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HD 4545


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UBV photometry of wide visual double stars. V. Double stars with mainly K- and M- type primaries.
We present UBV photometric observations of 55 wide visual double starswith K- and M- type primaries. Our observations have been compared andcombined with information available in the literature. At least 58% ofthem are optical pairs.

Uvby-beta photometry of visual double stars - Absolute magnitudes of intrinsically bright stars
Individual absolute visual magnitudes M(v) are derived for intrinsicallybright stars and evolved stars. The results are collected for 106objects believed to be members of binary systems. uvby-beta photometrywas empirically calibrated in terms of M(v) for main sequence stars andphotoelectrically determined apparent magnitudes. The derived M(v)values are not significantly different from those stated in the Wilsoncatalogue (1976). Binary systems with main sequence primaries andsecondary components off the main sequence were also investigated.Several systems in which at least one component may be in the pre-mainsequence contraction stage are pointed out. A wide variety of commentsand derived data are given individually for 136 double stars, includingmetallicities, distance moduli, and masses.

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Observation and Astrometry data

Constellation:ほうおう座
Right ascension:00h46m46.60s
Declination:-52°00'13.6"
Apparent magnitude:8.658
Distance:675.676 parsecs
Proper motion RA:1.8
Proper motion Dec:7.8
B-T magnitude:9.976
V-T magnitude:8.767

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 4545
TYCHO-2 2000TYC 8037-1142-1
USNO-A2.0USNO-A2 0375-00242773
HIPHIP 3653

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