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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).
Not Available

UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue.
Not Available

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.
Not Available

Fainter Standards for VRI Photometry in the E Regions
Not Available

Standard magnitudes in the E regions.
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观测天体数据

星座:時鐘座
右阿森松:04h01m17.63s
赤纬:-46°08'14.4"
视星:7.237
距离:251.256 天文距离
右阿森松适当运动:-1.2
赤纬适当运动:13.8
B-T magnitude:8.541
V-T magnitude:7.345

目录:
适当名称   (Edit)
HD 1989HD 25537
TYCHO-2 2000TYC 8068-1502-1
USNO-A2.0USNO-A2 0375-01322754
HIPHIP 18771

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