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HD 172806


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Binary stars unresolved by speckle interferometry. III
The KPNO's 4-m telescope was used in 1975-1981 to determine the epochsof 1164 speckle observations for 469 unresolved, known or suspectedbinary stars. The data, presented in tabular form, encompass visualbinaries with eccentric orbits, occultation binaries, astrometricbinaries, Hyades stars of known or suspected duplicity, and many longperiod spectroscopic binaries.

Spectral Classification of the Late Component of Stars with Composite Spectra
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Peculiar and Metallic-Line a - Stars in a Galactic Zone.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959ApJ...129...88S&db_key=AST

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Observation and Astrometry data

Constellation:Schlange
Right ascension:18h42m06.24s
Declination:+04°02'03.6"
Apparent magnitude:8.022
Distance:261.097 parsecs
Proper motion RA:0.6
Proper motion Dec:-13.7
B-T magnitude:8.104
V-T magnitude:8.029

Catalogs and designations:
Proper Names
HD 1989HD 172806
TYCHO-2 2000TYC 455-257-1
USNO-A2.0USNO-A2 0900-13473511
HIPHIP 91705
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