On the Lunar Origin of Near-Earth Asteroid 2024 PT5 by Theodore Kareta, Oscar Fuentes-Muñoz, Nicholas Moskovitz, Davide Farnocchia, Benjamin N. L. Sharkey

“…We obtained visible and near-infrared reflectance spectra of PT5 with the Lowell Discovery Telescope and NASA Infrared Telescope Facility on 2024 August 16. The combined reflectance spectrum matches lunar samples but does not match any known asteroid types—it is pyroxene-rich, while asteroids of comparable spectral redness are olivine-rich. …”
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Metallicity Dependence of Giant Planets around M Dwarfs by Tianjun Gan, Christopher A. Theissen, Sharon X. Wang, Adam J. Burgasser, Shude Mao

“…All metallicity measurements are homogeneously obtained through the same methodology based on the near-infrared spectra collected with a single instrument SpeX mounted on the NASA Infrared Telescope Facility. We find that (1) giant planets favor metal-rich M dwarfs at a 4 σ –5 σ confidence level, depending on the band of spectra used to derive metallicity; (2) hot ( a / R _* ≤20) and warm ( a / R _*  > 20) Jupiters do not show a significant difference in the metallicity distribution. …”
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