I found this anomaly in the latest Curiosity Rover photo. The black object looks like a crashed UFO. The craft is only about 2.5-3 meters across, so it probably only held a few passengers. Since many of the figures we found on Mars are about 5-8 cm tall, then we can conclude that his ship could carry about 20-40 passengers.
There is only two photos of the ship. The rover usually takes many of each area, but not here. Perhaps with further research I might find more.
Scott C. Waring