Thanks guys.
Rajan, unfortunately the only lens I had at the time was the 17mm one. The plan for this shot was somewhat convoluted: I knew the rising moon time and azimuth, but it all depended on the time I would be able to return to Lisbon coming from the field trip...
So, I just rushed to the metro, exited and walked down this road to this belvedere, right on time.
Lisbon this time of the year means long days with nice light, so I plan to revisit the area a few more times, after work.
Here is another panorama, taken at the same time, more or less, from a different location.