1149A I/149A Fifth Fundamental Catalogue W Fricke H Schwan T Lederle U Bastian R Bien G Burkhardt B du Mont R Hering R Jaehrling H Jahreiss S Roeser H M Schwerdtfeger H G Walter Veroeff. Astron. Rechen-Institut Heidelb. No. 32 ??? ??? 1988 1988VeARI..32....1F I/175 : FK5, Part II (Extension). Argelander, F. W. A. 1859-62, Bonner Sternverzeichniss, erste bis dritte Sektion, Astronomischen Beobachtungen auf der Sternwarte der Koeniglichen Rhein., Friedrich-Wilhelms-Universitaet zu Bonn, Baende 3-5 (Catalog <I/122>) Boss, B. 1937, General Catalogue of 33342 Stars for the Epoch 1950, Carnegie Institution of Washington Pub. 468 (Washington, Carnegie Institution of Washington) (Catalog <I/113>) Cannon, A. J., & Pickering, E. C. 1918-24, The Henry Draper Catalogue, Ann. Astron. Obs. Harvard College, 91-99 (Catalog <III/135>) Corbin, T. E. 1978, in IAU Colloquium 48, Modern Astrometry, ed. F. V. Prochazka & R. H. Tucker (Vienna, University Obs.), p. 505 (Catalog <I/72>) Fricke, W., & Kopff, A. 1963, Fourth Fundamental Katalog (FK4), Veroeff. Astron. Rechen-Inst. Heidelb. No. 10. (Catalog <I/15>) Fricke, W., Schwan, H., & Lederle, T. (in collaboration with Bastian, U., Bien, R., Burkhardt, G., du Mont, B., Hering, R., Jaehrling, R., Jahreiss, H., Roeser, S., Schwerdtfeger, H. M., & Walter, H. G.) 1988, Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars, Veroeff. Astron. Rechen-Institut Heidelb. No. 32 (Catalog <I/149>) Gill, D., & Kapteyn, J. C. 1895-1900, Cape Photographic Durchmusterung, Ann. Cape Obs., 3 (1895, Part I: zones -18 deg. to -37 deg.); 4 (1897, Part II: zones -38 deg. to -52 deg.); 5 (1900, Part III: zones -53 deg. to -89 deg.) (Catalog <I/108>) Kuestner, F. 1903, Bonner Durchmusterung des Noerdlichen Himmels, zweite berichtigte Auflage, Bonn Universitaets Sternwarte (Bonn, A. Marcus und E. Weber's Verlag) (Catalog <I/122>) Lieske, J. H. 1979, Astron. & Astroph., 73, 282 (=1979A&A....73..282L) Nicolet, B. 1975, Catalogue of Measurements in the Cape UBV Photometry on Magnetic Tape, Astron. & Astroph. Supp., 22, 239 (Catalog <II/27>) Nicolet, B. 1978, Catalogue of Homogeneous Data in the UBV Photoelectric Photometric System, Astron. & Astroph. Supp., 34, 1 (=1978A&AS...34....1N) Schoenfeld, E. 1886, Bonner Sternverzeichniss, vierte Sektion, Astronomische Beobachtungen auf der Sternwarte der Koeniglichen Rheinischen Friedrich-Wilhelms-Universitaet zu Bonn, 8, Part IV (Bonn, Adolph Marcus Verlag) (Catalog <I/119>) Scott, F. P., & Smith, C. A., Jr. 1971, Comparison of the SAO and AGK3R Star Catalogues, in Conference on Photographic Astrometric Techniques, ed. H. K. Eichhorn, NASA CR-1825 Smith, C. A., Corbin, T. E., Hughes, J. A., Jackson, E. S., Krutskaya, E. V., Polozhentsev, A. D., Polozhentsev, D. D., Yagudin, L. I., & Zverev, M. S. 1990, in IAU Symposium No. 141, Inertial Coordinate System on the Sky, ed. J. H. Lieske & V. K. Abalakin (Dordrecht, Reidel), p. 457 (Catalog <I/138>) Thome, J. M. 1892-1932, Cordoba Durchmusterung, Resultados del Observatorio Nacional Argentino, 16 (1892, Part I: -22 deg. to -32 deg.); 17 (1894, Part II: -32 deg. to -42 deg.); 18 (1900, Part III: -42 deg. to -52 deg.); 21 (Part I) (1914, Part IV, -52 deg. to -62 deg.); 21 (Part II) (1932, Part V: -62 deg. to -90 deg.) (Catalog <I/114>) Proper motions Positional data The Basic Fifth Fundamental Catalogue (FK5) Part I provides improved mean positions and proper motions for the 1535 classical fundamental stars that had been included in the FK3 and FK4 catalogs. The machine version of the catalog contains the positions and proper motions of the Basic FK5 stars for the epochs and equinoxes J2000.0 and B1950.0, the mean epochs of individual observed right ascensions and declinations used to determine the final positions, the mean errors of the final positions and proper motions for the reported epochs, and ancillary data such as magnitudes, spectral types, parallaxes, radial velocities, and cross identifications to other catalog designations.

