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HD 77213


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Speckle Interferometry at the US Naval Observatory. IV.
The results of 1314 speckle interferometric observations of 625 binarystars, ranging in separation from 0.2" to 5.2" with a limiting secondarymagnitude of V=11, are tabulated. These observations were obtained usingthe 66 cm refractor at the US Naval Observatory in Washington, DC, withan intensified CCD detector. This is the fourth in a series of paperspresenting measures obtained with this equipment and covers the period1997 January 1 through December 31. Random errors for all measures areestimated to be 18 mas in separation and 0.57d/rho in position angle,where rho is the separation in arcseconds.

GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies.
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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Su Yilani
Sað Açýklýk:09h01m12.75s
Yükselim:+02°44'42.6"
Görünürdeki Parlaklýk:9.393
özdevim Sað Açýklýk:0
özdevim Yükselim:0
B-T magnitude:10.268
V-T magnitude:9.466

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 77213
TYCHO-2 2000TYC 229-444-2
USNO-A2.0USNO-A2 0900-06250211
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