11 Ursae Minoris b

{{short description|Extrasolar planet}}

{{Infobox planet

| name = 11 Ursae Minoris b

| symbol =

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| discoverer = Döllinger et al.

| discovery_site = TLS

| discovered = August 12, 2009

| discovery_method = Radial velocity

| discovery_ref =

| exosolar planets =

| minorplanet =

| extrasolarplanet =

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| orbit_ref =

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| epoch =

| uncertainty =

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| earliest_precovery_date =

| apsis = astron

| aphelion =

| perihelion =

| semimajor = {{convert|1.54 ± 0.07|AU|km|abbr=on}}

| mean_orbit_radius =

| eccentricity = 0.08 ± 0.03

| period = 516.22 ± 3.25 d
1.4133 ± 0.0089 y

| synodic_period =

| avg_speed =

| mean_anomaly =

| mean_motion =

| inclination =

| angular_dist =

| asc_node =

| long_periastron =

| time_periastron = 2452861.05 ± 2.06

| arg_peri = 117.63 ± 21.06

| semi-amplitude =

| satellite_of =

| satellites =

| star = 11 Ursae Minoris

| allsatellites =

| moid =

| mercury_moid =

| venus_moid =

| mars_moid =

| jupiter_moid =

| saturn_moid =

| uranus_moid =

| neptune_moid =

| tisserand =

| p_orbit_ref =

| p_semimajor = {{value|1.54|0.07}}

| p_eccentricity = {{value|0.08|0.03}}

| p_mean_motion =

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| mass = {{value|11.2|0.2}} {{Jupiter mass|link=y}}{{cite web|url=http://www.openexoplanetcatalogue.com/planet/11%20UMi%20b/|title=11 UMi|publisher=Open Exoplanet Catalogue|accessdate=January 23, 2022}}

| density =

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| escape_velocity =

| rotation =

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| note =

}}

11 Ursae Minoris b is an extrasolar planet which orbits the K-type giant star 11 Ursae Minoris, located approximately 390 light years away in the constellation Ursa Minor. This planet has a minimum mass of {{Jupiter mass|link=y|10.5}}. Since inclination is not known, the actual mass is unknown. This planet may actually be a brown dwarf if a true mass is over 13 times that of Jupiter. This planet takes 17 months to orbit the star at the average distance of 1.54 AU in a circular orbit. This superjovian planet was detected by radial velocity method on August 12, 2009.