The OGLE-2017-BLG-0173L system contains 1 exoplanet. It is located 15345.64 light years away from the solar system.
| Mass | 0.4 solar masses |
| Radius | 0.32 solar radiae |
| Temperature | - kelvin |
| Stellar Metallicity | - decimal exponent |
| Age | - billion years |
At 3.272 Earth masses, OGLE-2017-BLG-0173L b is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes. With a mass below 5 Earth masses, and a semi-major axis of 3.913 astronomical units, which is outside the habitable zone of OGLE-2017-BLG-0173L, OGLE-2017-BLG-0173L b is likely an icy world.
| Mass | 3.269 Earth masses |
| Density | 4.230 grams per cubic centimeter |
| Radius | 1.620 Earth radiae |
| Semi-major Axis | 3.913 AU |
| Eccentricity | NaN |
| Orbital Period | NaN days |
| Discovery Method | Microlensing |
| Discovery Facility | OGLE |
| Discovery Telescope | 1.3 m Warsaw University Telescope |
| Discovery Instrument | OGLE CCD Array |
| Discovery Date | 2018-01 |
| Reference | Hwang et al. 2018 |