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.
The star is located at an estimated 5700 parsecs (18,591 light years) from the Earth.
[1] MOA-2009-BLG-387 was a gravitational microlensing event detected by the Microlensing Observations in Astrophysics collaboration on July 24, 2009, which searches and documents chance and brief alignments of stars with other stars or objects; such alignments cause a gravitational lens effect, which bends light and causes distorted, but magnified, images that can be interpreted.
[1] The discovery of the planet MOA-2009-BLG-387Lb was published on February 21, 2011 in the journal Astronomy and Astrophysics by the European Southern Observatory.