“The spectrograph is the first of its kind in the country which can measure the mass of a planet going around a star. Very few such spectrographs exist around the world (mostly in the USA and in the Europe) that can do such precise measurements.
The scientists observed the target over a time 420 days or about 1.5 years. They measured the mass of the planet using the indigenously designed PRL Advance Radial-velocity Abu-sky Search or PARAS spectrograph integrated with the 1.2-metre telescope located at PRL’s Gurushikhar Observatory in Mount Abu, Rajasthan.
PRL, described as the cradle of space sciences in India, conducts fundamental research in a host of physical sciences including astronomy and space.
“Such a discovery is of importance for understanding the formation mechanism of such super-Neptune or sub-Saturn kind of planets that are too close to the host star.” The detection also adds to a sparse catalogue of 22 other confirmed exoplanet systems that have a mass and radius in this range.