HD 39194#Planetary system

HD 39194 has a general stellar classification of K0 V, indicating that it is a K-type main-sequence star. Houk & Cowley found a slightly warmer class of G8 V, instead making it a G-type main-sequence star. Nevertheless, it has 71% the mass of the Sun and an effective temperature of {{val|5205|ul=K|fmt=commas}}, giving an orange hue. Its photosphere radiates a luminosity only 38% that of the Sun. HD 39194 is estimated to be 11.7 billion years old and is extremely chromospherically inactive. Despite being a planetary host, it has an iron abundance only 24% that of the Sun. HD 39194's projected rotational velocity is similar to the Sun's, with the value being {{val|2|ul=km/s}}.

Three planet candidates around this star were first reported in a 2011 preprint. After 10 years of observations, a team of astronomers confirmed 3 super-Earths circling HD 39194 in eccentric orbits; none of the planets are in the habitable zone. HD 39194 b and d have similar masses.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass_earth = ≥4.13{{±|0.20}}

| period = 5.6368{{±|0.0004}}

| semimajor = 0.056{{±|0.001}}

| eccentricity = <0.207

}}

{{OrbitboxPlanet

| exoplanet = c

| mass_earth = ≥6.29{{±|0.51}}

| period = 14.030{{±|0.003}}

| semimajor = 0.103{{±|0.002}}

| eccentricity = <0.154

}}

{{OrbitboxPlanet

| exoplanet = d

| mass_earth = ≥4.13{{±|0.60}}

| period = 33.91{{±|0.03}}

| semimajor = 0.185{{±|0.003}}

| eccentricity = <0.333

}}

{{Orbitbox end}}

• List of multiplanetary systems
• Pi Mensae, another exoplanet-hosting star in the same constellation.

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{{Stars of Mensa}}

Category:K-type main-sequence stars

Category:Planetary systems with three confirmed planets

Category:Mensa (constellation)

039194

027080

0217.2

CD-70 340