Astrometria - Astrometry

 

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SMITHSONIAN ASTROPHYSICAL OBSERVATORY STAR CATALOG, Version J2000

Smithsonian Astrophysical Observatory Staff, 1966, Reprinted 1971, Positions and Proper Motions of 258997 Stars for the Epoch and Equinox 1950, Publ. Smithsonian Inst., 4652, Washington DC

Roman N.G., Warren W.H. Jr, 1989-90, Smithsonian Astrophysical Observatory Catalog (SAO).  Documentation for the Machine-readable Version (Version 1990), NSSDC/WDC-A-R&S 89-08

Name Equinox d zone N_rec N_var RecL Objects

Type

CDS id. Band
SAOJ2000 2000 all sky 258,997 45 272 Stars Astrometric 1131A Optical

The SAO Star Catalog results from the combination of several earlier catalogs as far as the FK3 (Kopff 1937-38), FK4 (Fricke et al. 1963), GC (Boss et al. 1937), AGK1 (different authors 1898-1910), AGK2 (Schorr & Kohlschütter 1951-58), Greenwich AC (Dyson 1914), Yale Zone (YZ, Barney et al. 1959a,b), CPC (Jackson & Stoy 1954-58, Stoy 1966-68), Cape Zone (Gill & Hough 1923), Me3 (Ellery & Baracchi 1917) and Me4. The compilation gives positions and proper motions for 258,997 stars, of which 8,712 are double and 499 variable, with an average distribution of 6 stars per square degree. The star positions have an average standard deviation of 0.2" at their original epochs (0.5" at epoch 1963.5). The equinox is 1950.0 and the system that of the FK4. Corrections were applied to the positions and proper motions given in all catalogs not already in the FK4 system. Stars from catalogs that were referred to an equinox other than that of 1950.0 were precessed to 1950.0 by use of Newcomb's constant and the rigorous formulae. This is an updated, corrected and extended machine-readable version of the SAO catalog from National Space Science Data Center. A character-coded machine-readable version of the catalog was prepared by Nagy in 1979 (appendix 1 ref. 6). In addition to certain format modifications, equatorial coordinates in radians and cross-identifications from theTable of Correspondences SAO/HD/DM/GC (Morin 1973) were added to the converted version; however, the known errata lists were not incorporated at that time. This version of the catalog served as a starting point for the present version.

As a prelude to creation of the 1984 version of the catalog, a new version of the SAO-HD-GC-DM Cross Index was prepared (Roman et al. 1983), since most of the changes and extensions involve data presently in the Cross Index. The 1984 version contains the corrected and extended cross-identifications, all errata published up to January 1984, numerous errors forwarded by colleagues, and errors discovered at the Astronomical Data Center (ADC) during the course of this work. Following completion of the Cross Index, all appropriate cross-identification data were replaced in the 1984 SAO. Additional corrections involving the SAO only were then made. In certain cases, SAO positions had been found in error, but correct positions in the SAO system could not have been derived without a re-reduction of all the original data. Since this would clearly have been impracticable, positions were taken from the CPC for 1950.0. Errata for the CPCs have been published in the zone catalog for -80° to -90° (Stoy 1968, appendix 1 ref. 8). The CPC proper motions were applied to the positions at epoch to bring them to epoch 1950.0.

In the 1984 version, a total of 12,373 SAO records (4.8%) was corrected or supplemented with 17,915 individual data changes (see appendices 1 and 2). Recently, Smith of the U.S. Naval Observatory, volunteered to provide J2000.0 positions and proper motions in the FK5 system for the SAO stars. These data have been added to the end of each record, the positions in both sexagesimal and radians form. Additional errors of which the authors are aware (as of May 1991) have been corrected.

DIRA2 catalogue format

Code

Column

Format

Description

 

 

APPENDICES

Since many of the changes involve corrections to data given in previously published catalogs, it is important for a user to have access to the individual changes if a discrepancy is found between this catalog and a previously published one. For this reason, it has been prepared a complete table of all changes made to the previous version to produce the 1984 version as well as tables of additional changes in the 1989 and 1990 versions.

