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HD 50578


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UBV photometry of stars whose positions are accurately known.
Photometric indices V, B-V, and U-B were measured for about 560 stars ofthe AGK3R and NPZT catalogs between BD declinations 11 deg and 23 deg,using the 40-cm Cassegrain telescope of the Kvistaberg Observatory fromApril 1986 to May 1987. The observation procedure and the reductiontechnique were the same as in the earlier papers of this series by Oja(1984, 1985, 1986, and 1987). The mean errors were calculated from theinternal consistency of the data. The accuracy was found to be the sameas for the earlier parts of the survey.

Illinois occultation summary. I - 1977-1978
Results are presented for the first two years of a program for therecording of lunar occultations primarily of bright stars or objects ofspecial interest. Observations were obtained using a single-channelCassegrain photometer at a 1-m reflector using various filters toprovide spectral definition, with the tracking of guide stars used toachieve telescope pointing. Of the 64 events observed, 30 were of starsbrighter than 7 magnitudes, 40 were reappearances, four were used forangular diameter measurements, eight were binary star observations andsix may indicate multiple stars.

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Observation and Astrometry data

Constellation:Δίδυμοι
Right ascension:06h54m39.54s
Declination:+17°41'03.8"
Apparent magnitude:7.749
Distance:384.615 parsecs
Proper motion RA:-1.3
Proper motion Dec:-8.7
B-T magnitude:9.844
V-T magnitude:7.922

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 50578
TYCHO-2 2000TYC 1335-602-1
USNO-A2.0USNO-A2 1050-04509125
HIPHIP 33203

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