52nd Lunar and Planetary Science Conference 2021 (LPI Contrib. No. 2548) 1535.pdf SPECTROSCOPIC SURVEY OF THE INNER BELT PRIMITIVE BACKGROUND POPULATION. A. Arredondo1, H. Campins1, N. Pinilla-Alonso2, J. de León3,4, V. Lorenzi3,5, D. Morate6, Juan Luis Rizos3,4, Mário De Prá2, 1 University of Central Florida (
[email protected]), 2 Florida Space Institute, 3 Instituto de Astrofísica de Canarias, 4 Universidad de La Laguna, 5 Fundación Galileo Galilei - INAF, 6 Observatório Nacional, Coordenação de Astronomia e Astrofísica. Introduction: Near-Earth asteroids (NEAs) are locations of the families. Furthermore, the sizes of main belt asteroids whose orbits have been perturbed by background asteroids are correlated with eccentricity gravitational interactions with planets so that they now but anti-correlated with inclination [3]. This evidence orbit in the vicinity of Earth. To study the main belt suggests that family and background asteroids origins of NEAs, and particularly the origins and likely originated from a few large primordial planetesimals. compositions of (101955) Bennu and (162173) Ryugu, In this study, we test if the background is similar or the PRIMitive Asteroid Spectroscopic Survey different from the families in the same region by (PRIMASS) was formed. Bennu and Ryugu likely spectrally characterizing the primordial background formed from primitive (pV < 0.15), low inclination population and comparing our results with the (i < 8°) asteroid populations in the inner main belt population of primitive IMB families already observed (IMB) [1]. A population that is capable of delivering and published by PRIMASS. NEAs but has not been studied extensively before is the Observations: We obtained a representative background population, i.e., asteroid that have not been sample of the background population by observing classified into dynamical families by [2].