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HD 21866


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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.

Micrometer Measurements of Visual Double Stars Obtained at the Nice and Pic-Du Observatories
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987A&AS...71..115L&db_key=AST

Visual double stars measured at Lick Observatory Mount Hamilton, California.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1979PASP...91..479H&db_key=AST

Mikrometermessungen von Doppelsternen. VI.
Not Available

Measures of 313 doubles stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963AJ.....68..114W&db_key=AST

Micrometer Measures of Double Stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959ApJS....4...45V&db_key=AST

Measures of 266 double stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1957AJ.....62..153W&db_key=AST

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Observation and Astrometry data

Constellation:Ταύρος
Right ascension:03h31m45.67s
Declination:+07°48'57.5"
Apparent magnitude:8.408
Proper motion RA:-33.1
Proper motion Dec:-24
B-T magnitude:8.947
V-T magnitude:8.453

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 21866
TYCHO-2 2000TYC 650-489-1
USNO-A2.0USNO-A2 0975-00770200
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