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Information × Registration Number 0204U000514, 0101U000218 , R & D reports Title Extension of the optical reference coordinate frame HCRF to the faint stars in the selected fields and determination of its link with radio coordinate frame ICRF popup.stage_title Head Pinigin Gennady Ivanovich, Registration Date 10-02-2004 Organization Research Institute "Nikolaev Astronomical Observatory" popup.description2 The most important task of modern positional astronomy is the linking of the optical (HCRF) to the most stable (inertial) radio (ICRF) reference frame based on the precise positions of 610 extragalactic radio sources (ERS). Unreliable rotation should be refined. The main concept of this problem is calculation of rotation parameters between HCRF and ICRF using the optical and radio position differences of ERS. Good quality CCD observations of 269 areas around the ERS were obtained. Data processing of observations of 200 ERS in declination zone from -40° to +80° was carried out. Obtained accuracy of ERS differences O-R (optical - radio position) is not worse than 30 mas. The catalog of 200 ERS with accuracy 25-30 mas was compiled. The following values of angles of connection between optical and radio reference frames in zone of declinations from -40° to +80° were calculated:wx= -1.3±7.2, wy=9.3±6.7, wz = 6.1±5.7mas. Product Description popup.authors popup.nrat_date 2020-04-02 Close