Europlanet Science Congress 2021
Virtual meeting
13 – 24 September 2021
Europlanet Science Congress 2021
Virtual meeting
13 September – 24 September 2021
EPSC Abstracts
Vol. 15, EPSC2021-47, 2021
European Planetary Science Congress 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Polarimetric properties of asteroids in the near-infrared

Joseph Masiero1, Karri Muinonen2, Samaporn Tinyanont3, and Maxwell Millar-Blanchaer4
Joseph Masiero et al.
  • 1Caltech/IPAC, Pasadena, United States of America (
  • 2University of Helsinki, Finland
  • 3University of California Santa Cruz, USA
  • 4University of California Santa Barbara, USA

We present first results from a polarimetric survey of asteroids in the near-infrared J and H bands (1.25 and 1.65 microns, respectively). This survey has been enabled by the newly commissioned WIRC-Pol instrument on the Palomar 5 m telescope.  WIRC-Pol simultaneously senses the four linear polarization components from the target, while using a half-wave plate to beam swap between them. This setup allows us to obtain bandpass polarimetric accuracies better than 0.1% for our targets.  WIRC-Pol also obtains low resolution spectra of each Stokes component, allowing us to investigate the spectropolarimetric properties of our targets as a function of phase.  We show polarimetric phase curves for objects that have been sampled at multiple phases, our initial spectropolarimetric findings, and discuss the results from modeling these observations. 

How to cite: Masiero, J., Muinonen, K., Tinyanont, S., and Millar-Blanchaer, M.: Polarimetric properties of asteroids in the near-infrared, European Planetary Science Congress 2021, online, 13–24 Sep 2021, EPSC2021-47,, 2021.

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