HD 216770 b is an extrasolar planet

Extrasolar planet

An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...

 orbiting the star HD 216770

HD 216770

HD 216770 is an 8th magnitude star located approximately 124 light-years away in the constellation of Piscis Austrinus. It is an orange dwarf , and is somewhat dimmer and cooler than our Sun....

. It has a mass about two thirds that 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,...

, largest planet in our Solar system

Solar System

The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The vast majority of the system's mass is in the Sun...

. But unlike the gas giant

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...

s in the Solar system, it orbits in a very eccentric orbit around the star. The mean distance from the star is slightly larger than Mercury's

Mercury (planet)

Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits...

, and it completes one orbit around the star in every 118 day

Day

A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun...

s.

See also

• HD 10647 b
  HD 10647 b
  HD 10647 b, also catalogued as q1 Eridani b, is an extrasolar planet approximately 57 light-years away in the constellation of Eridanus . The planet is a mid-Jovian that orbits 103% farther from the star than Earth to the Sun. It takes about 33 months to orbit with semi-amplitude of 17.9 m/s.-...
  
  
• HD 108874 b
  HD 108874 b
  HD 108874 b is a gas giant announced in 2003. The orbit lies in the star's habitable zone. It is expected that any moons orbiting this planet are enriched in carbon, and are thus quite different from the silicate-rich bodies in our Solar System....
  
  
• HD 111232 b
  HD 111232 b
  HD 111232 b is an extrasolar planet that orbits almost 2 AU with a mass of at least 6.8 times that of Jupiter. This planet was discovered in the La Silla Observatory by Michel Mayor using the CORALIE spectrograph on 30 June 2003, along with six other planets, including HD 41004 Ab, HD 65216 b, HD...
  
  
• HD 142415 b
  HD 142415 b
  HD 142415 b is an exoplanet with the semi-amplitude of 51.3 ± 2.3 m/s. This indicates the minimum mass of 1.69 Jupiter mass, an orbital period of 386.3 days, and the semi-major axis of 1.07 astronomical units based from its stellar mass...
  
  
• HD 169830 c
  HD 169830 c
  HD 169830 c is an extrasolar planet, most likely a gas giant, three and a half times as massive as Jupiter. It is likely to be smaller in radius but slightly larger than Jupiter. Its orbit is eccentric, with a period of 1830 days....
  
  
• HD 41004 Ab
  HD 41004 Ab
  HD 41004 Ab is an extrasolar planet approximately 139 light years away in the constellation of Pictor. It has mass 2.56 MJ planet orbiting at a distance of 1.70 AU from HD 41004 A. The planet's orbit is highly eccentric caused by the companion star HD 41004 B and the distance ranges from 0.44 to...
  
  
• HD 65216 b
  HD 65216 b
  HD 65216 b is an extrasolar planet located approximately 116 light-years away in the constellation of Carina, orbiting the star HD 65216. This planet was discovered by the Geneva Extrasolar Planet Search Team in 2003. Like most planet candidates so far, it was detected with the radial velocity...