More papers from Planetary Science Journal (2025, vol. 6):
M. Darby Dyar, Breitenfeld, L. B. Lane, M. D. et al. Spectroscopy of the Hamburg Meteorite, Michigan H4 240 ae0a4f
Bair, A. N. Schleicher, D. G. Comprehensive Analyses of the Strongly Carbon-chain Depleted Comets in Lowell Observatory’s Narrowband Photometry Database 248 ae0369
Daca, A. et al. The Caltech Mission to Apophis: Accelerating Planetary Science and
Planetary Defense 253 ae0caf
Shackelford, A. N. et al. Space Weathering on Carbon-rich Surfaces: Spectral Characterization of Fe-poor Mercury and Carbonaceous Asteroid Analogs 254 ae1131
Sakai, N. et al. Detection of OH Maser Emission in the 71 yr Periodic Comet 12P/Pons-
Brooks Using the 40 m Thai National Radio Telescope 261 ae0e19
DeMartini, J. V. et al. The Influence of Internal Structure on Physical Outcomes of the 2029 Apophis Close Approach with Earth 263 ae147e
Meteorites: now known to be pieces of asteroids, and thus the building blocks of planets. H Chondrite meteorites are from the inner Solar System- less volatile-rich and immediately interesting than carbonaceous chondrites, but puzzle pieces of System history nonetheless. Spectroscopy of them gets us closer to identifying parent-child relationships among asteroids.
We can barely see details of comet nuclei from the ground… but we can, in spectroscopes, make out many chemical ingredients. Bair et al. try their hand in one archive of comet spectrographs.
Apophis: making its stage entrance in just over three years now. Caltech doesn’t intend to miss the show, as Daca et al. give. Good luck, beaver team!
We see space weathering on rocks from Earth’s natural satellite, some asteroids, and arguably Mercury. But carbonaceous chondrites are made of different stuff, and don’t weather like ordinary chondrites (the S-complex asteroids). Shackelford et al. tackle this rich subfield.
We can barely see comet nuclei in ground telescopes… in the optical. But many of the chemical ingredients have spectral features in radio/millimeter bands. The Thai Radio Telescope is one observatory working in those bands.
Like Daca and Caltech, many are anticipating the Apophis flyby (NOT impact) as a natural experiment in geo(?)physics. DeMartini et al. hypothesize the current state of Apophis, the ‘before’ picture to compare with post-flyby data.