HD 142022 Ab

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

{{Infobox planet

| name = HD 142022 Ab

| discovery_ref =

| discoverer = Eggenberger et al.

| discovery_site = La Silla Observatory

| discovered = 14 February 2005

| discovery_method = Radial Velocity
(CORALIE)

| orbit_ref =

| apsis = astron

| aphelion =

| perihelion =

| semimajor = {{val|2.939|0.062|ul=AU}}

| eccentricity = {{val|0.506|0.071|0.06}}

| period = {{val|1935|30|27|ul=d}}
{{val|5.297|0.082|0.073|ul=yr}}

| inclination = {{val|71|13|u=deg}} or {{val|109|13|u=deg}}

| asc_node = {{val|141|19|u=deg}}

| avg_speed = 16.6

| time_periastron = {{val|2456730|50|44}}

| arg_peri = {{val|168.5|4.1|5.0|u=deg}}

| semi-amplitude = 92 ± 65

| star = HD 142022 A

| physical_ref =

| mass = {{val|4.51|0.91|0.61|ul=Jupiter mass}}

}}

HD 142022 Ab is an exoplanet discovered by the radial velocity method by Eggenberger et al. in 2005, after finding that HD 142022 A is wobbling which indicated the presence of a massive planet, with a minimum mass 4.5 times Jupiter. It has a relatively wide separation between the planet and the star of nearly 3 AU, and takes 1928 days or 5.28 years to revolve. As is common for long-period planets, it has a relatively high eccentricity of 53±20%. In 2023, the inclination and true mass of HD 142022 Ab were determined via astrometry.