Contours represent the e-MERLIN 5.2 cm image of Betelgeuse obtained in 2012 with levels set at (5,10,15,...,70) × σ_rms (where σ_rms = 9 μJy). The e-MERLIN restoring beam is shown in the bottom left corner, while the restoring beams of our 2004 epoch data at 0.7 cm, 1.3 cm, and 2.0 cm are shown at the top left for comparison. The red filled circle is the scaled photosphere at the 2012 position predicted by the astrometric solution of Harper et al. (2008). The blue, green, and orange ellipses are the derived sizes of the atmosphere at 0.7 cm, 1.3 cm, and 2.0 cm, respectively, for the 2004 epoch. The combined positional uncertainty is 28 mas.