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HD 43148


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The Calar Alto lunar occultation program: update and new results
We present an update of the lunar occultation program which is routinelycarried out in the near-IR at the Calar Alto Observatory. A total of 350events were recorded since our last report (Fors et al. 2004, A&A,419, 285). In the course of eight runs we have observed, among others,late-type giants, T-Tauri stars, and infrared sources. Noteworthy was apassage of the Moon close to the galactic center, which produced a largenumber of events during just a few hours in July 2004. Results includethe determinations of the angular diameter of RZ Ari,and the projected separations and brightness ratios for one triple and13 binary stars, almost all of which representing first time detections.Projected separations range from 0farcs09 to 0farcs007. We provide aquantitative analysis of the performance achieved in our observations interms of angular resolution and sensitivity, which reach about 0farcs003and K ≈8.5 mag, respectively. We also present a statisticaldiscussion of our sample, and in particular of the frequency ofdetection of binaries among field stars.

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Observation and Astrometry data

Constellation:Gemini
Right ascension:06h15m54.79s
Declination:+27°51'42.4"
Apparent magnitude:7.996
Distance:255.102 parsecs
Proper motion RA:12.1
Proper motion Dec:-22.7
B-T magnitude:9.977
V-T magnitude:8.16

Catalogs and designations:
Proper Names
HD 1989HD 43148
TYCHO-2 2000TYC 1885-957-1
USNO-A2.0USNO-A2 1125-03664744
HIPHIP 29749

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