HD 164604 b

{{Short description|Extrasolar planet in the constellation Sagittarius}}

{{Infobox planet

| name = HD 164604 b / Caleuche

| discoverer = Arriagada et al.

| discovery_site = Las Campanas Observatory

| discovered = January 26, 2010

| discovery_method = Doppler spectroscopy

| apsis = astron

| aphelion = {{convert|1.40|AU|km|abbr=on}}

| perihelion = {{convert|0.85|AU|km|abbr=on}}

| semimajor = {{convert|1.13|±|0.05|AU|km|abbr=on}}

| 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

| inclination = {{val|29|19|u=deg}}

| mass = {{val|14.3|5.5|ul=Jupiter mass}}

}}

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.{{cite web|title=HD 164604|url=https://exoplanet.eu/catalog/hd_164604_b--640/|work=Extrasolar Planets Encyclopaedia|access-date=28 June 2013}}

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.{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}

An astrometric measurement of the planet's inclination and true mass was published in 2022 as part of Gaia DR3.