man-made object round or cylindrical shape antennas and other protrusions solar panels highly reflective surfaces distinct coloration (usually silver or white) a visible trail of smoke or exhaust when launched
satellite which has man-made object satellite which has round or cylindrical shape satellite which is antennas and other protrusions satellite which has solar panels satellite which has highly reflective surfaces satellite which has distinct coloration (usually silver or white) satellite which is a visible trail of smoke or exhaust when launched