Lightcurve analysis is a method used in astronomy to study the variation in brightness of a celestial object over time. This variation can provide valuable information about the object's characteristics, such as its rotation period, size, shape, and surface features. Lightcurves are typically obtained by measuring the object's brightness at different times and plotting these measurements on a graph. By analyzing the shape of the lightcurve, astronomers can gain insights into the physical properties of the object and its behavior. Lightcurve analysis is commonly used in the study of asteroids, comets, variable stars, and exoplanets.