Visibility I / V
With the naked eye I imagined seeing something miscellaneous in the northwest, since then I no longer saw that trace. In the situation of observation, it was difficult to say at all whether or not there might be a night cloud there. In the end, I came to the conclusion that that night cloud might not be, but just because of the twilight rays, I took a photo of the area for sure.
However, when examining and processing the photograph, it appears that there is a very delicate and dim belt illuminating the night cloud, which looks quite similar to the observations made by others from the same direction at the same time.
The twilight rays were nowhere near as fine as the night before. But they also got a picture.