We present recent results of and current work on photometry of artificial satellites at the Astronomical Observatory of Castelgrande (Italy) in 2019–2020: Results of long-term photometry of upper stages Falcon 9 R/B and Atlas 5 Centaur R/B. Preliminary results of Intelsat 29E long-term photometry. On-going photometry of decaying space debris. Development of photometry software for analysis of rotation period and rotation axis orientation. Development of a new open-access database for artificial satellite photometry. Theory of a light curve modelling method with Blender 3D.