109 Piscium is a yellow hued G-type main-sequence star, located around 106 light years away from Earth in the constellation Pisces. 109 Piscium has a similar mass to our Sun, having about 1.11 times the Sun's mass, but having 1.91 times the Sun's radius, or about a 91% largre radius, and has a higher abundance of iron. It is approximately 6.75 billion years old.
The star is moving closer to the Earth with a heliocentric radial velocity of -45.5 km/s. It has known exoplanet that was discovered in 1999.
Planetary system[]
On Nevember 1, 1999, an extrasolar planet orbiting the star was announced. The planet is a gas giant with a minimum mass of more than 6 times that of Jupiter.
| Planet | Mass | Semimajor axis | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >6.38 Jupiter mass | 2.16 AU | 1076.4 days | 0.1023 | N/A | N/A |
In popular culture[]
In the 1983 Star Trek novel The Wounded Sky, the USS Enterprise intentionally causes 109 Piscium to go supernova, by entering warp drive too close to the star, in order to destroy a group of pursuing Klingon vessels.