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HD 115865


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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.

Observations of double stars and new pairs. XIV
Results of a continuing survey of visual double stars are presented,including 4880 measurements made from February 1987 to November 1989.The positions in WDS format and Durchmusterung numbers are given for 194pairs first reported here. Micrometer measurements of 1142 doubles madewith the Swarthmore 61 cm refractor are presented. Magnitudes areestimated for some of the objects. Plate measurements, plateorientations, position angles, number of nights, and measured exposuresare given. Visual observations of 342 pairs obtained in May 1989 atCerro Tololo, mostly with the 1.0 m reflector, are reported.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Sinek
Sað Açýklýk:13h21m37.07s
Yükselim:-66°29'33.5"
Görünürdeki Parlaklýk:9.834
özdevim Sað Açýklýk:-10.7
özdevim Yükselim:-30.8
B-T magnitude:10.6
V-T magnitude:9.898

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 115865
TYCHO-2 2000TYC 9002-1260-1
USNO-A2.0USNO-A2 0225-16697054
HIPHIP 65193

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