Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:22:48

Orbital Elements for RST3869AB
WDS: RST3869AB WDS ID/Discoverer
P: 300.000 Orbital period (years)
a: 2.018 Semi-major axis (arcseconds)
i: 55.7 Inclination (degrees)
Ω: 276.5 Longitude of ascending node (degrees)
T: 1982.590 Epoch of periastron passage (year)
e: 0.3 Eccentricity
ω: 80.3 Longitude of periastron (degrees)
Start-Year: 1875.0 Year
End-Year: 2175.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST3869AB
Position: 141421.39-152121.8 Epoch-2000 right ascension and declination
WDS-ID: 14144-1521 WDS designation
Discoverer Code: RST3869AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 124498 HD catalog number
Hipparcos number: 69562 Hipparcos catalog number
V1: 10.39 Magnitude of the primary
V2: 13.4 Magnitude of the secondary
Equinox: Equinox
Date: 2021 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for RST3869AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:22:48 2025

A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.

 /var/www/cgi-bin/ds_orbit.py in <module>
    891 
    892 # Smooth curve if necessary
=>  893 x_smooth, y_smooth = Q_get_smoothed_orbit(x_list, y_list)
    894 plt.plot(x_smooth, y_smooth, label=f'Orbit of {wds}', color='#528B8B')
    895 
x_smooth undefined, y_smooth undefined, Q_get_smoothed_orbit = <function Q_get_smoothed_orbit>, x_list = [0.9967532057573781, 1.0238399045651334, 1.0506834349400127, 1.0772753432194662, 1.1036070585508642, 1.1296698893120913, 1.155455019478417, 1.1809535049364184, 1.2061562697459114, 1.231054102351316, 1.255637651744083, 1.2798974235783176, 1.3038237762420783, 1.3274069168874008, 1.3506368974225427, 1.3735036104705824, 1.3959967852991302, 1.4181059837266343, 1.4398205960115302, 1.4611298367313486, ...], y_list = [-1.2086802314216536, -1.1955288882903696, -1.1820936140282274, -1.16837526163299, -1.1543747277850156, -1.14009295512221, -1.12553093462709, -1.1106897081313019, -1.095570370943263, -1.0801740746047972, -1.0645020297829841, -1.04855550930371, -1.032335851333737, -1.0158444627183905, -0.9990828224823493, -0.9820524855013173, -0.9647550863527371, -0.9471923433540456, -0.9293660627973522, -0.9112781433898087, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.9967532057573781, 1.0238399045651334, 1.0506834349400127, 1.0772753432194662, 1.1036070585508642, 1.1296698893120913, 1.155455019478417, 1.1809535049364184, 1.2061562697459114, 1.231054102351316, 1.255637651744083, 1.2798974235783176, 1.3038237762420783, 1.3274069168874008, 1.3506368974225427, 1.3735036104705824, 1.3959967852991302, 1.4181059837266343, 1.4398205960115302, 1.4611298367313486, ...], y_list=[-1.2086802314216536, -1.1955288882903696, -1.1820936140282274, -1.16837526163299, -1.1543747277850156, -1.14009295512221, -1.12553093462709, -1.1106897081313019, -1.095570370943263, -1.0801740746047972, -1.0645020297829841, -1.04855550930371, -1.032335851333737, -1.0158444627183905, -0.9990828224823493, -0.9820524855013173, -0.9647550863527371, -0.9471923433540456, -0.9293660627973522, -0.9112781433898087, ...])
    272     # Nur wenn ausreichend Punkte vorhanden sind
    273     if len(x) >= 4:
=>  274         tck, u = splprep([x, y], s=0.0, per=True) # per=True für geschlossene Kurve (Orbit)
    275         u_fine = np.linspace(0, 1, 300)           # Feinere Parameterwerte
    276         return splev(u_fine, tck)
tck undefined, u undefined, splprep = <function splprep>, x = array([-1.81143092, -1.82909361, -1.84570588, -1...3, -1.75201583, -1.77290403, -1.79270514]), y = array([-0.02202627, -0.04754986, -0.07304619, -0...8, 0.05456092, 0.02904449, 0.00351019]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.81143092, -1.82909361, -1.84570588, -1...3, -1.75201583, -1.77290403, -1.79270514]), array([-0.02202627, -0.04754986, -0.07304619, -0...8, 0.05456092, 0.02904449, 0.00351019])], w=None, u=None, ub=None, ue=None, k=3, task=0, s=0.0, t=None, full_output=0, nest=None, per=True, quiet=1)
    153     """
    154 
=>  155     res = _impl.splprep(x, w, u, ub, ue, k, task, s, t, full_output, nest, per,
=>  156                         quiet)
    157     return res
res undefined, global _impl = <module 'scipy.interpolate._fitpack_impl' from '...ist-packages/scipy/interpolate/_fitpack_impl.py'>, _impl.splprep = <function splprep>, x = [array([-1.81143092, -1.82909361, -1.84570588, -1...3, -1.75201583, -1.77290403, -1.79270514]), array([-0.02202627, -0.04754986, -0.07304619, -0...8, 0.05456092, 0.02904449, 0.00351019])], w = None, u = None, ub = None, ue = None, k = 3, task = 0, s = 0.0, t = None, full_output = 0, nest = None, per = True, quiet = 1
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_impl.py in splprep(x=array([[-1.81143092, -1.82909361, -1.84570588, -... 0.05456092, 0.02904449, -0.02202627]]), w=array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1... 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u=array([0. , 0.00317198, 0.00628178, 0.009...5308, 0.99009251, 0.99346241, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=307, per=True, quiet=1)
    172     wrk = _parcur_cache['wrk']
    173     iwrk = _parcur_cache['iwrk']
=>  174     t, c, o = _fitpack._parcur(ravel(transpose(x)), w, u, ub, ue, k,
=>  175                                task, ipar, s, t, nest, wrk, iwrk, per)
    176     _parcur_cache['u'] = o['u']
t = array([], dtype=float64), c undefined, o undefined, global _fitpack = <module 'scipy.interpolate._fitpack' from '/usr/...polate/_fitpack.cpython-312-x86_64-linux-gnu.so'>, _fitpack._parcur = <built-in function _parcur>, global ravel = <function ravel>, global transpose = <function transpose>, x = array([[-1.81143092, -1.82909361, -1.84570588, -... 0.05456092, 0.02904449, -0.02202627]]), w = array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1... 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u = array([0. , 0.00317198, 0.00628178, 0.009...5308, 0.99009251, 0.99346241, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 307, wrk = array([], dtype=float64), iwrk = array([], dtype=int32), per = True

ValueError: Invalid inputs.
      add_note = <built-in method add_note of ValueError object>
      args = ('Invalid inputs.',)
      with_traceback = <built-in method with_traceback of ValueError object>