This has been on the bucket list for a while, and the seeing was good enough last Wednesday morning. I've never seen surface features on Mercury before, but several showed up here in my IR image (left), compared to a planetarium view (right). The dark-ringed, bright centred basin Tolstoy is near the limb, and bright areas, Nureyev (crater), Qi Baishi (basin rim) and Caloris Planitia are all discernible. Not sure when I'll be this lucky again!
https://photos.app.goo.gl/R1hE18kYjPy14yWu9