HD 143361 is a star in the southern constellation Norma. With an apparent visual magnitude of 9.20, this star is too dim to be seen with the naked eye. It is close enough to the Earth that its distance can be determined using parallax measurements, yielding a value of 224abbr=offNaNabbr=off.
This is a G-type main sequence star with a stellar classification of G6 V. It has around 95% of the Sun's mass and is around 8.1 billion years old.
HD 143361 may be a binary star, a red dwarf star has a similar distance and similar proper motions with the primary. If gravitationally bound to HD 143361, the orbit is very wide, as the angular separation of 33 arcminutes translates to a projected separation of 135000abbr=inNaNabbr=in.
In October 2008 the exoplanet HD 143361 b was reported to be orbiting this star. This object was detected using the radial velocity method during an astronomical survey conducted by the Magellan Planet Search Program using the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope. In 2023, the inclination and true mass of HD 143361 b were determined via astrometry.