Use full manual metering on the camera, the meter won't manage it.
The camera is seeing a huge amount of black sky and trying to adjust it to be 18% gray so badly overexposing the moon in the process.
Exposure for the moon is just about one stop above the sunny 16 setting.
(Sunny 16 is the exposure in full sun is 1 / ISO @ F16)
So 1 / ISO at F11 should work.
At ISO 800 it is 1/800 sec at F11. :-) that could be hand holdable with a 200mm lens, on the tripod it should be great.
Also manually focus, and bracket a bit to get the exposure closer.