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HD 153022


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Preliminary Orbit of the Young Binary Haro 1-14c
Using the Keck Interferometer, we spatially resolved the orbit of thepre-main-sequence (PMS) binary, Haro 1-14c, for the first time. Wepresent these interferometric observations along with additionalspectroscopic radial velocity measurements of the components. Weperformed a simultaneous orbit fit to the interferometric visibilitiesand the radial velocities of Haro 1-14c. Based on a statistical analysisof the possible orbital solutions that fit the data, we determinedcomponent masses of M 1 = 0.96+0.27 0.08 M sun and M 2 = 0.33+0.09 0.02 M sun for the primary and secondary,respectively, and a distance to the system of 111+19 18 pc. The distance measurement is consistent with the closedistance estimates of the Ophiuchus molecular cloud. Comparing ourresults with evolutionary tracks suggests an age of 3-4 Myr for Haro1-14c. With additional interferometric measurements to improve theuncertainties in the masses and distance, we expect the low-masssecondary to provide important empirical data for calibrating thetheoretical evolutionary tracks for PMS stars.

UBV photometry of HD stars in the fields of selected cataclysmic variables.
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Observation and Astrometry data

Constellation:Ophiuchus
Right ascension:16h57m27.16s
Declination:-12°14'04.3"
Apparent magnitude:8.776
Distance:217.391 parsecs
Proper motion RA:-17.7
Proper motion Dec:26.9
B-T magnitude:10.154
V-T magnitude:8.89

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 153022
TYCHO-2 2000TYC 5650-623-1
USNO-A2.0USNO-A2 0750-10199957
HIPHIP 82981

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