TRAPPIST-1d
TRAPPIST-1d , also designated as 2MASS J23062928-0502285 d , is a small exoplanet ( about 30% the mass of the earth ) , which orbits on the inner edge of the habitable zone of the ultracool dwarf star TRAPPIST-1 approximately 40 light-years ( 12 . 1 parsecs , or nearly km ) away from Earth in the constellation of Aquarius . 
<triplet> TRAPPIST-1d <subj> exoplanet <obj> instance of <subj> Aquarius <obj> constellation <triplet> TRAPPIST-1 <subj> ultracool dwarf <obj> instance of <subj> Aquarius <obj> constellation