Also known as MOA 2009-BLG-387b
MOA-2009-BLG-387Lb is an exoplanet in the orbit of the red dwarf MOA-2009-BLG-387L. Its discovery was announced on February 21, 2011, making it the eleventh planet discovered using gravitational microlensing. The planet is thought to be over twice the mass of Jupiter and to have an orbit 80 percent larger than that of Earth's, lasting approximately 1,970 days. However, its exact characteristics are difficult to constrain because the characteristics of the host star are not well known.
MOA-2009-BLG-387Lb is an exoplanet in the orbit of the red dwarf MOA-2009-BLG-387L. Its discovery was announced on February 21, 2011, making it the eleventh planet discovered using gravitational microlensing. The planet is thought to be over twice the mass of Jupiter and to have an orbit 80 percent larger than that of Earth's, lasting approximately 1,970 days. However, its exact characteristics are difficult to constrain because the characteristics of the host star are not well known.
==Characteristics== ===Mass and orbit=== MOA-2009-BLG-387Lb is a gas giant, with an estimated mass 2.6 times that of Jupiter's and a radius of 1.75 times that of Jupiter and an estimated mean distance of 1.8 AU from its host star. It has an orbital period of approximately 1970 days. Although the mass and mean distance of MOA-2009-BLG-387Lb is estimated, the confidence intervals are very large, indicating that there is a large uncertainty present. These uncertainties are largely due to how the exact parameters of the host star are not known.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).