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TYC 198-1980-1


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Hipparcos astrometry for 257 stars using Tycho-2 data
We present improved Hipparcos astrometry for 257 Hipparcos stars,resolved into 342 components. For 64 of the stars no astrometry wasobtained in the Hipparcos Catalogue, while for the remaining starsadditional components have been added by this solution or the positionshave been revised considerably. We have used the published Hipparcostransit data for the new solutions, together with results from thesecond reduction of the Tycho data for defining better initial values.Based on observations made with the ESA Hipparcos astrometry satellite.Table 3 is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

Photographic astrometry of binar and proper-motion stars: 8.
300 trigonometric parallaxes, 15 revised binary-star orbits, and 24 massratios are listed and annotated.

Micrometer observations of double stars and new pairs. XIII
From a program of double star observations which emphasizes orbital,neglected, and newly discovered pairs, results obtained from October1984 to January 1987 are presented. A total of 3030 visual and 550photographic measures are listed. The positions in WDS format andDurchmusterung numbers are shown for 117 pairs for which firstobservations appear in this paper. Magnitudes are estimated for some ofthe objects.

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 au réfracteur de 38 cm de l'Observatoire de Nice
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Mesures d'étoiles doubles effectuées au réfracteur de 38 cm. de l'Observatoire de Nice
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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Kucuk Kopek
Sað Açýklýk:08h06m15.16s
Yükselim:+02°00'47.3"
Görünürdeki Parlaklýk:11.002
özdevim Sað Açýklýk:-7.5
özdevim Yükselim:7.3
B-T magnitude:11.659
V-T magnitude:11.057

Kataloglar ve belirtme:
Özgün isimleri
TYCHO-2 2000TYC 198-1980-1
USNO-A2.0USNO-A2 0900-05717434
HIPHIP 39653
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