Time and phase resolved optical spectra of potentially hazardous asteroid 2014 JO25

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dc.contributor.author Venkataramani, Kumar
dc.contributor.author Ganesh, Shashikiran
dc.contributor.author Rai, Archita
dc.contributor.author Husárik, Marek
dc.contributor.author Baliyan, Kiran S.
dc.contributor.author Joshi, U. C.
dc.date.accessioned 2019-03-27T06:42:11Z
dc.date.available 2019-03-27T06:42:11Z
dc.date.issued 2019-03
dc.identifier.citation Venkataramani, Kumar; Ganesh, Shashikiran; Rai, Archita; Husárik, Marek; Baliyan, K. S. and Joshi, U.C., "Time and phase resolved optical spectra of potentially hazardous asteroid 2014 JO25", arXiv, Cornell University Library, DOI: arXiv:1903.04764, Mar. 2019. en_US
dc.identifier.uri http://arxiv.org/abs/1903.04764
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/4339
dc.description.abstract The asteroid 2014 JO25, considered to be "potentially hazardous" by the Minor Planet Center, was spectroscopically followed during its close-Earth encounter on 19th and 20th of April 2017. The spectra of the asteroid were taken with the low resolution spectrograph (LISA), mounted on the 1.2-m telescope at the Mount Abu Infrared Observatory, India. Coming from a region close to the Hungaria population of asteroids, this asteroid follows a comet-like orbit with a relatively high inclination and large eccentricity. Hence, we carried out optical spectroscopic observations of the asteroid to look for comet-like molecular emissions or outbursts. However, the asteroid showed a featureless spectrum, devoid of any comet-like features. The asteroid's light curve was analyzed using V band magnitudes derived from the spectra and the most likely solution for the rotation of the asteroid was obtained. The absolute magnitude H and the slope parameter G were determined for the asteroid in V filter band using the IAU accepted standard two parameter H-G model. A peculiar, rarely found result from these observations is its phase bluing trend. The relative B-V color index seems to decrease with increasing phase angle, which indicates a phase bluing trend. Such trends have seldom been reported in literature. However, phase reddening in asteroids is very common. The asymmetry parameter g and the single scattering albedo w were estimated for the asteroid by fitting the Hapke phase function to the observed data. The asteroid shows relatively large value for the single scattering albedo and a highly back scattering surface.
dc.description.statementofresponsibility by Venkataramani Kumar, Ganesh Shashikiran , Archita Rai, Marek Husárik, K. S.Baliyan and U.C. Joshi
dc.language.iso en en_US
dc.publisher Cornell University Library en_US
dc.subject Earth and Planetary Astrophysics (astro-ph.EP) en_US
dc.title Time and phase resolved optical spectra of potentially hazardous asteroid 2014 JO25 en_US
dc.type Preprint en_US


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