method number orbital_period mass distance year
0 Radial Velocity 1 269.30 7.10 77.40 2006
2 Radial Velocity 1 763.00 2.60 19.84 2011
3 Radial Velocity 1 326.03 19.40 110.62 2007
6 Radial Velocity 1 1773.40 4.64 18.15 2002
7 Radial Velocity 1 798.50 NaN 21.41 1996