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Strömgren H? Photometry of O and B Stars in Norma
This investigation presents a study of the Galactic structure toward theNorma section of the Milky Way. The field studied is located between325° and 335° Galactic longitude and -8° to 8° Galactic latitude. New observations in the uvby? system are combined with all uvby? data currently available to collate a sample of 130 O and B stars. A uniform procedure is applied to obtain the color excesses and stellardistances for all of the stars in the sample. The sample is magnitudelimited to about V=9.5 mag and contains the brightest stars of the openclusters NGC 6087 and Ly 6, the field 2158 of Loden, the OB associationNor OB1, and stars located in the directions of R 103 and R 105. Theintrinsically luminous stars in the field studied appear to be closer tothe Sun than it has previously been thought. At about 860 pc, themajority of the stars in the sample delineate a segment consistent withthe location of the Sagittarius-Carina arm as suggested in the four-armmodel representation of the grand design of the Milky Way. A small partof the sample defines the near edge of the Scutum-Crux arm at about 1.75kpc.
| A uvby, beta photometric survey of southern hemisphere
A uvby, beta photometric study of southern hemisphere eclipsing binarystars has been undertaken at Cerro Tololo Inter-American Observatory.The standardized colors and V magnitudes for 288 binaries at quadratureand/or at minimum are presented, along with an indication of theaccuracy of the standardization and photometry. Discussions of theresolving time of the pulse-counting photometers and of the atmosphericextinction at CTIO are included.
| The Variability of PQ Normae = BV 1556 = HD 148013
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| 61st Name-List of Variable Stars
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| Mitteilungen uber Veraenderliche der Bamberger Liste.
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Membre dels grups següents:
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Dades d'Observació i Astrometria
| Constel·lació: | Norma |
| Ascensió Recta: | 16h28m16.44s |
| Declinació: | -57°12'41.9" |
| Magnitud Aparent: | 7.711 |
| Distancia: | 245.098 parsecs |
| Moviment propi RA: | -2.9 |
| Moviment propi Dec: | -14 |
| B-T magnitude: | 7.75 |
| V-T magnitude: | 7.715 |
Catàlegs i designacions:
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