Laghu Samrat Yantra Introduction: Laghu Samrat Yantra is a small sundial made of red sandstone and white marble, also at an angle of 27 degrees. Although it is not as accurate as the Brihat Samrat Yantra, it can also calculate the declination of celestial bodies, and the shadow cast by its hands can measure the local time, which will differ from the local time in India by 10 minutes to 40 minutes.