Table 2:

Orbital and physical parameters derived for the best-fit Keplerian model of Cha H 8.

Parameter	Value
P (days)................	1895 132
T (HJD-2 450 000)	3163 214
e ..........................	0.59 0.22
() .....................	106 26
K (km s-1).............	2.433 0.44
V0 (km s-1) ..........	16.693 0.75
f(m) ( )...	1.488
()...	25 7a, 31 8a
(AU) ......	0.34 0.09
a2 (AU) ...............	1.02 0.06 a, 1.17 0.07a
...............	18
Span (days) ........	3618
(O-C)(m/s) .......	228
..................	1.45

Notes. The given parameters are: orbital period, periastron time, eccentricity, longitude of periastron, RV semi-amplitude, system velocity, mass function, lower limit of the companion mass, lower limit of the semi-major axis of the primary, semi-major axis of the companion, number of measurements, time span of the observations, residuals, reduced . ^(a) Derived parameter based on two available estimates for the primary mass of 0.07  and 0.10 . No further errors of the primary mass, e.g. as introduced by the use of evolutionary models, have been taken into account here.