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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.

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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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Membre dels grups següents:

Dades d'Observació i Astrometria

Constel·lació:Sagittarius
Ascensió Recta:20h03m58.15s
Declinació:-44°38'19.3"
Magnitud Aparent:8.333
Distancia:568.182 parsecs
Moviment propi RA:35.2
Moviment propi Dec:-20.4
B-T magnitude:9.694
V-T magnitude:8.446

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 189855
TYCHO-2 2000TYC 7959-865-1
USNO-A2.0USNO-A2 0450-38507414
HIPHIP 98798
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