Using the Humanity Star (see this answer for example for background/context), consider two possibilities for spinning a small spherical shell at a low rate, say perhaps in the neighborhood of 2 to 10 RMP.

To rotate a spacectraft, one could use tangential thrusters as discussed in How did the tangential thrusters for the 2014 LDSD test spin-up then spin-down so nicely? and also What ever happened to SpinSat - did it work? for example, or one could use a battery, motor, and flywheel, and a timer or signal to turn it on.

What would be the tradeoffs for each? Perhaps mass, reliability, safety? Are there others?

Let's assume it's a 1.3 meters in diameter shell (most mass at the surface) perhaps a mass of 10 kg.

Using the Humanity Star (see this answer for example for background/context), consider two possibilities for spinning a small spherical shell at a low rate, say perhaps in the neighborhood of 2 to 10 RMP.

To spin a spacectraft in LEO, one could use tangential thrusters as discussed in How did the tangential thrusters for the 2014 LDSD test spin-up then spin-down so nicely? and also What ever happened to SpinSat - did it work? for example, or one could use a battery, motor, and flywheel. In either case a timer or signal would activate the spin-up once it is safely in orbit.

What would be the tradeoffs for each? Perhaps mass, reliability, safety? Are there others?

Let's assume it's a 1.3 meters in diameter shell (most mass at the surface) perhaps a mass of 10 kg.

Using the Humanity Star (see this speculative answer for example) only for background/context, consider two possibilities for spinning a ~1.3 meter diameter spherical shell at a low rate, say perhaps in the neighborhood of 2 to 10 RMP.

To rotate a spacectraft, one could use tangential thrusters as discussed in How did the tangential thrusters for the 2014 LDSD test spin-up then spin-down so nicely? and also What ever happened to SpinSat - did it work? for example, or one could use a battery, motor, and flywheel, and a timer or signal to turn it on.

What would be the tradeoffs for each? Perhaps mass, reliability, safety? Are there others?

Let's assume it's a 1.3 meters in diameter shell (most mass at the surface) perhaps a mass of 10 kg.

Using the Humanity Star (see this answer for example for background/context), consider two possibilities for spinning a small spherical shell at a low rate, say perhaps in the neighborhood of 2 to 10 RMP.

To rotate a spacectraft, one could use tangential thrusters as discussed in How did the tangential thrusters for the 2014 LDSD test spin-up then spin-down so nicely? and also What ever happened to SpinSat - did it work? for example, or one could use a battery, motor, and flywheel, and a timer or signal to turn it on.

What would be the tradeoffs for each? Perhaps mass, reliability, safety? Are there others?

Let's assume it's a 1.3 meters in diameter shell (most mass at the surface) perhaps a mass of 10 kg.