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HD 117009

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ICCD Speckle Observations of Binary Stars. XVI. Measurements During 1982-1989 from the Perkins 1.8-M Telescope. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1997AJ....114.1623F&db_key=AST
ICCD Speckle Observations of Binary Stars. XII. Measurements During 1984-1986 From the Perkins 1.8 M Telescope Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....111..393A&db_key=AST
ICCD speckle observations of binary stars. II - Measurements during 1982-1985 from the Kitt Peak 4 M telescope This paper represents the continuation of a systematic program of binarystar speckle interferometry initiated at the 4 m telescope on Kitt Peakin late 1975. Between 1975 and 1981, the observations were obtained witha photographic speckle camera, the data from which were reduced byoptical analog methods. In mid-1982, a new speckle camera employing anintensified charge-coupled device as the detector continued the programand necessitated the development of new digital procedures for reducingand analyzing speckle data. The camera and the data-processingtechniques are described herein. This paper presents 2780 newmeasurements of 1012 binary and multiple star systems, including thefirst direct resolution of 64 systems, for the interval 1982 through1985.
Interferometer observations of double stars. III Position angles and separations rho of 98 binaries were measured in 1982with a photoelectric phase-grating interferometer on 60-, 70-, 100-,260-cm reflectors. For the 100-cm, the rms error in both coordinates isabout 0.007 arcsec. Eight stars remain unresolved.
Photographic measures of double stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&AS...31..121A&db_key=AST
Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice Not Available

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Osservazione e dati astrometrici

Costellazione:	Chioma di Berenice
Ascensione retta:	13^h27^m10.68^s
Declinazione:	+20Â°27'43.4"
Magnitudine apparente:	10.656
Moto proprio RA:	-3
Moto proprio Dec:	-1.3
B-T magnitude:	11.271
V-T magnitude:	10.707

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 117009
TYCHO-2 2000	TYC 1464-865-2

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