The April “issue” (part of vol. 529, billed as three issues) of MNRAS (Royal Astronomical Society’s journal) isn’t complete; issue #3 is still in progress. I’ll go ahead and cite the first two:
Vol. 529, #2:
Sun, S. Shi, J. Ma, Y. Distant activity of long-period comets C/2019 L3 (ATLAS) and C/2020 … p. 1617 stae577
Vol. 529, #3:
Massa, G. Palomba, E. Longobardo, A. Search and study for meteorites analogous to Didymos p. 2008 stae635
Davidsson, B. J. R. Cliff collapse on Comet 67/Churyumov–Gerasimenko – II. Imhot… p. 2258 stae657
Müller, D. R. Altwegg, K. Berthelier, J.-J. Deciphering cometary outbursts: linking gas composi… p. 2763 stae622
Stephenson, P. Galand, M. Deca, J Cold electrons at a weakly outgassing comet p. 2854 stae695
Comets galore, including weak ones and artificial ones (the DART target- talk about high activity). And meteorites, being fragments of some prior body, are of course lines of investigation. In the case of Didymos/Dimorphos, having both a sample in hand, and characterization of its prior parent, would turn the line into a closed loop- synergistic observations. But only if we can make the connection.
Regarding weak comets, we can speculate on lots of volatile emissions besides water. When distant from the Sun, such emissions are the so-called supervolatiles- light organics, carbon dioxide, some nitro-compounds, etc. Closer in, we see sulfur and sodium loss. Given the failure of Rosetta to close its emission investigation, this is not a closed-loop line of research. Meanwhile, DESTINY+ is due to launch towards (3200) Phaethon. (And, if possible, a mission extension to 2005 UD. The other Phaethon-family active asteroid.)