Lightcurve is a term used in astronomy to describe the graph of the varying brightness of an object over time. This object may be a star, a planet, an asteroid, or a comet. By studying the changes in brightness of these celestial objects, astronomers can learn about their physical properties, such as their rotation rate, shape, and composition. Lightcurve analysis can also provide valuable information about the object's orbit, its interactions with other bodies, and even the presence of moons or rings. The data collected from lightcurves can help astronomers to better understand the dynamics and behavior of objects in the solar system and beyond.