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HD 19096


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CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars
Context: We measured the angular separations, position angles, ΔV, Δ y and Δ I of wide visual double stars during the period2003-2005. At least one component of the double stars in our sample hasan entry in the Hipparcos catalogue. Aims: Our measurements are acontribution to the study of the nature of these double stars. Methods: The northern double stars of the project were observed with the1.2 m telescope of the Kryonerion observatory and the southern with the1.0 m SAAO. We performed multiple-exposure CCD imaging of our targetsand used the standard procedure of data reduction and astrometric CCDcalibrations. Results: We present measurements of 213 northern and 219southern wide binaries.Based on observations made at Kryonerion Observatory of the NationalObservatory of Athens, Greece, and the South African AstronomicalObservatory. Full Table 1 and Tables 2, 3 are only available inelectronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/472/1055

A second list of wide visual binaries
Not Available

A second list of wide visual binaries
Not Available

Interferometric observations of double stars in 1983 and 1984
Position angles and separations of visual binary stars have beenmeasured with a photoelectric phase-grating interferometer on the 1-mreflector on Mt. Sanglok. The observational technique is brieflydescribed. The 134 measurements of 123 pairs with rho of between 0.05and 0.07 arcsec and the residuals from the ephemerides are given. HR 813= Mu Cet has been resolved interferometrically for the first time.

Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.

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Observation and Astrometry data

Constellation:Éridan
Right ascension:03h03m47.04s
Declination:-21°21'41.2"
Apparent magnitude:7.452
Distance:57.078 parsecs
Proper motion RA:197.2
Proper motion Dec:-34.3
B-T magnitude:8.559
V-T magnitude:7.544

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 19096
TYCHO-2 2000TYC 5871-53-1
USNO-A2.0USNO-A2 0675-01047630
HIPHIP 14249

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