Basic data (System:661)

C1900.0 :11058-6026
C2000.0 :111004080-60584495
Comp. :
Magn. : 8.25
Spect. :WC7 ; O7V


Identifiers:

CD -60 3396CPD -60 2578HD 97152HIP 54574


Orbit

ElementValueStd. dev.
Period (d.):7.886
Epoch (xJD-2,400,000.0):42463.42 (see note)
Eccentricity:0.0
omega primary (deg.):0.0
K1 (km/s):144.
K2 (km/s):84.6
V0 (km/s):-10.
sigma residuals primary:
sigma residuals secondary:
#RV primary:
#RV secondary:
Grade:2.0
Contributor:DAO
Status:PUB
Bibcode:1981ApJ...244..528D
Derived quantities (on the fly, from the above quantities)
a1sini (km):1.56154e+070
a2sini (km):9.17405e+060
m1sin**3 i (sol.mass):3.626120
m2sin**3 i (sol.mass):6.172120

Note

The magnitude is a narrow-band photoelectric magnitude from L.F. Smith (Mon.
Not. Roy. Astron. Soc., 138, 109, 1968). The orbit is assumed circular for the
absorption-spectrum component, but a small (and presumably spurious)
eccentricity fits the emission-line velocities better. The epoch is the time of
inferior conjunction for the W-R star, but there are small phase displacements
from one line to the next. The upper row gives elements derived from the C III
and C IV emission lines, the lower those derived from hydrogen and helium
absorption lines. The emission lines in the W-R spectrum give very different
values for V0. If the O-type component has a mass normal for its spectral type,
the orbital inclination is about 36 deg.

Plot

Orbit
Encapsulated PostScript file

D.Pourbaix

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