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HD 112372


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A preliminary compilation of DS-programme star positions
A catalog is presented of the double-star-program (DS-program) starpositions, listing right ascensions for 930 DSs and declinations for1225 DSs of the program. The positions were compiled from the observedvalues obtained between 1980 and 1987 with the meridian circles of sixUSSR observatories (the Moscow, Kazan', Kiev, Khar'kov, Odessa, andTashkent Observatories) and the Belgrade Observatory. The measurementsand the treatment of the observational material were performed using therelative method, and the FK-4 system stars were used as reference stars.

Visual multiples. VII - MK classifications
Classifications are given for 865 components of visual multiples; theyshow no systematic differences from the MK system, and the random errorsare one subclass in type and two-thirds of a luminosity class. It isfound that at least 1% of the F-type IV and V stars are weak-lined, 32%of the A4-F1 IV and V stars are Am, and 5% of the A0-A3 IV and V starsare early-type Am. Attention is called to the large fraction (55%) ofthe A3-A9 III-V stars that are of luminosity classes III or IV, unlikethe percentage (16%) at neighboring types.

Photographic measurements of double stars
In this paper the relative distances and position angles of thecomponents of 170 mostly southern visual double stars are presented. Theresults are obtained using photographic plates taken with the 60 cmdouble refractor of the Bosscha Observatory, Lembang, Indonesia.

Micrometer observations of double stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1956MNRAS.116..248H&db_key=AST

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Observation and Astrometry data

Constellation:Virgo
Right ascension:12h56m15.01s
Declination:-04°51'50.3"
Apparent magnitude:7.17
Distance:170.358 parsecs
Proper motion RA:-58.7
Proper motion Dec:19.8
B-T magnitude:7.23
V-T magnitude:7.175

Catalogs and designations:
Proper Names
HD 1989HD 112372
TYCHO-2 2000TYC 4953-1225-1
USNO-A2.0USNO-A2 0825-07870139
HIPHIP 63139

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