The first corrections and changes table was prepared by comparing the uncorrected file against the new version with a computer program which compared the data fields one by one and produced a formatted changes table.

1.

References for changes to the SAO Catalog, version 1984.

Source code

Reference(s)

 1

Haramundanis K., undated, Errata Sheet for the SAO Star Catalog, and same author, 1971, Note on SAO Catalog Errata

2

  1. Stein W.L., Rudisill J.C., 1977, Introduction to the Dahlgren General Catalog, Naval Surface Weapons Center NSWC/DL TR-3607;

  2. Stein W.L., 1978, in Bischoff M., CDS Inf. Bull., 14, 2 and 15, 103

  3. Stein W.L., private communication

3

Bischoff M., 1978, CDS Inf. Bull., 14, 2; 15, 103

4

Hoffleit D., private communication

5

Parsons S.B., 1977, CDS Inf. Bull., 12, 41

6

Nagy T.A., 1979, Documentation for the Machine-Readable Version of the SAO Catalogue, (EBCDIC Version), Systems & Applied Sci. Co. R-SAW-7/79-34

7

Houziaux L., Blondelot-Lickes J., 1970, Centre Univ. Mons, Fac. Sci., Dept. Astrophys., Comm. n. 13

8

Stoy R.H., 1968, Cape Photographic Catalogue for 1950.0, Ann. Cape Obs., XXII (-80° to -90°)

9

McLaughlin S.F., private communication

10

Bonnet R., 1978, Cross Identifications of HDE Stars, CDS Inf. Bull., 15, 155, magnetic tape version, CDS catalog n. 4008

11

Warren W.H. Jr, Kress K., 1980, Catalog of Supplemental Stars to the Bonner Durchmusterung (BDSUP), ADC Bull., 1, 19

12

Errors and additions from the ADC work

13

Schmidtke P.C., private communication

14

Herald D., 1979, Occultation Newslett., 2, 49

 

2.

 

Explanatory Notes to Individual Changes.
It includes further notes on entries in the microfiche table for which additional explanations  are considered useful to clarify the reasons for certain changes.

SAO

Note(s)

6404

The GC incorrectly identifies this star as BD +76 309; GC 11190 is BD +76 309, while this star is +77 309.

9947

This star is misidentified as BD +70 1162 in the GC, as it is in the IDS and ADS catalogs. Source 3 corrects the DM number to +70 1161, assuming that the double entry for +70 1161 represents the two components of the double star. This is not the case. SAO 9949 is a duplicate entry and should be deleted.

15097

The GC incorrectly lists this star as BD +65 761. It is actually +65 751, while +65 761 is SAO 15120, which does not appear in the GC.

17589

The GC incorrectly identifies this star as BD +68x 936, whereas it is actually +69 936.

23221

Source 1 incorrectly gives this star as BD +53 568a. It is actually +52 568a.

24753

This star is listed as BD +57 825 in several catalogs. It is not in the proper position for the BD star, however. There is a star at the SAO position on photographs, but it is not in the BD.

29370
29372

These corrections are probably in error. The BD gives +54 1724 as being SW of +54 1725 and lists both star as magnitude 7.5. The SAO, AGK3 and IDS list the brighter star (DMAG = 0.6 mag) as SE. The HD also lists the brighter star as south, but gives the same right ascension for both stars. The IDS identifies the brighter star as BD +54 1724, as do the HD and SAO, but the AGK3 reverses the DM numbers, listing the brighter star as +54 1725.

101858

Sources 2 and 3 suggested changing this stars to BD +17 2945. It is part of a triple system of which C, the fainter, more distant component, is +17 2945. SAO 101858 and 101859 appear to be the A and B components, respectively, of +17 2946.

238176

The GC is in error. GC 14513 is CP -54 3795 and is not in the HD. GC 14517 is CP -54 3797, which is HD 91593.

