Near-infrared spectroscopy of the Sulamitis asteroid family: Surprising similarities in the inner belt primitive asteroid population

1Anicia Arredondo,1Humberto Campins,2Noemi Pinilla-Alonso,3,4Juliade León,5,3Vania Lorenzi,3,6David Morate
Icarus (in Press) Link to Article [https://doi.org/10.1016/j.icarus.2020.114210]
1Physics Department, University of Central Florida, P.O. Box 162385, Orlando, FL 32816, USA
2Florida Space Institute, University of Central Florida, Orlando, FL 32816, USA
3Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain
4Departamento de Astrofísica, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain
5Fundación Galileo Galilei – INAF, La Palma (TF), Spain
6Observatório Nacional, Coordenação de Astronomia e Astrofísica, 20921-400 Rio de Janeiro, Brazil
Copyright Elsevier

We present NIR spectra of 19 asteroids in the Sulamitis family as part of our survey of primitive inner belt asteroid families. The spectra were obtained with NASA’s Infrared Telescope Facility and the Telescopio Nazionale Galileo between January 2017 and February 2020. We find spectral homogeneity in our sample despite the diversity within the family observed at visible wavelengths. The average Sulamitis spectrum is flat with a spectral slope of 0.89 ± 0.26%/1000 Å between 0.95 and 2.3 μm. We show that the Sulamitis family is spectrally similar to other inner belt families in the NIR, despite differences between families seen in the visible wavelength range. We also compare our obtained spectra with asteroids (101955) Bennu and (162173) Ryugu to show that the Sulamitis family is a plausible source of Ryugu.

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