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HD 174508


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Speckle Interferometry at the US Naval Observatory. VIII.
The results of 2044 speckle interferometric observations of doublestars, made with the 26 inch (66 cm) refractor of the US NavalObservatory, are presented. Each speckle interferometric observation ofa system represents a combination of over a thousand short-exposureimages. These observations are averaged into 1399 mean positions andrange in separation from 0.16" to 14.97", with a mean separation of2.51". This is the eighth in a series of papers presenting measuresobtained with this system and covers the period 2001 March 18 through2001 December 30.

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观测天体数据

星座:天鷹座
右阿森松:18h50m25.26s
赤纬:+08°50'14.2"
视星:9.281
右阿森松适当运动:17
赤纬适当运动:6.6
B-T magnitude:9.727
V-T magnitude:9.318

目录:
适当名称   (Edit)
HD 1989HD 174508
TYCHO-2 2000TYC 1026-1378-1
USNO-A2.0USNO-A2 0975-13299173

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