Polana Archives

Offset comparison between the JWST spectral repository of PEC asteroids

The Polana-Eulalia Complex with JWST NIRSpec: Connections to Bennu, Ryugu, and Outer Solar System Bodies

by Keith CowingJuly 22, 2026July 22, 2026

[astro-ph.EP] Carbon rich [C complex] asteroids provide insight into the early Solar System, and families of C complex asteroids serve as robust samples for learning about the internal structure of […]

Observed SFDs of C-type asteroid families. The SFDs usually exhibit a steep slope q1 at sizes D ≳ 5 km and a shallow slope q2 at D ≲ 5 km. This break is often created in the course of collisonal evolution. An observational bias affects the SFDs at even smaller sizes (0.5-3 km), depending on the distance and albedo of the respective populations. Additionally, families of P, B and M types were studied (together with 4 of unknown taxonomical classification). -- astro-ph.EP

Astrochemistry, Astrogeology, Comets and Asteroids, Impact events, Meteorites & Asteroids, Status Report

Source Regions of Carbonaceous Meteorites and NEOs

by Keith CowingJuly 3, 2024July 1, 2024

The present work aims to determine the source regions of carbonaceous chondrites (CM, CI, CO, CV, CK, CR, CH, CB, or C-ungrouped). We studied 38 individual asteroid families, including young […]