A few days in a row this little hiding planet is very clearly visible. Thanks to the good weather and clear skies.
Mercurius
Aircraft Engine
Aircraft photobombing my imaging of NGC2537
Doing some calculations with an assumed heigt of 10000meters and speed of 800 km/hr.
The plane would take 0,24 second to cross the field of 54 meters.
The aircraft engine has a length of about 300 pixels, on the same scale that would be 4 meters.