True mass
The term true mass is synonymous with the term mass, but is used in astronomy to differentiate the measured mass of a planet from the lower limit of mass usually obtained from radial velocity techniques.[1] Methods used to determine the true mass of a planet include measuring the distance and period of one of its satellites,[2] advanced astrometry techniques that use the motions of other planets in the same star system,[1] combining radial velocity techniques with transit observations (which indicate very low orbital inclinations),[3] and combining radial velocity techniques with stellar parallax measurements (which also determine orbital inclinations).[4]
See also
References
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