Noisy-le-Sec 2016, Luminous object with flame-like and triangular shape

Summary

On November 7, 2016, at 1:35 AM, a witness from their room observed a luminous phenomenon in the sky with a peculiar shape: a round, flame-like base in yellow, topped by a translucent triangle of blue, red, and green colors. The object was moving with a slight upward motion, tracing small zigzags toward the east. Only one witness account was collected, limiting the possibility of confirming additional details. However, GEIPAN investigators concluded that it was likely a cluster of LED balloons filled with helium. These balloons can form various shapes, and when combined with blinking and steady lights, can create the illusion of a flame. Moreover, the zigzag motion and direction of movement align with the weather conditions of the day, where the wind was blowing from west to east. The progressive fading of the object also matches the end of life of the LED lights. Given that it was a weekend, it was plausible for such a festive event involving luminous balloons to occur.