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HD 189855


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Photometric observations of emission B-stars in the southern Milky Way
In order to study the distribution of Be stars and their correlation tothe local spiral structure of the Galaxy photoelectric UBV photometrywas carried out for a total of 488 Be stars located in the southernMilky Way between galactic longitudes 315 and 45 deg. UBV magnitudes arepresented for these stars.

Photometric reductions and the lightcurve of (51) NEMAUSA
The light curve of the minor planet (51) Nemausa is derived on the basisof 1779 photoelectric (B and V) observations and a photometric reductionusing a rigorous least squares method. Separate light curves are givenfor the B and V observations, respectively. An absolute B-V magnitudefor (51) Nemusa of 0.787 + or - 0.004 mag was estimated. A detaileddescription of the least squares method is presented.

UBV photometry of E region standard stars of intermediate brightness
Photometry data are given for 335 stars in the nine E regions.Observations were made using a photometer and filters on the 47 cmreflector at Cape Town. The stellar dispersions are summarized. Data arepresented in tabular form.

Photometric standard stars for the UBV and (RI)KC systems.
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Fainter Standards for VRI Photometry in the E Regions
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Standard magnitudes in the E regions.
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Miembro de los siguientes grupos:

Datos observacionales y astrométricos

Constelación:Sagitario
Ascensión Recta:20h03m58.15s
Declinación:-44°38'19.3"
Magnitud Aparente:8.333
Distancia:568.182 parsecs
Movimiento Propio en Ascensión Recta:35.2
Movimiento Propio en Declinación:-20.4
B-T magnitude:9.694
V-T magnitude:8.446

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 189855
TYCHO-2 2000TYC 7959-865-1
USNO-A2.0USNO-A2 0450-38507414
HIPHIP 98798
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