HD 164604 b is an extrasolar planet discovered in January 2010 in association with the Magellan Planet Search Program.[2] 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.[3]
| Discovery | |
|---|---|
| Discovered by | Arriagada et al. |
| Discovery site | Las Campanas Observatory |
| Discovery date | January 26, 2010 |
Detection method | Doppler spectroscopy |
| Orbital characteristics | |
| Apastron | 1.40 AU (209,000,000 km) |
| Periastron | 0.85 AU (127,000,000 km) |
Semi-major axis | 1.13 ± 0.05 AU (169,000,000 ± 7,500,000 km) |
| Eccentricity | 0.24 ± 0.14 |
Orbital period (sidereal) | 606.4 ± 9.0 d 1.66 y |
Average orbital speed | 20.3 |
| Inclination | 29°±19°[1] |
Time of periastron | 24552674 ± 80 |
Argument of periastron | 51 ± 23 |
| Semi-amplitude | 77 ± 32 |
| Star | HD 164604 |
| Physical characteristics | |
| Mass | 14.3±5.5 MJ[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.[4][5]
An astrometric measurement of the planet's inclination and true mass was published in 2022 as part of Gaia DR3.[1]