Basic data (System:648)

C1900.0 :10576+6217
C2000.0 :110343669+61450372
Comp. :
Magn. : 1.79(V)
Spect. :K0III ; F


Bayer $\alpha$ UMaBD +62 1161HD 95689HIP 54061


ElementValueStd. dev.
Period (d.):16070.7
Periastron time (xJD-2,400,000.0):18636.2
Reference T0/epoch:JD
omega primary (deg.):174.
K1 (km/s):2.0
K2 (km/s):
V0 (km/s):-8.7
sigma residuals primary:
sigma residuals secondary:
#RV primary:
#RV secondary:
Derived quantities (on the fly, from the above quantities)
a1sini (km):4.14021e+080
f(m) (sol.mass):0.01099150


This system is A.D.S. 8035 with Delta m close to 3m. Underhill adopted the
orbital elements by H.S. Jones and H.H. Furner (Mon. Not. Roy. Astron. Soc.,
98, 92, 1937) with P=44.0y, T=1865.9. She also assumed their values of e and
omega and derived K and V0 only. The orbital inclination is 161. deg. The
visual orbit by W.D. Heintz (Munchen Veroff., 5, 247, 1963) is now considered
superior to that by Jones and Furner although the predictions of the two orbits
about radial velocities during the interval of observation are similar. C.D.
Scarfe (Astrophys. Space Sci., 11, 112, 1971) has shown that the observed
velocities do not agree well with either of these orbits, or even with that
derived by P. Couteau (J. Observateurs, 42, 31, 1959). Visual observers are
hampered by the very close approach of the two stars at periastron. This is
just the time when the radial velocities will be able to give most information,
but the next approach, according to Heintz' values of the elements will be
about the year 2000. All elements should be considered uncertain until then.


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