"To estimate the mass" means to make an educated guess or approximate calculation of how much something weighs.
Sentences with «to estimate the mass»
The team estimated the mass by observing the speed of a representative sample of stars in each galaxy. (sciencemag.org)
In this case, researchers estimated the mass of the black hole would be 36 times the solar mass or larger. (sciencedaily.com)
From a transit - based estimate of the host star's mean density, combined with analysis of high - resolution spectra, we infer that the host star is near turnoff from the main sequence, with estimated mass and radius of 1.223 (+0.053 -0.091) solar masses and 1.487 (+0.071 -0.084) solar radii. (arxiv.org)