The European Space Agency’s Solar and Heliospheric Observatory (SOHO) satellite has two coronagraphs known as C2 (narrow field) and C3 (wide field).
C2’s field of view is between 1.5 & 6 solar radii, C3 between 3.7 & 6 solar radii. When viewed from the Earth one solar radii is around 0.25 degrees. Therefore C2 can see objects in the background of solar corona images between 0.375 degrees and 1.5 degrees elongation. C3 0.925 and 7.5 degrees elongation.
When Comet MAPS’s elongation falls to less than 7.5 degrees it should become visible, first in C3 and then in C2. According to the ephemeris on Dominic Ford’s ‘in-the-sky’ website this will be from April 03 to April 06. Of course, Comet MAPS may be destroyed as it approaches, or leaves, perihelion meaning it may not actually be visible between the dates just given.