Characteristics TRAPPIST-1g

1 characteristics

1.1 mass, radius, , temperature
1.2 host star
1.3 orbit

characteristics
mass, radius, , temperature

trappist-1g earth-sized exoplanet, meaning has mass , radius close of earth. has equilibrium temperature of 198.6 k (−75 °c; −102 °f). planet has mass of 1.34 earth masses , radius of 1.13 r☉, resulting in estimated surface gravity of 10.3 m/s , density of 5.13 g/cm, both similar earth.

host star

the planet orbits (m-type) ultracool dwarf star named trappist-1. star has mass of 0.08 m☉ , radius of 0.11 r☉. has temperature of 2550 k , @ least 500 million years old. in comparison, sun 4.6 billion years old , has temperature of 5778 k. star metal-rich, metallicity ([fe/h]) of 0.04, or 109% solar amount. particularly odd such low-mass stars near boundary between brown dwarfs , hydrogen-fusing stars should expected have considerably less metal content sun. luminosity (l☉) 0.05% of of sun.

the star s apparent magnitude, or how bright appears earth s perspective, 18.8, dim seen naked eye.

orbit

trappist-1g orbits host star orbital period of 12.353 days , orbital radius of 0.0451 times of earth s (compared distance of mercury sun, 0.38 au). in outer limit of trappist-1 s habitable zone. orbit of trappist-1g has eccentricity of 0.003, lower of earth , similar of trappist-1e. orbit varies 41,000 kilometers (compared 5 million km earth), making planet s climate stable. in 3:2 orbital resonance trappist-1h , 3:4 resonance trappist-1f.