HD 196050
# HD 196050

HD 196050 is a triple star system located in the southern constellation of Pavo. This system has an apparent magnitude of 7.50 and the absolute magnitude is 4.01. It is located at a distance of 165 light-years (51 parsecs) from the Sun based on parallax, and is drifting further away with a radial velocity of +61 km/s. It is also called by the Hipparcos designation HIP 101806.

## Characteristics

The primary component is a G-type main-sequence star with a stellar classification of G3V. It has a quiescent chromosphere and does not appear to be variable. The star has 18% more mass than the Sun and a 46% greater size. It is around 2.5 billion years old with a higher than solar metallicity, and is spinning with a projected rotational velocity of 3 km/s. The star is radiating 2.21 times the luminosity of the Sun from its photosphere at an effective temperature of 5,834 K.

A faint co-moving companion star, designated component B, was detected based on observations during 2003–2004, located 10.80″ to the south of the primary component. This corresponds to a projected separation of 7,511±22 AU. The star is magnitude 10.62 A third companion, component C, was discovered in 2007, located about 0.4″ from component B. It has a visual magnitude of 15.6.

## Planetary system

In 2002, the Anglo-Australian Planet Search team announced the discovery of an extrasolar planet orbiting the star. The discovery was independently confirmed by the Geneva Extrasolar Planet Search team. In 2023, the inclination and true mass of HD 196050 b were determined via astrometry.

The HD 196050 planetary system :

| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (years) | Eccentricity | Inclination | Radius |
| - | - | - | - | - | - | - |
| b | 4.55+0.69 −0.72 $M_J$ | 2.585+0.032 −0.035 | 3.813+0.026 −0.024 | 0.178±0.011 | 41.0+10.0 −6.3 or 139.0+6.3 −10.0° | — |
