourage you to do so.