It followed us during half of our orbit. We observed it on the light side, and when we entered the shadow side, it disappeared completely. It was an engineered structure, made from some type of metal, approximately 40 meters long with inner hulls. The object was narrow here and wider here, and inside there were openings. Some places had projections like small wings. The object stayed very close to us. We photographed it, and our photos showed it to be 23 to 28 meters away.

[…] Many cosmonauts have seen phenomena which are far beyond the experiences of earthmen. For ten years I never spoke on such things. […] It only flew straight, but then a kind of explosion happened, very beautiful to watch, of golden light. This was the first part. Then, one or two seconds later, a second explosion followed somewhere else and two spheres appeared, golden and very beautiful. After this explosion I just saw white smoke, then a cloud-like sphere.

— Victor Afanasyev
Apr 1, 1979

December 9, 1979 at around 9:15 am… The object [had] a precise contour, a gray metal color on the top and dark blue below, with no lights or portholes. It went about three meters from the ground, not stabilized, and then rose to the level of the trees [250 meters away], while continuously oscillating, then went down again slightly and stopped. It went up a little once again, always while oscillating; it tilted and accelerated quickly to reach a speed much higher than that of a Mirage III [French fighter jet capable of Mach 2], and disappeared.

— Jean-Pierre Fartek
Captain, French Air Force