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HD 8341


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Discovery of the Widest Very Low Mass Binary
We report the discovery of a very low mass binary system (primary mass<0.1 Msolar) with a projected separation of ~5100 AU, morethan twice that of the widest previously known system. A spectrumcovering the 1-2.5 μm wavelength interval at R~1700 is presented foreach component. Analysis of the spectra indicates spectral types of M6.5V and M8 V, and the photometric distance of the system is ~62 pc. Giventhat previous studies have established that no more than 1% of very lowmass binary systems have orbits larger than 20 AU, the existence of sucha wide system has a bearing on very low mass star formation andevolution models.

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Observation and Astrometry data

Constellation:Phoenix
Right ascension:01h21m44.33s
Declination:-52°04'35.4"
Apparent magnitude:8.601
Distance:271.003 parsecs
Proper motion RA:19.2
Proper motion Dec:7.1
B-T magnitude:8.755
V-T magnitude:8.614

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 8341
TYCHO-2 2000TYC 8039-85-1
USNO-A2.0USNO-A2 0375-00419334
HIPHIP 6364

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