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HD 25537


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New aperture photometry for 217 galaxies in the Virgo and Fornax clusters.
We present photo electric multi-aperture photometry in UBVRI of 171 and46 galaxies in the Virgo and Fornax clusters, respectively. Many of thegalaxies have not been observed in at least one of these passbandsbefore. We discuss the reduction and transformation into the Cousinsphotometric system as well as the extinction coefficients obtainedbetween 1990 and 1993.

Secondary standards for H-beta photometry in the Southern Hemisphere (second series).
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UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue.
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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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Dades d'Observació i Astrometria

Constel·lació:Horologium
Ascensió Recta:04h01m17.63s
Declinació:-46°08'14.4"
Magnitud Aparent:7.237
Distancia:251.256 parsecs
Moviment propi RA:-1.2
Moviment propi Dec:13.8
B-T magnitude:8.541
V-T magnitude:7.345

Catàlegs i designacions:
Noms Propis
HD 1989HD 25537
TYCHO-2 2000TYC 8068-1502-1
USNO-A2.0USNO-A2 0375-01322754
HIPHIP 18771
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