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2002PASP..114..224H - Publ. Astron. Soc. Pac., 114, 224-228 (2002/February-0)

A precise orbit determination of χ1 Orionis from astrometric and radial velocity data.


Abstract (from CDS):

We have derived an accurate orbit of χ1 Orionis (HD 39587, HIP 27913, HR 2047) by combining precise astrometric and radial velocity data. The combined orbital analysis yields P=5156.7±2.5 days, K1=1.885±0.004 km.s–1, α1=94.8±1.6 mas, e=0.451±0.003, and mass ratio (M2/M1) q=0.15±0.005. The mass ratio derived here is among the smallest well-determined ratio for a G-type dwarf primary star. We have also obtained a parallax of χ1 Orionis, 115.93±1.02 mas, in excellent agreement with the Hipparcos value.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Binaries: Visual - Stars: Individual: Constellation Name: χ1 Orionis - stars: individual (HD 39587)

Nomenclature: Table 1: Gat NNN (No. 1261) added.

Simbad objects: 11

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