Mersereau 2012 A is a rogue planet, discovered by Alex Mersereau. It is most likely an extra solar object.
OCESS has conducted to Jupiter's Lagrange points to conduct studies on this object, including parallax and blueshift measurements. The 2013 mission had M-2012-A as the main destination.
A mission is currently being conducted to place an observation post in Jupiter's L2 point. Once this has been completed, parallax observations may be made
Calculations are currently being performed on Mersereau 2012 A to determine its blueshift, using the AYSE telescope