Home » Simplify your calculations with ease. » Physics Calculators » Radial Velocity Calculator Online

The Radial Velocity Calculator is a powerful tool used in astronomy to determine the velocity of an object relative to an observer. It helps scientists and astronomers understand the motion of celestial bodies such as stars, planets, and galaxies in relation to the Earth.

### Formula of Radial Velocity Calculator

The formula used in the Radial Velocity Calculator is:

`v_r = v * sin(θ)`

Where:

• v: The velocity of the object.
• θ: The angle between the velocity vector and the line of sight.

### Example of Radial Velocity Calculator

Let’s consider an example to illustrate the use of the Velocity Calculator:

Suppose we have a star moving at a velocity of 5000 m/s, and the angle between its velocity vector and the line of sight from Earth is 30 degrees. Using the formula mentioned above, we can calculate the radial velocity as follows:

`v_r = 5000 * sin(30) v_r ≈ 2500 m/s`

So, the radial velocity of the star, as observed from Earth, is approximately 2500 m/s.

### Most Common FAQs

Q: Why is radial velocity important in astronomy?

A: Radial velocity measurements provide crucial information about the movement of celestial objects relative to Earth, aiding in the study of their orbits, compositions, and interactions with other bodies.

Q: Can the Velocity Calculator be used for non-celestial objects?

A: While the calculator’s formula is derived from astronomical principles, it can theoretically be applied to any moving object as long as the velocity vector and line of sight angle are known.