HD 155358 b
Encyclopedia
HD 155358 b is a gas giant
planet
that orbits the star HD 155358
, located 142 light years away in the constellation Hercules
. This planet orbits at a distance about 63% of distance between Earth
and the Sun
and has a moderate eccentricity. The planet mass is at least 89% of Jupiter
, depending on inclination
of the orbit
and true mass
of the star. It takes over half a year to orbit the star.
Gas giant
A gas giant is a large planet that is not primarily composed of rock or other solid matter. There are four gas giants in the Solar System: Jupiter, Saturn, Uranus, and Neptune...
planet
Planet
A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...
that orbits the star HD 155358
HD 155358
HD 155358 is a low metallicity yellow dwarf star approximately 43 light years away in the constellation Hercules. This star is known to be orbited by two extrasolar planets.The star is 11.9 billion years old and has a mass 0.89 times that of the Sun...
, located 142 light years away in the constellation Hercules
Hercules (constellation)
Hercules is a constellation named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations today...
. This planet orbits at a distance about 63% of distance between Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
and the Sun
Sun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...
and has a moderate eccentricity. The planet mass is at least 89% of Jupiter
Jupiter
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...
, depending on inclination
Inclination
Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...
of the orbit
Orbit
In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System...
and true mass
True mass
The term true mass is synonymous with the term mass, but is used in astronomy to differentiate the measured mass of a planet from the lower limit of mass usually obtained from radial velocity techniques...
of the star. It takes over half a year to orbit the star.