Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 56, p. 22-25 (2017)
Results from optical CCD observations of asteroid 2014 JO25 during its close approach to the Earth on April 19, 2017
Maigurova, Ph. D.,
A. Pomazan, Junior Researcher,
Research Institute “Mykolaiv Astronomical Observatory”
Kozhuhov, Ph. D.
Center of Special Information Receiving and Processing and Navigating Field Control, National Center Of Space Facilities Control And Test, State Space Agency of Ukraine
Abstract
Astrometric observations play a key role in ensuring that moving objects first detected remain recoverable after their discovery. The asteroid 2014 JO25 qualified as Potentially Hazardous Asteroid was discovered in May 2014 by astronomers at the Catalina Sky Survey, Arizona. We present the results of the optical CCD-observations of the asteroid 2014 JO25 obtained during its close approach to the Earth April 19, 2017. The observations of the asteroid were carried out at telescope KT-50 (Mobitel complex) of Nikolaev Astronomical Observatory and short-focus 0.30-m Zonnefeld telescope equipped CMOS camera of Center of Special Information Receiving and Processing and Navigating Field Control. The observations series during three nights were obtained (April 19, 24, 25). The observations were reduced with the Astrometrica software, using the USNO CCD Astrograph Catalogue 4 (UCAC-4) as a reference. We have made the comparison of observed topocentric positions (O) with the calculated ephemeris (C) provided by online service HORIZONS and have calculated the residuals (O−C) in both coordinates. The RMS errors of the differences (O-C) were within (0.1-0.2) ² and (03 – 0.4) ². for Nikolaev and Zalistsy observations respectively. To estimate external accuracy of our observations and to compare our results with other observatories from open data-base NEODyS-2 was used.
Key words
optical CCD observations, asteroid 2014 JO25
References
Minor Planet Electronic Circ., No.2014-J74 (2014)
NASA Jet Propulsion Laboratory https://echo.jpl.nasa.gov/asteroids/2014JO25/2014JO25_planning.html
The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4).2013, AJ, №145, 44
MinorPlanet&CometEphemerisServicehttp://www.minorplanetcenter.net/iau/MPEph/MPEph.html
NASAJetPropulsionLaboratoryhttps://ssd.jpl.nasa.gov/horizons.cgi#top
NEODys-2 NearEarthObjectsDynamicSitehttp://newton.dm.unipi.it/neodys/index.php?pc=0