# Radial Velocity Curve Fitting

Radial Velocity Curve Fitting

This Demonstration shows 10 radial velocity data points folded over a varying period. A sinusoidal fit is calculated using a nonlinear regression technique. This is supposed to show the difficulty of finding a single value for a period based on such a small number of data points. The data comes from real observations made by UCL Astronomy students in 2006 and 2010 using a 1.52 m telescope at OHP, France.