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HD 206719

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Binary Star Orbits. II. Preliminary First Orbits for 117 Systems Orbital elements are presented for 117 binary systems with no previousorbit calculation. For nearly all of these systems, these elements mustbe regarded as preliminary, but the ephemerides presented here should berelatively accurate over the next several decades. Further, the analysisof these systems should highlight the need for their continuedobservation by dedicated programs to improve the veracity of theseelements.
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.
Binary star measurements made at Pic-du-Midi The 2-m Pic-du-Midi telescope has been used to obtain 130 visualmeasurements of 64 very close binaries. The measurements were made withan illuminated cross wire micrometer which provided magnificationfactors of 2500 to 5000. Data are presented in tabular form for suchmeasurements as total visual magnitude, angular position andseparations, and period.
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 aux lunettes de 50 et de 74 CM Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970A&AS....3...51C&db_key=AST
The masses of stars above the main sequence. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969AJ.....74..689S&db_key=AST
Mesures d'etoiles doubles faites a Nice a la lunette de 50 cm. Not Available
Micrometer measures of double stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1962AJ.....67..141V&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Pegaso
Ascensione retta:	21^h43^m25.98^s
Declinazione:	+23Â°53'05.3"
Magnitudine apparente:	9.196
Moto proprio RA:	-4.5
Moto proprio Dec:	-10.9
B-T magnitude:	9.654
V-T magnitude:	9.234

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 206719
TYCHO-2 2000	TYC 2189-1566-1
USNO-A2.0	USNO-A2 1125-18711584
HIP	HIP 107254

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