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HD 239355


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Diffraction-limited speckle masking interferometry of binary stars with the SAO 6-m telescope.
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Binary star speckle measurements during 1989-1993 from the SAO 6 M and 1 M telescopes in Zelenchuk
We have continued to survey visual and interferometric binary stars withsignificant orbital motion by means of speckle method at the telescopesof the Special Astrophysical Observatory (SAO) in Zelenchuk. Here wepresent the lists of 267 speckle observations made with the 6 m and the1 m telescopes in the period May 1989-November 1993.

Interferometric observations of double stars in 1986-1990
A tabulation is presented for the measurements of double stars that havebeen conducted with the photometric phase-grating interferometer of theMt. Sanglok 1-m reflector. The tabulation encompasses the observationepoch, the position angle, the separation in arcsec, the magnitudedifference, formal errors in P.A. and separation, SAO number, andcoordinates for 2000.0.

Catalogue of proper motions in the declination of stars of the Moscow zenith zone.
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Interferometric Observations of Double Stars in 1985 and 1986
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1988A&AS...72..563T&db_key=AST

UBV Photometry of Stars whose Positions are Accurately Known
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984A&AS...57..357O&db_key=AST

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Observation and Astrometry data

Constellation:Cygnus
Right ascension:20h14m00.65s
Declination:+55°57'11.3"
Apparent magnitude:8.819
Distance:265.252 parsecs
Proper motion RA:17.3
Proper motion Dec:17
B-T magnitude:9.226
V-T magnitude:8.853

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 239355
TYCHO-2 2000TYC 3941-919-1
USNO-A2.0USNO-A2 1425-10438502
HIPHIP 99715
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