· · · ·
Proper NameNone
DesignationsTRAPPIST-1 d, 2MASS J23062928-0502285 d, K2-112 d, EPIC 246199087 d
ClassificationEarth-mass planet
Orbital Period4 days, 1 hour
Mean Distance from TRAPPIST-13.34 million km
0.02 AU
Mass0.40 x Earth
Diameter0.77 x Earth
Temperature288 K (15°C)
Parent starTRAPPIST-1, red dwarf star in Aquarius
Other planets in this system TRAPPIST-1 b, Earth-mass planet
TRAPPIST-1 c, Earth-mass planet
TRAPPIST-1 e, Earth-mass planet
TRAPPIST-1 f, Earth-mass planet
TRAPPIST-1 g, Earth-mass planet
TRAPPIST-1 h, Earth-mass planet
NotesThe third of the seven known planets in orbit around the red dwarf TRAPPIST-1 in Aquarius. TRAPPIST-1 d is a low-mass terrestrial planet (it has less than half the mass of Earth, and only the outer planet TRAPPIST-1 h has a comparably low mass within its system). Like all of TRAPPIST-1's planets, TRAPPIST-1 d follows a very close, rapid orbit around its star, and so the planet's 'year' lasts a little over four days.

Imagery provided by Aladin sky atlas


Related Entries