I imaged artificial satellites during the years 1997-2001. I intensively collabored with Bruno Tilgner a french satellite enthousiast. The asteroid (21650) Tilgner I discovered from Gnosca is devoted to him.
The 10 Jan 1998 I imaged the seven ASTRA geostationary satellites with my C8 telescope. The image was published in the May 1998 issue of the magazine Sky and Telescope.
The animation of their movement is here.
In 1998, from 3 to 21 Feb, a prolonged number of clear nights allowed me to capture the movement of the ASTRA satellites.
Bruno Tilgner and me wrote an article in Sterne und Weltraum magazine (6/98) reporting our observations on these interesting objects.
The 26 Feb 2001 I tried to capture all the geostationary satellites above the sky of Gnosca. The image was done with the Baker-Schmidt camera.
Other images showing the beauty of the traces of these objects are in my image gallery.
The Gravity Probe B satellite is doing a fascinating and deep interesting physics experiment on the general relativity theory of Einstein. The satellite, launched the 20 Apr 2004, transits periodically above the Gnosca’s sky. Some pictures showing the trace of the satellite are visible here and here. In the July issue of Sky and Telescope magazine was published the picture of GP-B taken by me.
I imaged the Rosetta probe of ESA during his approach to the Earth the 2 Mar 2005. This movie shows this flyby.
The satellite Giove-A, first exponent of the european fleet for the developing of the GPS system was captured above Gnosca the 8 Jan 2006. This picture shows the faint trace of the satellite at the distance of 23’000 km.
The WMAP satellite (Wilkinson Microwave Anisotropy Probe) lies in the lagrangian L2 point of the Sun-Earth system, just in the opposite direction of the sun. I imaged the satellite the 26 Oct 2006 on a time interval of 2.2 h. The image is here.
My all-sky camera currently records several satellite flashes. In 2009 the camera recorded several hundreds of flashes. These flashes are brilliant (above 0 mag) and last only tenths of second. The following images show the IRIDIUM 33 DEB 33777 producing repeated flashes, separated only minutes apart.