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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
Mesures d'etoiles doubles faites a Nice (5eme serie. Double star measurements made at Nice We present the last observations from two lists: General program and MLRpairs, made with the 50~cm refractor of Nice Observatory.
Observations of Double Stars and New Pairs. XVII. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996ApJS..105..475H&db_key=AST
The HIPPARCOS multiple stars: reduction methods and preliminary results. This paper presents the first results obtained on a sample of multiplestars observed by Hipparcos, by two independent reduction methods (theGlobal Fitting approach and the Scanning Angle Functions method) on thebasis of the data collected during the first 30 months of the mission.The preliminary results on a set of 10 triple stars are shown anddiscussed in detail.
ICCD speckle observations of binary stars. IV - Measurements during 1986-1988 from the Kitt Peak 4 M telescope One thousand five hundred and fifty measurements of 1006 binary starsystems observed mostly during 1986 through mid-1988 by means of speckleinterferometry with the KPNO 4-m telescope are presented. Twenty-onesystems are directly resolved for the first time, including newcomponents to the cool supergiant Alpha Her A and the Pleiades shellstar Pleione. A continuing survey of The Bright Star Catalogue yieldedeight new binaries from 293 bright stars observed. Corrections tospeckle measures from the GSU/CHARA ICCD speckle camera previouslypublished are presented and discussed.
Micrometer Observations of Double Stars and New Pairs - Part Ten Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
Micrometer observations of double stars.8. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJS...29..315H&db_key=AST
Mesures d'étoiles doubles effectuées au réfracteur de 38 cm de l'Observatoires de Nice Not Available

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Pozíciós és asztrometriai adatok

Csillagkép:	Cefeusz
Rektaszcenzió:	21^h47^m45.40^s
Deklináció:	+62Â°03'24.3"
Vizuális fényesség:	8.516
Távolság:	281.69 parszek
RA sajátmozgás:	14.3
Dec sajátmozgás:	7.4
B-T magnitude:	8.8
V-T magnitude:	8.54

Katalógusok és elnevezések:

Megfelelő nevek	(Edit)
HD 1989	HD 207577
TYCHO-2 2000	TYC 4266-3259-1
USNO-A2.0	USNO-A2 1500-08408647
HIP	HIP 107611

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