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Evidence of surface heterogeneity on active asteroid (3200) Phaethon

Granvik, Mikael; MacLennan, Eric; Marshall, Sean

Thermal infrared emission and thermophysical modeling techniques are powerful tools in deciphering the surface properties of asteroids. The near-Earth asteroid (3200) Phaethon is an active asteroid with a very small perihelion distance and is likely the source of the Geminid meteor shower. Using a thermophysical model with a non-convex shape of Ph…

Simulated SPHEREx spectra of asteroids and their implications for asteroid size and reflectance estimation

Doré, Olivier; Ivezić, Željko; Ivezić, Vedrana +6 more

We describe the construction and analysis of simulated SPHEREx spectra of Main Belt and Trojan asteroids. SPHEREx will deliver the first all-sky spectral survey at 96 spectral channels between 0.75 µm and 5.0 µm. We have developed a method for correcting SPHEREx asteroid spectra for intrinsic rotational variability that does not requir…