eROSITA X-ray mosaic as in Fig. 1. The estimated shell extent of the Monogem Ring SNR is shown in dashed white, if assuming a single structure at D = 300 pc. The cyan circle highlights the darker interior of the remnant which was excluded for estimating the SNR properties, therefore only using the limb-brightened shell in an annulus. The current position of PSR B0656+14 is shown in yellow.