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HD 154383


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A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association
B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.

Photoelectric observations of lunar occultations. XI
Occultation observations of 466 events are presented. These includediameter measures of Aldebaran under very bad conditions and a gooddiameter measure of 82 Vir. The list includes 91 reappearances andobservations of 34 double or multiple stars, both new and previouslyknown. The inconsistencies of the observations of Kui 88 are discussed.Further observations are most desirable.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Yilanci
Sað Açýklýk:17h05m48.36s
Yükselim:-18°06'58.1"
Görünürdeki Parlaklýk:7.875
Uzaklýk:806.452 parsek
özdevim Sað Açýklýk:-1.4
özdevim Yükselim:-7.1
B-T magnitude:8.015
V-T magnitude:7.887

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 154383
TYCHO-2 2000TYC 6236-1164-1
USNO-A2.0USNO-A2 0675-17770150
HIPHIP 83649

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