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HD 30065


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CCD Speckle Observations of Binary Stars from the Southern Hemisphere. IV. Measures during 2001
We present 549 observations of 181 primarily southern binary stars. Ofthese, 32 are high-quality nondetections, meaning that, if binary, thesystem had a separation below the diffraction limit at the time of theobservation, and relative astrometry is presented for the remaining 517observations. In addition, a magnitude difference measure is reported in312 cases in which the observation was judged to be of sufficientquality to have little decorrelation of the speckle pattern of thesecondary relative to the primary star. These data were obtained fromspeckle observations taken at the Lowell-Tololo 0.6 m telescope at CerroTololo Inter-American Observatory using a fast-readout CCD detectorduring 2001 November. Results from an astrometric measurement precisionstudy indicate that the measures have typical uncertainties of12.2+/-1.4 mas in separation and 1.28d+/-0.21d in position angle withlittle systematic error. The magnitude differences presented show goodagreement with values in the Hipparcos catalog where comparisons can bemade. Their uncertainties are also characterized; they show a typicalvalue of 0.18 mag per 2 minute observation. Four systems of particularinterest are discussed.

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Observation and Astrometry data

Constellation:Peintre
Right ascension:04h41m51.78s
Declination:-47°49'33.8"
Apparent magnitude:7.465
Distance:89.928 parsecs
Proper motion RA:-23.9
Proper motion Dec:-39.2
B-T magnitude:7.792
V-T magnitude:7.492

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 30065
TYCHO-2 2000TYC 8079-389-1
USNO-A2.0USNO-A2 0375-01601070
HIPHIP 21849

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