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HD 121287


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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

Photographic observations of visual double stars.
We present the results of photographic observations of 399 visual doublestars of the Hipparcos Input Catalogue (HIC), observed in the years 1980and 1990-1991 with the 60-cm double-refractor of the Bosscha Observatoryat Lembang, Java.

A second list of wide visual binaries
Not Available

A second list of wide visual binaries
Not Available

Photographic observations of visual double stars
The results of photographic observations of 199 visual double stars,obtained at the Bosscha Observatory at Lembang, Indonesia, in the years1958-1975 (with one 1953 plate) are presented. The material comprises708 plates with an average of 37 images measured per plate. A shortdescription of the program is given (cf. van Albada-van Dien, 1958).

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Erbogan
Sað Açýklýk:13h55m16.29s
Yükselim:-32°05'57.2"
Görünürdeki Parlaklýk:7.068
Uzaklýk:208.333 parsek
özdevim Sað Açýklýk:-44.7
özdevim Yükselim:-4.9
B-T magnitude:8.298
V-T magnitude:7.17

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 121287
TYCHO-2 2000TYC 7283-1194-1
USNO-A2.0USNO-A2 0525-16754084
HIPHIP 67980

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