| HD 164604 b / Caleuche | |
| Discoverer: | Arriagada et al. |
| Discovery Site: | Las Campanas Observatory |
| Discovered: | January 26, 2010 |
| Discovery Method: | Doppler spectroscopy |
| Apsis: | astron |
| Aphelion: | 1.4AU |
| Perihelion: | 0.85AU |
| Semimajor: | 1.13± |
| Eccentricity: | 0.24 ± 0.14 |
| Period: | 606.4 ± 9.0 d 1.66 y |
| Avg Speed: | 20.3 |
| Time Periastron: | 24552674 ± 80 |
| Arg Peri: | 51 ± 23 |
| Semi-Amplitude: | 77 ± 32 |
| Star: | HD 164604 |
HD 164604 b is an extrasolar planet discovered in January 2010 in association with the Magellan Planet Search Program. It has a minimum mass 2.7 times the mass of Jupiter and an orbital period of 606.4 days. Its star is classified as a K2 V dwarf and is roughly 124 light-years away from Earth.[1]
HD 164604 b is named Caleuche. The name was selected in the NameExoWorlds campaign by Chile, during the 100th anniversary of the IAU. Caleuche is a large ghost ship from southern Chilean mythology which sails the seas around the island of Chiloé at night.[2] [3]
An astrometric measurement of the planet's inclination and true mass was published in 2022 as part of Gaia DR3.