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HD 33074


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Close visual binaries. I - MK classifications
Each component of 170 close visual binaries has been classified with newprocedures for controlling contamination problems. These classificationsare presented and are shown to be on the MK system. Two sources of areascanner UBV photometry were compared in order to establish homogeneousphotometric as well as spectroscopic data. From a consideration ofsystematic errors in the V magnitude difference (Delta V) betweencomponents the photometry of Hurly and Warner (1983) is to be preferred.Absolute magnitudes for each binary are derived from Delta V via atested MK - M(v) map.

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Observation and Astrometry data

Constellation:Columba
Right ascension:05h06m02.82s
Declination:-37°57'45.1"
Apparent magnitude:8.658
Distance:316.456 parsecs
Proper motion RA:6.5
Proper motion Dec:0.7
B-T magnitude:10.263
V-T magnitude:8.791

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 33074
TYCHO-2 2000TYC 7587-1-1
USNO-A2.0USNO-A2 0450-01845297
HIPHIP 23725

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