Small point shaking up and down in the skyIn some night in 2006, May, while observing the Eta Aquarids meteor shower, I noticed a tiny small dark-yellow point shaking up and down in the sky. Besides the shaking, there were no movement. The range of the shaking movement was very small, it seemed to be "trembling".I also observed the object for more than an hour, also with a 50x12 binoculars. Still I didn't make any conclusions about what was that. So I entered my home and went to sleep. Never told anyone bout this.The object was at about 40° altitude and at a NE direction from my location.((NUFORC Note: Witness indicates that the date of the incident is approximate. PD))