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HD 127580


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Speckle Interferometry at the US Naval Observatory. VI.
The results of 1068 speckle interferometric observations of doublestars, made with the 26 inch (0.66 m) refractor of the US NavalObservatory, are presented. These observations are averaged into 841means of 815 binary stars. The systems range in separation from 0.22" to6.01" with a mean separation of 2.21" and have a limiting secondarymagnitude of V=12.5. This is the sixth in a series of papers presentingmeasures obtained with this system, and it covers the period 1999January 1 through 2000 January 9.

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.

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Osservazione e dati astrometrici

Costellazione:Bilancia
Ascensione retta:14h32m32.68s
Declinazione:-13°00'14.1"
Magnitudine apparente:9.399
Distanza:107.875 parsec
Moto proprio RA:-47.2
Moto proprio Dec:10.6
B-T magnitude:10.17
V-T magnitude:9.463

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 127580
TYCHO-2 2000TYC 5571-968-1
USNO-A2.0USNO-A2 0750-08524868
HIPHIP 71113

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