With q = ( 4.09 \pm 0.27 ) \times 10 ^ { -5 } , KMT-2019-BLG-0842Lb is the second cold planet with planet-host mass ratio q below that of Uranus relative to the Sun ( q = 4.37 \times 10 ^ { -5 } ) , the first having been discovered only in 2018 .
Hence , such cold , sub-Uranus-ratio planets are probably not rare .
We discuss possible improvements in the search for these planets .
The Bayesian estimates for the host mass , planet mass , system distance , and planet-host projected separation are M _ { host } = 0.76 \pm 0.40 M _ { \odot } , M _ { planet } = 10.3 \pm 5.5 M _ { \oplus } , D _ { L } = 3.3 \pm 1.3 { kpc } , and a _ { \perp } = 3.3 \pm 1.4 { AU } , respectively .
The blended light is plausibly due to the host star , an identification that could be tested by high resolution images taken during the next ( 2020 ) bulge season .