Quickly, the July 1 Astrophysical Journal Letters (vol. 987 #1) contains:
Sheppard, S. S. Hsieh, H. H. Pokorný, P. et al. Colors and Dynamics of a Near-Sun Orbital Asteroid Family: 2021 PH27 and 2025 GN1 L18 ade3da
Sheppard et al. picked an unusual asteroid “group” (well, two), and report their findings. Asteroids 2021 PH27 and 2025 GN1 have very similar orbits, which generally means they’re related. Either one is a piece of the other, or they’re both pieces of some prior parent body. What’s more, the two make very close passes by the Sun at the innermost points of their orbits (“perihelion”). Do the (coarse, so far) spectra of the two bodies corroborate their common origin, and then, do the spectra tell us something of the composition of two bodies that clearly get irradiated strongly? We have (3200) Phaethon as an example of a near-Sun “asteroid” (or is it actually a faint comet?). And yet, 2021 PH27 and 2025 GN1 do not have the “blue” (-ish) color of Phaethon.
There are subtle differences between the Main Belt, as a population, and the Near-Earth Asteroid population. The rarer near-Sun asteroids, to the extent that we’ve discovered and studied their population, are further intriguing yet.