It's tricky to give a straightforward answer to how long it takes a rocket to orbit the moon because there are a few factors to consider:

* Orbital altitude: The higher the orbit, the longer it takes to complete a revolution.

* Type of rocket: Different rockets have different capabilities and speeds.

* Specific mission: Missions might have different objectives that influence the time spent in lunar orbit.

However, we can give you some general information:

* Lunar orbit is significantly slower than Earth orbit: This is because the moon has much weaker gravity.

* Typical lunar orbit times are around 2 hours: This is for orbits at a relatively low altitude.

* Missions might spend days or even weeks in lunar orbit: This is particularly true for missions that need to conduct extensive observation or analysis.

For a more specific answer, you would need to know the following:

* The altitude of the desired lunar orbit: This is the key factor determining the orbital period.

* The specific rocket used for the mission: Its capabilities influence how quickly it can reach and establish an orbit.

* The mission's goals: These dictate how long the spacecraft needs to be in lunar orbit.

Let me know if you have more details, and I can try to give you a more precise estimate!