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HD 137739

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Mesures d'etoiles doubles faites aux lunettes de 74 et 50 CM de l'Observatoire de la Cote d'Azur We give 657 measurements of double stars, Table 1 by R. Gili with CCDcamera, Table 2 by P. Couteau with filar micrometer. Tables 1 and 2 areonly available in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html.
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
Mesures d'etoiles doubles faites a Nice, etoiles doubles nouvelles (24eme serie) decouvertes a Nice. Table 1 gives 1182 measurements of 682 binaries observed with the 74 and50 cm refractors. Table 2 lists 26 new binaries discovered with the 50cm refractor.
ICCD speckle observations of binary stars. V - Measurements during 1988-1989 from the Kitt Peak and the Cerro Tololo 4 M telescopes Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1990AJ.....99..965M&db_key=AST
Binary star measurements made at Nice with the 50-cm reflector Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1989A&AS...77..125L&db_key=AST
Measurements of double stars at Nice with 74-cm and 50-cm refractors A total of 717 measures of 287 binaries made at the 74-cm and 50-cmrefractors are presented. These are mostly very close binariesdiscovered recently, for which a rapid orbital motion is evident forabout 30 percent.
Measurements of double stars made at Nice Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975A&AS...20..391C&db_key=AST
Etoiles doubles nouvelles (6^{e} série). Découvertes à Nice avec la lunette de 50 CM Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....5..167C&db_key=AST
La recherche,d'etoiles doubles. SA motivation. Not Available

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Osservazione e dati astrometrici

Costellazione:	Corona Boreale
Ascensione retta:	15^h26^m47.13^s
Declinazione:	+28Â°40'03.9"
Magnitudine apparente:	9.032
Moto proprio RA:	-13
Moto proprio Dec:	-17.7
B-T magnitude:	9.859
V-T magnitude:	9.101

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 137739
TYCHO-2 2000	TYC 2032-1539-1
USNO-A2.0	USNO-A2 1125-07268250
HIP	HIP 75602

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