## Basic data (System:307)

C1900.0 C2000.0 : 05097-0819 : 051432272-08120591 : B : 6.67 : B9

## Identifiers:

 Bayer $\beta$ Ori BD -08 1063 HIP 24436

## Orbit

Element Value Std. dev. : 9.860 : 29633.196 : JD : 0.1 : 10. : 25.0 : 32.6 : +19.1 : : : : : 2.0 : DAO : PUB : 1942ApJ....95..421S : 3.37263e+06 0 : 4.39791e+06 0 : 0.109258 0 : 0.0837871 0

## Note

Fainter component (BC) of beta Ori (A.D.S. 3823, at least a quadruple system).
Separation from beta Ori A is 9.5" and the pair seems to be a
common-proper-motion pair. This fainter component has been suspected of visual
duplicity (separation always less than 0.2"), but since its two subcomponents
are apparently equal in magnitude, it is difficult to reconcile these
observations with the failure to observe any spectrum of C. Star C cannot be
identified with the star producing the secondary spectrum of the spectroscopic
pair. The bright component, beta Ori A, has been suspected of being a binary
and an orbit was derived by J.S. Plaskett (Astrophys. J., 30, 26, 1909). In
view of the small amplitude (3.8 km/s), however, and the known tendency of
supergiants to display random atmospheric motions, it seems unlikely that this
star is a real binary (see R.F. Sanford, Astrophys. J., 105, 222, 1947).


## Plot

Encapsulated PostScript file

D.Pourbaix