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HD 231518


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Observations of double stars and new pairs. XIV
Results of a continuing survey of visual double stars are presented,including 4880 measurements made from February 1987 to November 1989.The positions in WDS format and Durchmusterung numbers are given for 194pairs first reported here. Micrometer measurements of 1142 doubles madewith the Swarthmore 61 cm refractor are presented. Magnitudes areestimated for some of the objects. Plate measurements, plateorientations, position angles, number of nights, and measured exposuresare given. Visual observations of 342 pairs obtained in May 1989 atCerro Tololo, mostly with the 1.0 m reflector, are reported.

Micrometric Measures of Double Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974ApJS...28..413V&db_key=AST

Mesures d'étoiles doubles faites à Nice
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....6..185C&db_key=AST

Micrometer measures of doubles stars. III.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963AJ.....68...57V&db_key=AST

Spectral Classification of Stars Noted on Case Objective Prism Plates. II
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Osservazione e dati astrometrici

Costellazione:Aquila
Ascensione retta:19h28m22.50s
Declinazione:+16°17'17.6"
Magnitudine apparente:9.108
Moto proprio RA:-9.2
Moto proprio Dec:8.1
B-T magnitude:9.694
V-T magnitude:9.157

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 231518
TYCHO-2 2000TYC 1601-483-1
USNO-A2.0USNO-A2 1050-13903569
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