REFERENCES

Aitken R.G., 1932, New General Catalogue of Double Stars within 120° of the North Pole, Publ. Carnegie Inst. Washington, 417(I-II)

Argelander F.W.A., 1859-62, Bonner Sternverzeichniss, Sec. 1-3, Astron. Beobach. Sternw. König. Rhein., vols. 3 to 5

Barney I., Hoffleit D., Jones R.B., 1959a, Catalogue of the Positions and Proper Motions of 8380 Stars Between Declinations +50° and +55°, reduced without applying Proper Motions to the Equinox 1950.0, Trans. Astron. Obs., Yale Univ., 26(II)

Barney I., Hoffleit D., Jones R.B., 1959b, Catalogue of the Positions and Proper Motions of 8164 Stars Between Declinations +55° and +60°, reduced without applying Proper Motions to the Equinox 1950.0, Trans. Astron. Obs., Yale Univ., 27

Boss B. et al., 1936-37, rev. ADC version 1985, General Catalogue of 33342 Stars for the Epoch 1950, Publ. Carnegie Inst. Washington, 468, 5 vols. (1113A)  

Burnham S.W., Hussey W.J., 1907, A General Catalogue of Double Stars within 121° of the North Pole, Astrophys. J., 26, 195

Cannon A.J., Pickering E.C., 1918-24, The Henry Draper Catalogue, Ann. Astron. Obs. Harvard Coll., 91 to 99 (3135A)

Cannon A.J., 1925-36, The Henry Draper Extension (HD 225301-272150), Ann. Astron. Obs. Harvard Coll., 100, 17

Cannon A.J., Walton Mayall M., 1949, The Henry Draper Extension. II. Charts (HD 272151-359082), The Annie J. Cannon Memorial Volume, Ann. Astron. Obs. Harvard Coll., 112, 1-295 (3138)  

Different authors, 1898-1910, Katalog der Astronomischen Gesellschaft, Zweite Abtheilung, 7 vols.

Dyson F.W., 1914, Astrographic Catalogue 1900.0, Greenwich Section, London, H.M.S. Off., 3  

Melbourne Obs., 1917, Third Melbourne General Catalogue of 3,068 Stars for the Equinox 1890, from observations made at Melbourne Observatory during the period 1884.7 to 1894.0, under the direction of R.L.J. Ellery ... Rev. and prepared for press under the direction of Pietro Baracchi ..., Melbourne

Melbourne Obs., ?, Fourth Melbourne General Catalogue, of 5,157 Stars from Observations 1894.0 to 1910.0, reduced without Proper Motion to the Equinox 1900.0, (microfilm), Unpublished  (Me4 - 1148)  

Fricke W. et al., 1963, Fourth Fundamental Catalogue (FK4), Veröff. Astron. Rechen-Inst. Heidelberg, 10, 144 pgs (1143)

Gill D., Kapteyn J.C., 1896-1900, The Cape Photographic Durchmusterung for the Equinox 1875, Ann. Cape Obs., 3 to 5 (1108)

Gill D., Hough S.S., 1923, Zone Catalogue of 20,843 Stars, Equinox 1900, R. Obs., Cape of Good Hope  

Innes R.T.A., Dawson B.H., van den Bos W.H., 1927, Southern Double Star Catalogue, -19° to -90°, Union Obs.

Jackson J., Stoy R.H., 1954-58, The Cape Photographic Catalogue for 1950.0, Ann. Cape Obs., XVII-XX

Jeffers H.M., van den Bos W.H., Greeby F.M., 1963, Index Catalogue of Visual Double Stars, 1961.0,Publ. Lick Obs., XXI(I-II)

Jenkins H., 1943, Corrections to the General Catalogue, Astron. J., 50, 142-144

Jenkins H., 1945, Corrections to the General Catalogue, Second List, Astron. J., 51, 152  

Kopff A., 1937, Dritter Fundamentalkatalog des Berliner Astronomischen Jahrbuchs. I. Die Auwers-Sterne für die Epochen 1925 und 1950, Veröff. Astron. Rechen-Institut Berlin-Dahlem, 54, 1-117

Kopff A., 1938, Dritter Fundamentalkatalog des Berliner Astronomischen Jahrbuchs. II. Die Zusatzsterne für die Epochen 1950, Abh. Preuß. Akad. Wiss. Phys.-math. Kl., 3

