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HD 234530

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ICCD Speckle Observations of Binary Stars. XVII. Measurements During 1993-1995 From the Mount Wilson 2.5-M Telescope. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1997AJ....114.1639H&db_key=AST
Binary star speckle measurements during 1989-1993 from the SAO 6 M and 1 M telescopes in Zelenchuk We have continued to survey visual and interferometric binary stars withsignificant orbital motion by means of speckle method at the telescopesof the Special Astrophysical Observatory (SAO) in Zelenchuk. Here wepresent the lists of 267 speckle observations made with the 6 m and the1 m telescopes in the period May 1989-November 1993.
Measurements of close binaries performed at PIC DU Midi A total of 241 measurements of 119 close binaries observed with the 2-mTelescope Bernard Lyot at Pic du Midi Observatory are given. Themeasurements were performed with a micrometer with illuminated wires.
New double stars (21st series) discovered at Nice Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1988A&AS...75..163C&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Dragone
Ascensione retta:	17^h59^m50.43^s
Declinazione:	+50Â°39'10.7"
Magnitudine apparente:	9.136
Moto proprio RA:	-22.1
Moto proprio Dec:	86.6
B-T magnitude:	10.135
V-T magnitude:	9.219

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 234530
TYCHO-2 2000	TYC 3523-55-1
USNO-A2.0	USNO-A2 1350-09447161
HIP	HIP 88119

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