My friend Marcel Wilmet took a CCD image of M104 on which a sat gives a little line. He gave me the following data:
Place of observation: Mariembourg Belgium (50d06m N 004d31m E) Time: On may 07 1995 at 22h49 UT Exposure duration: 5 to 10 sec.
According to my identification program that sat should be the geostationary UFO 3 (USA 104), Norad 23132, Cospar 94- 35 A. Below is the picture he took.