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I/202               The FK5 Extension of the FK4 System (Lattanzi+ 1993)

The FK5 Extension on the FK4 System Lattanzi M.G., Taff L.G. <Astron. J., 105, 2353, (1993)> =1993AJ....105.2353L
ADC_Keywords: Positional data ; Proper motions ; Fundamental catalog Description: The FK5 catalog was expanded from 1535 stars to include an additional 3117 stars which comprise the 'extension' to the new 'Basic' FK5, the revision of the FK4. For the basic FK5 a method of converting from the FK5 system to the FK4 system is provided in the catalog while for the Extension no algorithm was supplied. This catalog consists of two files. One file is the FK5 Extension placed at B1950.0 on the FK4 system. The second file is the FK5 Extension placed at the mean Epoch of place on the FK4 system. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file fk5e1950.dat 87 3117 FK5 Extension at B1950.0 on FK4 system fk5emean.dat 87 3117 FK5 Extension on the FK4 B1950.0 (Mean epoch of place) catalog.doc 80 207 Description of the catalog
See also: I/143 : FK4 and FK4 Supplement (Fricke+ 1963) I/149 : FK5 Catalogue (Fricke+ 1988) I/175 : FK5 Extension (Fricke+ 1991) Byte-by-byte Description of file: fk5e1950.dat, fk5emean.dat
Bytes Format Units Label Explanations
2- 5 I4 --- FK5 FK5 Extension ID number 6- 11 F6.2 mag Vmag V magnitude 12- 26 F15.10 h RAh Right Ascension (B1950.0) in decimal hrs 27- 41 F15.10 deg DEdeg Declination (B1950.0) in decimal degrees 42- 49 F8.2 yr Epoch_RA Mean Epoch of RA in decimal years 50- 57 F8.2 yr Epoch_DEC Mean Epoch of DEC in decimal years 70- 78 F9.3 cs/yr pmRA Proper Motion in RA (B1950.0) sec/cy 79- 87 F9.3 carcsec/yr pmDE Proper Motion in DEC (B1950.0) arcsec/cy
References: Taff, L.G., Computational Spherical Astronomy, Wiley and Sons, Inc. NY, p.49 (1981) Taff, L.G., Bucciarelli, B., And Lattanzi, M.G., Ap.J., 361, 367 (1990) (1990ApJ...361..667T) Acknowledgements: Dr. Taff supplied the catalog documentation in printed form. This documentation was then keyed in at the ADC.
(End) N. Paul M. Kuin [NASA/NSSDC/ADC] 1996-Apr-18
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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