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HD 105784

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관련 글

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.
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.
Atmospheric extinction in the /U-B/ color index Various methods for obtaining the atmospheric extinction in the (U-B)color index taking into account the dependence of extinction coefficienton the intrinsic color index of the star are examined. Numericalintegrations are performed to determine synthetic color indices for 32stars of spectral classes O9 to M0 and luminosity classes I, III and Vthrough 0, 1 and 2 air masses, resulting in three (u-b) color indicesfor each star. Photometric reduction of the color indices to the (U-B)color index was then performed by the classical method, by the methodproposed by Gutierrez-Moreno et al. (1966) and various modifications ofit, and by the method proposed by Moffat and Vogt (1977). Comparisonwith observations of 71 stars in the standard region E5, nine extinctionstandard stars and 25 Johnson standard stars in the UBV reveals that thereduction of (U-B) by the classical method gives internal errors betweentwo and three times larger than those obtained for (B-V) and V, whilethe methods of Gutierrez-Moreno et al. and Moffat and Vogt providegreatly improved accuracy.
DDO Observations of Southern Stars Not Available
Photoelectric standards of intermediate brightness in the E-regions. I. UBV photometry. Not Available
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. Not Available

관련 링크

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관측 및 측정 데이터

별자리:	켄타우루스자리
적경:	12^h10^m39.92^s
적위:	-46Â°31'45.4"
가시등급:	8.352
거리:	332.226 파섹
적경상의 고유운동:	-15.1
적위상의 고유운동:	-5.9
B-T magnitude:	9.633
V-T magnitude:	8.458

천체목록:

일반명	(Edit)
HD 1989	HD 105784
TYCHO-2 2000	TYC 8229-2807-1
USNO-A2.0	USNO-A2 0375-15321433
HIP	HIP 59358

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