| Planet | Period | Tperi (JD-2450000) | ecc | omega (deg) | Vel Amp, K (m/s) | M sin i (Mjup) | a (AU) |
|---|---|---|---|---|---|---|---|
| b | 14.653 d | 1.479 | .02 | 99 | 72.2 | 0.84 | 0.115 |
| c | 44.28 d | 31.4 | .34 | 61 | 13.0 | 0.21 | 0.24 |
| d | 5360 d | 2785 | .16 | 201 | 49.3 | 4.05 | 5.9 |
The inner planet was announced by Butler et al. in January 1997. Analysis of extended velocity measurements reveals additional velocity variations.
The innermost planet of 55 Cancri is a mere 10 million miles off the face of the Sun. Since satellites in prograde rotation experience a transfer of momentum from the parent body, it must have been captured, or spit out of the star; either way, it hasn't been in orbit for long. :')