Krüger A., 1883, Zonenbeobachtungen der Sterne zwischen 55° unf 65° Nördlicher Declination angestellt an den Sternwarten zu Helsingfors und Gotha und auf kosten der Kaiserlichen Alexanders-universitat zu Helsingfors, Helsingfors 

Morin D., 1973, Table of Correspondences SAO/HD/DM/GC, Obs. de Meudon, unpublished  (4004)

Ochsenbein F., Bischoff M., Egret D., 1981, Microfiche Edition of CSI, Astron. Astrophys. Suppl. Ser., 43, 259-264 (4009)

Perrine C.D., 1911a, Catalogo de 5791 estrellas para 1900.0. II. Catalogo General Argentino, Res. Obs. Nacional Argentino, 20, 1

Perrine C.D., 1911b, Secundo Catalogo General Argentino. Estrellas Borealis, Res. Obs. Nacional Argentino, 20, 106

Perrine C.D., 1932, Córdoba Durchmusterung, Res. Obs. Nacional Argentino, 21(II), 1-140

Rogers W.A., 1892, Catalogue of 8627 Stars, Ann. Astron. Obs. Harvard Coll., 15(II)

Roman N.G., Warren W.H. Jr, Schofield N.J. Jr, 1983, Documentation for the Machine-readable Version of the SAO-HD-GC-DM Cross Index, Version 1983, NSSDC/WDC-A 83-17 (4012)

Schilt J., Hill S.J., 1937, Photographic Magnitudes of 6,902 Stars in the Zone +55° to +60°, Contr. Rutherford Obs., 30

Schilt J., Hill S.J., 1938, Photographic Magnitudes of 7,280 Stars in the Zone +50° to +55°, Contr. Rutherford Obs., 31

Schlesinger F., Barney I., 1939-59, Yale Zone Catalog, Trans. Astron. Obs., Yale Univ., 11-14, 16-22, 24-27

Schönfeld E., 1886, Bonner Sternverzeichniss, Sec. 4, Astron. Beob. Sternw. Königl. Rhein, 8 (1119)  

Schorr R., Kohlschütter A., 1951-58, Zweiter Katalog der Astronomischen Gesellschaft für das Äquinoktium 1950. Örter der Sterne bis zur neuten Größe zwischen dem Nordpol und 2° Südlicher Deklination, Sternwarten Bergedorf und Bonn, 15 vols. 

Spencer Jones H., 1928, Catalogue of 4569 stars: first Cape Catalogue of stars for the equinox 1925.0, R. Obs., Cape of Good Hope

Spencer Jones H., Jackson J., 1936, Proper Motions of Stars in the Zone Catalogue of 20,843 Stars, 1900, R. Obs., Cape of Good Hope (1005)

Stoy R.H., 1966-68, The Cape Photographic Catalogue for 1950.0, Ann. Cape Obs., XXI-XXII

Thome J.M., 1892-1914, Córdoba Durchmusterung, Res. Obs. Nacional Argentino, 16, 17, 18-21

Worley C.E., 1980, Background and Status of the Double Star Catalogue, CDS Inf. Bull., 18, 20-24

 

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For more information please contact M. SARASSO

 
AC2000 AC2000.2 ACRS ACT AGK3 AGK3R AGK3U BD BDSUP BESTARS BSC4 BSC4S BSC5 CAMC CAMC1-11 CCDM CD CNS3 COU CPC2 CPD ESOSPL FK4 FK4S FK4SUP FK5 FK5E GC GCTP4 GCVS3 GCVS4 GSC1 GSPC1 GSPC2 HD HIC HIC_ANNEX1 HIPPARCOS INTERFER IRAS2 IRS LANDOLT92 LHS NED NGP9 NGPFG NLTT NPM1 NPM1G ORBITE PERTH70 PERTH75 PERTH83 PLEIADES POSS1 PPM PPMBS PPMSUP RC3 RVBSS SAO SD SPM2 TYC TYC2 UBV UCAC1 UCAC2 WDS WDS2


Last update: 24/02/05