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Physical Characteri...
Physical Characterization of 2015 JD1: A Possibly Inhomogeneous Near-Earth Asteroid
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- López-Oquendo, Andy (författare)
- Department of Astronomy and Planetary Science, Northern Arizona University, Flagstaff, AZ 86011, USA
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- Trilling, David E. (författare)
- Department of Astronomy and Planetary Science, Northern Arizona University, Flagstaff, AZ 86011, USA
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- Gustafsson, Annika (författare)
- Department of Astronomy and Planetary Science, Northern Arizona University, Flagstaff, AZ 86011, USA; Southwest Research Institute, Boulder, CO 80302, USA
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- Virkki, Anne (författare)
- Arecibo Observatory, University of Central Florida, Arecibo, PR 00612, USA; Department of Physics, P.O. Box 64, FI-00014, University of Helsinki, Finland
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- Rivera-Valentín, Edgard G. (författare)
- Lunar and Planetary Institute, Universities Space Research Association, Houston, TX 77058, USA
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- Granvik, Mikael (författare)
- Luleå tekniska universitet,Rymdteknik,Department of Physics, P.O. Box 64, FI-00014, University of Helsinki, Finland
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- Chandler, Colin Orion (författare)
- Department of Astronomy and Planetary Science, Northern Arizona University, Flagstaff, AZ 86011, USA
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- Chatelain, Joseph (författare)
- Las Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA
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- Taylor, Patrick (författare)
- Lunar and Planetary Institute, Universities Space Research Association, Houston, TX 77058, USA
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- Fernanda-Zambrano, Luisa (författare)
- Arecibo Observatory, University of Central Florida, Arecibo, PR 00612, USA
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(creator_code:org_t)
- Institute of Physics Publishing (IOPP), 2022
- 2022
- Engelska.
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Ingår i: The Planetary Science Journal. - : Institute of Physics Publishing (IOPP). - 2632-3338. ; 3:8
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The surfaces of airless bodies such as asteroids are exposed to many phenomena that can alter their physical properties. Bennu, the target of the OSIRIS-REx mission, has demonstrated how complex the surface of a small body can be. In 2019 November, the potentially hazardous asteroid 2015 JD1 experienced a close approach of 0.033 1 au from the Earth. We present results of the physical characterization of 2015 JD1 based on ground-based radar, spectroscopy, and photometric observations acquired during 2019 November. Radar polarimetry measurements from the Arecibo Observatory indicate a morphologically complex surface. The delay-Doppler images reveal a contact binary asteroid with an estimated visible extent of ∼150 m. Our observations suggest that 2015 JD1 is an E-type asteroid with a surface composition similar to aubrites, a class of differentiated enstatite meteorites. The dynamical properties of 2015 JD1 suggest that it came from the ν6 resonance with Jupiter, and spectral comparison with major E-type bodies suggests that it may have been derived from a parental body similar to the progenitor of the E-type (64) Angelina. Significantly, we find rotational spectral variation across the surface of 2015 JD1 from the red to blue spectral slope. Our compositional analysis suggests that the spectral slope variation could be due to the lack of iron and sulfides in one area of the surface of 2015 JD1 and/or differences in grain sizes.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Onboard space systems
- Rymdtekniska system
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- ref (ämneskategori)
- art (ämneskategori)
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