HD 217923

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.
GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies. Not Available
Vitesse radiales dans 5 Selected Areas. Not Available

INHABITED SKY