The January Astronomy & Astrophysics (vol. 705) still says ‘in progress’. But it’s February, and the February issue is posting articles. So here’s Jan anyway:
Serra-Ricart, M. Licandro, J. Alarcon, M. R. Pre-perihelion detection of a wobbling high-latitude jet in the interstellar comet 3I/ATLAS L3 202558072
Delbo, M. Avdellidou, C. Galinier, M. et al. Gaia and IRTF abundance of A-type main-belt asteroids A46 202556827
Vander Donckt, M. Jehin, E. Aravind, K. et al. Photometric and spectroscopic monitoring of the outbursting Halley-type comet 12P/Pons-Brooks A89 202556202
Mahlke, M. Marsset, M. Devogèle, M. et al. Two faces of L-type asteroids – Evidence from UV-VisNIR spectra and CO/CV chondrites A121 202555785
Mariani, V. Fienga, A. Murray, Z. et al. Boosting decision trees for the selection of main belt asteroids in planetary ephemerides: An alternative model A189 202555476
Shober, P. M. Vaubaillon, J. Anghel, S. et al. Comparing the data-reduction pipelines of FRIPON, DFN, WMPL, and AMOS: Case study of the Geminids A65 202554364
Serra-Ricart I had already covered as a preprint. Here’s the ‘print’.
Delbo et al. attempt to track down the A-type (olivine-rich) asteroids, using the GAIA telescope. These once-molten asteroids may tell us of the history of the Solar System, when there were large asteroids (small planets?) not yet broken apart by mega-impacts.
That Comet Pons-Brooks, what a show. Multiple papers have been published on it. Here’s another.
In keeping with Delbo, we are trying to connect meteorites with their parent asteroids, and thus, the recent history of asteroid fragmentation. One lead is that L-asteroids may be the parents of CV chondrite meteorites, among others. Are they? Mahlke et al. are on it.
Speaking of collisions and fragmentation, we are tracking asteroids for multiple reasons. Some are hazardous risks to Earth, and some are ‘merely’ large bodies, with nontrivial gravity. Spacecraft tracking is so precise, we actually account for large asteroids in our models of Solar System gravity and trajectories. This is no small task: where do you cut off ‘large’ (significant) asteroids, vs. the rest? Mariani et al. apply machine learning to the problem of planetary tracking.
On the other end of the trajectory is inbound meteors. And of course, some of those meteors (like the Geminids) are fragments from asteroids, not comets. Shober et al. go a bit meta, trying to sharpen our tools on meteor tracking and fragments of asteroid (3200) Phaethon.