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Speckle Interferometry at the US Naval Observatory. XIII.
The results of 1424 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 2000 short-exposure images.These observations are averaged into 1053 mean relative positions andrange in separation from 0.36″ to 61.92″, with a medianseparation of 10.31″. This is the 13th in a series of paperspresenting measurements obtained with this system and covers the period2006 January 12-December 29. Included in these data are nine oldermeasurements whose positions were previously deemed possibly aberrantbut are no longer classified this way following a confirmingobservation. This paper also includes the first data obtained using anew "secondary" camera, designed and built at USNO.

A second list of wide visual binaries
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A second list of wide visual binaries
Not Available

The proper motions of Struve double stars
The proper motions of the components of 103 Struve double stars fromMuller's list of neglected stars and of 15 other systems were measuredrelative to sets of reference stars, for the primary purpose ofdistinguishing physical from optical pairs. A by-product of thisinvestigation is a list of measured position angles and distances ofthese objects, at two epochs each.

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Dades d'Observació i Astrometria

Constel·lació:Lyra
Ascensió Recta:19h05m05.80s
Declinació:+40°07'33.1"
Magnitud Aparent:8.531
Distancia:170.648 parsecs
Moviment propi RA:3.7
Moviment propi Dec:-12.2
B-T magnitude:8.722
V-T magnitude:8.547

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 177982
TYCHO-2 2000TYC 3124-2602-1
USNO-A2.0USNO-A2 1275-10738502
HIPHIP 93730

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