Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition

Myung Jin Kim, Young Jun Choi, Hong Kyu Moon, Masateru Ishiguro, Stefano Mottola, Murat Kaplan, Daisuke Kuroda, Dhanraj S. Warjurkar, Jun Takahashi, Yong-Ik Byun

Research output: Contribution to journalArticle

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Abstract

Context. Near-Earth asteroid 162173 (1999 JU3) is a potential target of two asteroid sample return missions, not only because of its accessibility but also because of the first C-type asteroid for exploration missions. The lightcurve-related physical properties of this object were investigated during the 2011 - 2012 apparition. Aims. We aim to confirm the physical parameters useful for JAXA's Hayabusa 2 mission, such as rotational period, absolute magnitude, and phase function. Our data complement previous studies that did not cover low phase angles. Methods. With optical imagers and 1-2 m class telescopes, we acquired the photometric data at different phase angles. We independently derived the rotational lightcurve and the phase curve of the asteroid. Results. We have analyzed the lightcurve of 162173 (1999 JU3), and derived a synodic rotational period of 7.625 ± 0.003 h, the axis ratio a/b = 1.12. The absolute magnitude HR = 18.69 ± 0.07 mag and the phase slope of G = -0.09 ± 0.03 were also obtained based on the observations made during the 2011-2012 apparition. These physical properties are in good agreement with the previous results obtained during the 2007-2008 apparition.

Original languageEnglish
Article numberL11
JournalAstronomy and Astrophysics
Volume550
DOIs
Publication statusPublished - 2013 Jan 1

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asteroids
asteroid
phase shift
physical property
physical properties
sample return missions
complement
accessibility
telescopes
slopes
curves

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Kim, Myung Jin ; Choi, Young Jun ; Moon, Hong Kyu ; Ishiguro, Masateru ; Mottola, Stefano ; Kaplan, Murat ; Kuroda, Daisuke ; Warjurkar, Dhanraj S. ; Takahashi, Jun ; Byun, Yong-Ik. / Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition. In: Astronomy and Astrophysics. 2013 ; Vol. 550.
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abstract = "Context. Near-Earth asteroid 162173 (1999 JU3) is a potential target of two asteroid sample return missions, not only because of its accessibility but also because of the first C-type asteroid for exploration missions. The lightcurve-related physical properties of this object were investigated during the 2011 - 2012 apparition. Aims. We aim to confirm the physical parameters useful for JAXA's Hayabusa 2 mission, such as rotational period, absolute magnitude, and phase function. Our data complement previous studies that did not cover low phase angles. Methods. With optical imagers and 1-2 m class telescopes, we acquired the photometric data at different phase angles. We independently derived the rotational lightcurve and the phase curve of the asteroid. Results. We have analyzed the lightcurve of 162173 (1999 JU3), and derived a synodic rotational period of 7.625 ± 0.003 h, the axis ratio a/b = 1.12. The absolute magnitude HR = 18.69 ± 0.07 mag and the phase slope of G = -0.09 ± 0.03 were also obtained based on the observations made during the 2011-2012 apparition. These physical properties are in good agreement with the previous results obtained during the 2007-2008 apparition.",
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Kim, MJ, Choi, YJ, Moon, HK, Ishiguro, M, Mottola, S, Kaplan, M, Kuroda, D, Warjurkar, DS, Takahashi, J & Byun, Y-I 2013, 'Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition', Astronomy and Astrophysics, vol. 550, L11. https://doi.org/10.1051/0004-6361/201220673

Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition. / Kim, Myung Jin; Choi, Young Jun; Moon, Hong Kyu; Ishiguro, Masateru; Mottola, Stefano; Kaplan, Murat; Kuroda, Daisuke; Warjurkar, Dhanraj S.; Takahashi, Jun; Byun, Yong-Ik.

In: Astronomy and Astrophysics, Vol. 550, L11, 01.01.2013.

Research output: Contribution to journalArticle

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AU - Kim, Myung Jin

AU - Choi, Young Jun

AU - Moon, Hong Kyu

AU - Ishiguro, Masateru

AU - Mottola, Stefano

AU - Kaplan, Murat

AU - Kuroda, Daisuke

AU - Warjurkar, Dhanraj S.

AU - Takahashi, Jun

AU - Byun, Yong-Ik

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N2 - Context. Near-Earth asteroid 162173 (1999 JU3) is a potential target of two asteroid sample return missions, not only because of its accessibility but also because of the first C-type asteroid for exploration missions. The lightcurve-related physical properties of this object were investigated during the 2011 - 2012 apparition. Aims. We aim to confirm the physical parameters useful for JAXA's Hayabusa 2 mission, such as rotational period, absolute magnitude, and phase function. Our data complement previous studies that did not cover low phase angles. Methods. With optical imagers and 1-2 m class telescopes, we acquired the photometric data at different phase angles. We independently derived the rotational lightcurve and the phase curve of the asteroid. Results. We have analyzed the lightcurve of 162173 (1999 JU3), and derived a synodic rotational period of 7.625 ± 0.003 h, the axis ratio a/b = 1.12. The absolute magnitude HR = 18.69 ± 0.07 mag and the phase slope of G = -0.09 ± 0.03 were also obtained based on the observations made during the 2011-2012 apparition. These physical properties are in good agreement with the previous results obtained during the 2007-2008 apparition.

AB - Context. Near-Earth asteroid 162173 (1999 JU3) is a potential target of two asteroid sample return missions, not only because of its accessibility but also because of the first C-type asteroid for exploration missions. The lightcurve-related physical properties of this object were investigated during the 2011 - 2012 apparition. Aims. We aim to confirm the physical parameters useful for JAXA's Hayabusa 2 mission, such as rotational period, absolute magnitude, and phase function. Our data complement previous studies that did not cover low phase angles. Methods. With optical imagers and 1-2 m class telescopes, we acquired the photometric data at different phase angles. We independently derived the rotational lightcurve and the phase curve of the asteroid. Results. We have analyzed the lightcurve of 162173 (1999 JU3), and derived a synodic rotational period of 7.625 ± 0.003 h, the axis ratio a/b = 1.12. The absolute magnitude HR = 18.69 ± 0.07 mag and the phase slope of G = -0.09 ± 0.03 were also obtained based on the observations made during the 2011-2012 apparition. These physical properties are in good agreement with the previous results obtained during the 2007-2008 apparition.

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