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Groombridge 1618

 

Groombridge 1618 is a planetary system orbiting a orange K-class star.  The system lies in the Ursa Major Constellation of the Inner/Sol Region.

 
The Groombridge 1618 system was first explored by Sol based settlers looking to colonize worlds during the early days of interstellar travel.  Numerous groups over the years tried unsuccessfully to colonize the cold, partially habitable primary planet.

 

Eventually a permanent population was able to take hold on the planet.  Though the world had little to offer and never gained a population larger than a few million.  Used primarily for mining, most of the planet's resources have been shipped off world.

System: Groombridge 1618

Primary Star: HD 88230

Stellar Type: K7Ve ☼

Mass (Sol): 0.67

Luminosity: 0.05x Sun

Distance: 15.85 ly

Constellation: Ursa Major

Region: Inner/Sol

Population: 6 Million

 

       
Groombridge 1618 Planets
       

Groombridge 1618 B
Groombridge 1618 B is relatively cold world orbiting on the outside edge of the habitable zone.  The planet is partially habitable with a limited amount of free oxygen in the atmosphere, the oxygen is created by melting ice on the surface.

Distance: 0.34 AU

Orbit: 89 days

Temp: 220 K

Mass: 0.34 Earth

Radius: 4871 km

Gravity: 0.58 g

Rotation: 20 hours

Moon(s): 1

       
       

Groombridge 1618 C
Groombridge 1618 C is a small gas giant with around a third of Jupiter's mass.  The planet has a hydrogen atmosphere with cloud bands consisting of neon and krypton.

Distance: 4.44 AU

Orbit: 11.4 years

Temp: 62 K

Mass: 0.32 Jupiter

Radius: 41622 km

Gravity: 2.36 g

Rotation: 18 hours

Moon(s): 12

       
       


Closest Inhabited Systems:

 

Name

Distance (ly)

Type

AD Leonis

8.13

M3V

Wolf 359

11.52

M6V

Chara

14.79

G0V

Sol

15.85

G2V

Alsafi

16.83

K0V

Alpha Centauri

18.57

K0V

Epsilon Eridani

20.96

K2V

Vega

27.4

A0V





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