There was a 15 Mar issue of Icarus, so maybe that’s why April (vol. 430) is a bit light:
Bettati, A. Lunine, J. Atmospheric escape explains diverse surface compositions of Pluto vs Sedna Article 116482 .2025.116482
Hamm, M. Strauß, M. Grott, M. et al. Low thermal inertia of (162173) Ryugu a result of horizontal cracks in boulders Article 116484 .2025.116484
(134340) Pluto, you are a wily one. First you masquerade as a planet by having a large satellite, inducing us to think you’re both a single, bigger object. Then you warm and cool, inflating and deflating your atmosphere onto ice patches of your surface. Some of those atmospheric components may actually escape, turning you into a giant ‘comet’. (90377) Sedna, significantly further out (thus colder) but also significantly smaller (thus weaker gravity), makes a nice comparison.
When (162173) Ryugu (then called by its provisional name, 1993 JU3) was selected as the target of the Hayabusa2 mission, it touched off an intensive campaign to characterize the body as best we could. The more we could learn, the fewer surprises the probe might encounter. Then once the probe encountered it, with multiple instruments, the more we could learn where ground telescopes function at small bodies, and where their data is off slightly. One of the tricky things to use at a small body is mid-infrared (thermal) observation. Infrared results involve assumptions and simplifications and correction factors; what you see is not what you get. Here, Hamm et al. find a caveat in infrared data from Ryugu: solid rock, including to some extent boulders, should have high thermal inertia. Their bulk conductivity dissipates heat in the day, and retains it at night. Unless, of course, a boulder isn’t a boulder, thermally: cracks are interruptions to conductivity, and will make objects appear to be thermally ‘smaller’.