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The Orientation of the Dynamical Frames Relative ICRF by Use of Optical and Radar Observations Near-Earh Asteroids (NEAs)

Yagudina, E. I.

ICRF (practical realization of ICRS) is now adopted as the fundamental celestial frame in astronomy. It is based on the positions of the extragalactic radio sources obtained by VLBI observations. Zero-point of right acsentions of ICRF was chosen in a such way that the right ascention of 3C273B quasar was taken from FK5 at the same epoch. The Hippa…