09 Piscium – a Binary or Multiple Star System

09 Piscium is a variable giant star in the Pisces constellation. It is a yellow-hued G-type main-sequence star 108 light-years away in the zodiac constellation Pisces. It is not part of the Pisces constellation outline, but it is within its boundaries. With an apparent visual magnitude of 6.27, it is near the lower limit of visibility to the naked eye. With a heliocentric radial velocity of -45.5 km/s, the star is getting closer to Earth. It is home to one known exoplanet. The star is visible to the naked eye, which means you don’t need a telescope or binoculars to see it.

09 Piscium is a star system with multiple stars. This Sun-like star has a stellar classification of G3 Va and a 91 percent larger radius than the Sun. It is 6.75 billion years old, has a higher iron abundance, and has a low projected rotational velocity of 1.3 km/s. At an effective temperature of 5,442 K, the star emits 2.9 times the luminosity of the Sun from its photosphere.

Pisces is the 14th largest constellation, covering an area of 889 square degrees. It’s one of the fifteen equatorial constellations. It can be seen at latitudes ranging from +90° to -65° in the northern hemisphere’s first quadrant (NQ1). Andromeda, Aquarius, Aries, Cetus, Pegasus, and Triangulum are the nearby constellations.

Pisces belongs to the Zodiac family of constellations, along with Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpius, Sagittarius, Capricornus, and Aquarius.

Planetary system

The discovery of an extrasolar planet orbiting this star was announced on November 1, 1999. The planet has a minimum mass that is more than six times that of Jupiter and orbits its parent star in just under three years. Because it is close to the celestial equator, it is visible from both hemispheres at different times of the year.

The star rotates with an inclination of 69+21-26 degrees to Earth. This planet is most likely inclined in the same way. The visual magnitude of 09 Piscium is 6.25. Because of its relative faintness, 9 Piscium should be visible only from locations with dark skies, and it should be invisible from light-polluted skies.

The estimated radius of 9 Piscium has been calculated to be 9.31 times larger than the Sun. The radius of the Sun is 695,800km, so the radius of the star is estimated to be 6,478,670.77km. If you need the diameter of the star, simply multiply the radius by two. The radius, however, is now calculated to be around 8.45 with the 2007 release of updated Hipparcos files.