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HD 81161


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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.

A preliminary compilation of DS-programme star positions
A catalog is presented of the double-star-program (DS-program) starpositions, listing right ascensions for 930 DSs and declinations for1225 DSs of the program. The positions were compiled from the observedvalues obtained between 1980 and 1987 with the meridian circles of sixUSSR observatories (the Moscow, Kazan', Kiev, Khar'kov, Odessa, andTashkent Observatories) and the Belgrade Observatory. The measurementsand the treatment of the observational material were performed using therelative method, and the FK-4 system stars were used as reference stars.

Mikrometermessungen von Doppelsternen. VII
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970A&AS....1..393H&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Buyuk Ayi
Sað Açýklýk:09h26m57.20s
Yükselim:+64°20'35.7"
Görünürdeki Parlaklýk:8.818
Uzaklýk:177.936 parsek
özdevim Sað Açýklýk:-9.3
özdevim Yükselim:11.4
B-T magnitude:9.04
V-T magnitude:8.837

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 81161
TYCHO-2 2000TYC 4138-1154-1
USNO-A2.0USNO-A2 1500-05184701
HIPHIP 46347

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