Unusual polarimetric properties of (101955) Bennu: similarities with F-class asteroids and cometary bodies

@article{Cellino2018UnusualPP,
  title={Unusual polarimetric properties of (101955) Bennu: similarities with F-class asteroids and cometary bodies},
  author={A Cellino and Stefano Bagnulo and Irina Belskaya and Apostolos A. Christou},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
  year={2018}
}
We have obtained polarimetric measurements of asteroid (101955) Bennu, a presumably primitive near-Earth object (NEO) that is the target of NASA's sample return mission OSIRIS-REx. During our observing campaign, Bennu was visible from Earth under a wide range of illumination conditions, with phase-angle in the range 16 to 57 degrees. Together with (3200) Phaethon and (152679) 1998 KU2, observed very recently, Bennu is the only existing example of a primitive NEO observed in polarimetric mode… 

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References

SHOWING 1-10 OF 39 REFERENCES
Polarimetric survey of main-belt asteroids II. Results for 58 B- and C-type objects ,
Aims. We present results of a polarimetric survey of main-belt asteroids at Complejo Astronomico el Leoncito (CASLEO), San Juan, Argentina. The aims of this survey are to increase the database of
Polarimetric survey of main-belt asteroids , III. Results for 33 X-type objects
Aims. We present results of a polarimetric survey of main-belt asteroids at Complejo Astronomico El Leoncito (Casleo), San Juan, Argentina. The aims of this survey are to increase the database of
The OSIRIS-REx target asteroid (101955) Bennu: Constraints on its physical, geological, and dynamical nature from astronomical observations
We review the results of an extensive campaign to determine the physical, geological, and dynamical properties of asteroid (101955) Bennu. This investigation provides information on the orbit, shape,
Polarimetric survey of main-belt asteroids. IV. New results from the first epoch of the CASLEO survey
Aims. We present the results of a polarimetric survey of main-belt asteroids at Complejo Astronomico El Leoncito (CASLEO), San Juan, Argentina. The aims of this survey are to increase the database of
The F-type asteroids with small inversion angles of polarization
Polarimetric survey of main-belt asteroids - I. Results for fifty seven S-, L-, and K-type objects
Aims. We present the first results of a polarimetric survey of main-belt asteroids at Complejo Astronomico El Leoncito (Casleo), San Juan, Argentina. The aims of this survey are to increase the
Polarimetry and photometry of the peculiar main-belt object 7968 = 133P/Elst-Pizarro
Context. Photometry and polarimetry have been extensively used as a diagnostic tool for characterizing the activity of comets when they approach the Sun, the surface structure of asteroids,
Significantly high polarization degree of the very low-albedo asteroid (152679) 1998 KU2
We present a unique and significant polarimetric result regarding the near-Earth asteroid (152679) 1998 KU 2 , which has a very low geometric albedo. From our observations, we find that the linear
...
...