Baseline observations of potentially hazardous asteroids in 2017
UDC
523.44; 520.8Abstract
In 2017, Pulkovo observatory organized two campaigns of baseline observations of two asteroids during their approaches to the Earth: 2014 JO25 (on April) and (418094) 2007 WV4 (on June). The goal of the campaigns was development of method of construction of precise asteroid orbits using short-time (1-2 hours) simultaneous observations from two observatories (triangulation method). Six observatories participated in the 2017 campaigns: Ussuriisk Astrophysics Observatory of RAS, Gissar and Sanglokh observatories of Institute of Astrophysics of Tajikistan, Zvenigorod Observatory of Institute of Astronomy of RAS, Pulkovo Observatory of RAS, Mountain Astronomical Station of Pulkovo Observatory. The orbit constructed with this method for 2014 JO25 asteroid is close to the orbit published on the MPC web-site that was constructed with more than 1.5 thousand observations of many observatories from 2011 to 2017. The results of the campaigns show that given existing accuracy of astrometric measurements, simultaneous observations of two observatories during more than 1 hour and the parallax angle of more than 10 arcmin are needed to construct sufficiently precise orbit. Also, the estimation of BVRI color indices of 2014 JO25 asteroid was made.
Keywords:
asteroid-comet hazard, potentially hazardous asteroids, astrometry, photometry, base-line observations, celestial mechanics, orbit determinationReferences
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Copyright (c) 2017 Devyatkin A.V., Gorshanov D.L., Petrova S.N., Bashakova E.A., L'vov V.N., Tsekmeister S.D., Rusov S.A., Ivanov A.V., Vershkov A.N., Martyusheva A.A., Barabanov S.I., Erofeev D.V., Kokhirova G.I., Khamroev U.Kh., Buriev A.M.
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