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HD 12912


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Speckle Interferometry of Southern Double Stars. II. Measures from the CASLEO 2.15 Meter Telescope, 1995-1996
Relative astrometry is presented for 198 observations of 160 doublestars. The data were obtained at the 2.15 m telescope at the ComplejoAstronómico El Leoncito (Argentina) with a multianodemicrochannel array (MAMA) detector system. Five high-qualitynondetections are also reported. When judged against ephemeris positionsfor binaries with very well determined orbits, the separation residualsexhibit a root mean square deviation of13.2+3.4-1.9 mas and the position angle residualsexhibit rms deviation of 2.9d+0.8d-0.5d. Factorsaffecting the measurement precision are discussed.

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观测天体数据

星座:鯨魚座
右阿森松:02h05m59.35s
赤纬:-22°09'02.5"
视星:8.226
距离:132.45 天文距离
右阿森松适当运动:6
赤纬适当运动:58.3
B-T magnitude:8.776
V-T magnitude:8.272

目录:
适当名称   (Edit)
HD 1989HD 12912
TYCHO-2 2000TYC 5858-110-1
USNO-A2.0USNO-A2 0675-00738240
HIPHIP 9798

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