INSTRUCTIONS: Choose units and enter the following:
Mass (M): The calculator returns the mass of the object in Earth Masses (multiples of the mass of the Earth). However, this can be automatically converted to other mass units (e.g. kilograms) via the pull-down menu.
The formula for computing the mass of an astronomical object based on the orbital velocity and distance from the greater mass (e.g. stellar object) is:
M = (v2 ⋅ R) / G
The orbital velocity of the Earth as it goes about the Sun is approximately: 29784.7357 m/s. Use this velocity and one astronomical unit for R, and you will get a mass equal to 332968.774 Earth Masses. If you click on the pull-down menu and select solar_mass, you will see that the mass is equal to 1 solar mass.
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