| HD 12661 c | |
| Discoverer: | Fischer et al. |
| Discovery Site: | California & Carnegie Planet Search  United States |
| Discovered: | April 1, 2003 |
| Apsis: | astron |
| Semimajor: | 2.56AU |
| Eccentricity: | 0.031 ± 0.022 |
| Period: | 1708 ± 14 d |
| Time Periastron: | 2,452,130 ± 330 |
| Arg Peri: | 38 |
| Semi-Amplitude: | 29.27 ± 0.88 |
HD 12661 c is a giant exoplanet one and a half times the mass of Jupiter orbiting around HD 12661.