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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.

Observations of double stars and new pairs. XV
The study reports visual and photographic measures listed for 1150 pairsobtained in the time frame 1989.91-1992.15, including 221 new doublestars. Magnitudes were estimated for a part of the objects, especiallythe fainter ones. Plate orientations were calculated from field stars ofknown positions and were precessed to the epoch; numbers of nights andof measured exposures are given. Reobservation of faint, neglected pairsreveal many corrections to the data from the old discovery lists.

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

Mikrometermessungen von Doppelsternen. VI.
Not Available

Measures of 241 double stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1960AJ.....65..156W&db_key=AST

Mesures d'étoiles doubles faites à l'Observatoire de Paris
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Mesures d'étoiles doubles faites au réfracteur de 38 cm. de l'Observatoire de Nice
Not Available

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Dades d'Observació i Astrometria

Constel·lació:Sextans
Ascensió Recta:09h43m29.38s
Declinació:+06°12'27.7"
Magnitud Aparent:8.93
Distancia:159.49 parsecs
Moviment propi RA:-23.4
Moviment propi Dec:-37.4
B-T magnitude:9.335
V-T magnitude:8.964

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 84196
TYCHO-2 2000TYC 242-1526-1
USNO-A2.0USNO-A2 0900-06487566
HIPHIP 47696

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