K2-148b
K2-148b is a confirmed Super-Earth, probably rocky, closely orbiting a small orange dwarf star. It is the innermost of three Super-Earths around the star K2-148, which is in a wide binary pair with the M0.5V red dwarf EPIC 220194953. K2-148b is the smallest planet of the system, at about a third larger than Earth, and could be terrestrial in nature. However, the three planets do not exhibit significant transit timing variations, implying that they could have relatively low masses. The planet was validated in early 2018 by Hirano "et al." and is too hot for known life.
List of transiting exoplanets
The most massive transiting exoplanet is KELT-1b which masses 27.23 M (making it a brown dwarf) while the least massive is Kepler-42d which masses less than 0.003 M or 0.9 M. The largest exoplanet known is HAT-P-32b which is 2.037 R. The smallest exoplanet known is also Kepler-42d which is 0.051 R or 0.57 R. The densest transiting exoplanet known is COROT-3b, which has density of 26.4 g/cm; the diffusest transiting planet known is Kepler-12b, which has density of only 0.111 g/cm. The longest period of any transiting planets is Kepler-1647b, which takes 1107 days to orbit its (double) stars. The shortest period is Kepler-42c, which takes just 0.45 days to orbit its star