The Basic FK5 is the successor to the FK4 (Fricke & Kopff 1963) and contains the 1535 classical fundamental stars used to define the latter system. It represents a revision of the FK4 and results from the determination of systematic and individual corrections to the mean positions and proper motions of the FK4, the elimination of the error in the FK4 equinox, and the introduction of the IAU (1976) system of astronomical constants. About 300 catalogs providing star positions obtained from throughout the world are included in the FK5. This document should be used only to supplement the information contained in the source reference. The latter should be consulted for more detailed information regarding the motivation for construction of the FK5, the determination of its equator and equinox, the expressions for general precession, a discussion of the FK5 system, systematic differences between the FK4 and FK5, the transformation of observational catalogs to the FK5 system and to the reference system J2000.0, and more thorough descriptions of the data contained in the FK5 catalog.

FK5 FK5 number These numbers have remained the same from the FK3 and FK4 (Catalog <I/15>). The user should note that the file is ordered by FK5 number, which means that the stars are arranged neither by right ascension nor by declination. --- RAh Right ascension, hours, Equinox=J2000, Epoch=J2000 h RAm Right ascension minutes (J2000.0) min RAs Right ascension seconds (J2000.0) The terms of elliptic aberration have been eliminated from the mean positions. The B1950.0 data have been computed from the J2000.0 data using a procedure described in the source reference (Fricke et al. 1988) based on the IAU (1976) system of astronomical constants (see also Lieske 1979). s pmRA Proper motion in RA (J2000.0) s/ha DE- Sign of declination (Dec) (J2000.0) --- DEd Declination degrees (J2000.0) deg DEm Declination arcminutes (J2000.0) arcmin DEs Declination arcseconds (J2000.0) arcsec pmDE Proper motion in DE (J2000.0) arcsec/ha RAh1950 Right ascension, hours Equinox=B1950, Epoch=B1950 h RAm1950 Right ascension minutes (B1950.0) min RAs1950 Right ascension seconds (B1950.0) s pmRA1950 Proper motion in RA (B1950.0) s/ha DE-1950 Sign of declination (B1950.0) --- DEd1950 Declination degrees (B1950.0) deg DEm1950 Declination arcminutes (B1950.0) arcmin DEs1950 Declination arcseconds (B1950.0) arcsec pmDE1950 Proper motion in DE (B1950.0) arcsec/ha EpRA-1900 Mean Epoch of observed RA Mean epoch (-1900.0) of the individual observed right ascensions and declinations. a e_RAs Mean error in RA The mean errors of the positions at the mean epoch and of the corresponding proper-motion components, as obtained from the solution of the normal equations within the derivations of individual positions and proper motions. (These mean errors do not include those of the FK5 system and of the equinox and equator.) ms e_pmRA Mean error in pmRA ms/ha EpDE-1900 Mean Epoch of observed DE a e_DEs Mean error in Declination carcsec e_pmDE Mean error in pmDE carcsec/ha Vmag V magnitude Photoelectric magnitudes on the UBV system, as taken from the catalogs of Nicolet (1975, 1978). Variability is indicated by a flag in byte 129. For physical double stars, the magnitudes of the brighter components are given (both are given in the published catalog). mag n_Vmag Magnitude flag Where magnitude ranges are given in the published catalog, the brighter magnitude is given and byte 129 contains an upper case "V". A lower case "v" is present if there is variability and that letter is present in the published catalog (amplitude exceeds 0.3mag). A "D" code indicates that the magnitudes of two close components are given as a footnote in the published catalog. Only the first of the two is contained in the magnitude field of the machine-readable catalog. --- SpType Spectral type(s) A one-dimensional spectral type taken from the FK4 catalog. These types are from the Henry Draper Catalogue (Cannon & Pickering 1918-24). For binary and multiple systems where spectral types are known for more than one component, a second spectral type may be given following a plus sign. --- plx Parallax Trigonometric parallax if known (blank otherwise). These data are taken from a preliminary version of the new Yale parallax catalog (van Altena, Lee, & Hoffleit, in preparation). Negative parallaxes present in the Yale catalog have been omitted here because they are of no use in computing apparent places from the mean positions. arcsec RV Radial velocity Radial Velocity if known (blank otherwise) km/s AGK3R AGK3R number (Catalog <I/72>) --- SRS SRS number (Catalog <I/138>) --- HD HD number (Catalog <III/135>) --- DM DM identifier the prefixes are BD: Bonner Durchmusterung (Argelander 1859-62, Kuestner 1903) SD: Southern Durchmusterung (Schoenfeld 1886) CD: Cordoba Durchmusterung (Thome 1892-1932) CP: Cape Photographic Durchmusterung (Gill & Kapteyn 1895-1900) --- GC GC number (Catalog <I/113>) --- Nancy G. Roman ADC/SSDOO rev. Francois Ochsenbein CDS 1995Jun13Dr. H. Schwan kindly supplied the original and revised versions of the on magnetic tape and colleagues at the Astronomisches Rechen-Institut generously reviewed a draft copy of the original documentation prior to its final release for distribution with machine-readable copies of the catalog, and Dr. Schwan returned comments and corrections. Appreciation is expressed to Dr. William M. Owen Jr. of JPL for supplying the machine-readable FK4, DM cross index that was used to insert DM numbers into the original version of the FK5 catalog. UNKNOWN UNKNOWN The following format changes were made by W. H. Warren Jr. (with Dr. Schwan's concurrence): The DM identifiers, which were single-digit numerical codes, were changed to the literal codes. Plus signs were added to the trigonometric-parallax data, even though no negative parallaxes are included in the catalog, to indicate that negative parallaxes are possible. Multiple blanks between data fields were removed, as were blanks beyond the end of each record, to decrease the logical record length from 220 bytes to 190 bytes. I_149A.xml