41 Lyncis b
| Discovery | |
|---|---|
| Discovered by | Sato et al. |
| Discovery site | Okayama Planet Search Program, Japan |
| Discovery date | February 19, 2008 |
| radial velocity | |
| Designations | |
| Arkas | |
| Orbital characteristics | |
| 0.648 AU (96.9 million km) | |
| Eccentricity | 0.040+0.022 −0.031 |
| 183.93±0.09 d | |
| 2454354.4+80.2 −16.9 JD | |
| Semi-amplitude | 56.42+1.87 −1.88 m/s |
| Star | 41 Lyncis |
| Physical characteristics | |
| Mass | ≥1.654+0.054 −0.055 MJ |
41 Lyncis b (abbreviated 41 Lyn b), also designated HD 81688 b and named Arkas /ˈɑːrkəs/, is a candidate exoplanet approximately 276 light-years from Earth in the constellation of Ursa Major.
A gas giant with a minimum mass 2.7 times that of Jupiter, it orbits the K-type star 41 Lyncis with an orbital period of 184 days (corresponding to a semi-major axis of 0.81 AU). It was discovered and announced by Bun'ei Sato on February 19, 2008.