Star-looking dots, dimming into distance of the clear sky.Star-looking dots, no flashing. When we saw them, firstly, they were randomly located in the daytime sky (We guessed they were just over Belarus, located an the east side of the sky), bright and clear visible, slowly moving south. One of them stopped. After 5 minutes the dots lined up, grouped together and continued moving, they started dimming, after 20 minutes we could barely see them, and it was hard to distinguish them from the sight noise (entoptic phenomenon), but it was still possible to catch them so weakly seen.