This can happen when the hobby astronomer is peacefully sleeping in the night:
star tracks field of view: 30' x 22'
The image was created alone by the computer in combination with the telescope. Exposure time around one hour.
When automatically taking a series of images of comet 240P, the
program lost its guiding star affected by an airplane crossing the guiding field.
© Copyright of all sites and images of this web: Bernhard Haeusler, Dettelbach, Germany IAU code: B82 Maidbronn and K87 Dettelbach Vineyard Observatory