Bright, silent spherical UAP over Survey Park, Kolkata. It displayed stable white brightness with no blinking navigation lights.
I observed a bright, completely silent spherical aerial object over Survey Park, Kolkata, for approximately 30–40 seconds. The object maintained a stable white brightness with no blinking or flashing navigation lights, ruling out standard commercial aircraft or consumer drones under local aviation regulations.
The object traveled from West to North at an estimated elevation of 50–70 degrees. It displayed an unusual oscillating, down-up-down movement pattern rather than a straight satellite orbit line. Using a fixed tripod, I successfully captured 6 seconds of steady video evidence. In the footage, a faint white trail or dust-like vapor is visible behind the object, which disappeared within milliseconds in the dark sky before the craft ultimately vanished behind a tree line.