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HD 220487


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Precise positions, separations, and position angles of visual binaries
Astrometric observations of 212 large visual binaries are reported. Dataobtained with a GG 495 yellow filter on IIaD photographic plates usingthe Zen astrograph (aperture 20 cm and focal length 2077 mm) of theOsservatorio Astronomico di Brera during 1985-1986 are presented inextensive tables. The potential significance of these measurements forthe catalog being constructed for the Hipparcos space observatory isindicated.

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Observation and Astrometry data

Constellation:Ιχθείς
Right ascension:23h24m04.40s
Declination:+04°55'53.0"
Apparent magnitude:7.684
Distance:184.843 parsecs
Proper motion RA:18.7
Proper motion Dec:-11.2
B-T magnitude:8.127
V-T magnitude:7.721

Catalogs and designations:
Proper Names
HD 1989HD 220487
TYCHO-2 2000TYC 581-129-1
USNO-A2.0USNO-A2 0900-20395570
HIPHIP 115524

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