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HD 231247


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관련 글

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.

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관측 및 측정 데이터

별자리:화살자리
적경:19h22m12.87s
적위:+16°39'45.0"
가시등급:8.883
거리:540.541 파섹
적경상의 고유운동:-2
적위상의 고유운동:0.5
B-T magnitude:9.252
V-T magnitude:8.914

천체목록:
일반명   (Edit)
HD 1989HD 231247
TYCHO-2 2000TYC 1600-55-1
USNO-A2.0USNO-A2 1050-13709742
HIPHIP 95214

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