KMT-2018-BLG-1025Lb: microlensing super-Earth planet orbiting a low-mass star

We aim to find missing microlensing planets hidden in the unanalyzed lensing events of previous survey data. For this purpose, we conduct a systematic inspection high-magnification events, with peak magnifications $A_{\rm peak}\gtrsim 30$, data collected from high-cadence surveys and before 2018 season. From investigation, identify an anomaly light curve event KMT-2018-BLG-1025. The analysis indicates that is caused by very low mass-ratio companion lens. three degenerate solutions, which ambiguity between pair solutions (solutions B) previously known close--wide degeneracy, degeneracy these other solution (solution A) new type has not been reported before. estimated mass ratio planet host $q\sim 0.8\times 10^{-4}$ for A 1.6\times B. Bayesian conducted measured observables, estimate masses distance lens are $(M_{\rm p}, M_{\rm h}, D_{\rm L})\sim (6.1~M_\oplus, 0.22~M_\odot, 6.7~{\rm kpc})$ $\sim (4.4~M_\oplus, 0.08~M_\odot, 7.5~{\rm category super-Earth regardless making eleventh planet, lying those Earth Solar system's ice giants, discovered microlensing.