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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:13:54

Orbital Elements for HDS2931
WDS: HDS2931 WDS ID/Discoverer
P: 140.000 Orbital period (years)
a: 0.213 Semi-major axis (arcseconds)
i: 38.0 Inclination (degrees)
Ω: 54.7 Longitude of ascending node (degrees)
T: 2010.730 Epoch of periastron passage (year)
e: 0.645 Eccentricity
ω: 309.3 Longitude of periastron (degrees)
Start-Year: 1955.0 Year
End-Year: 2095.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2931
Position: 202958.35-773925.6 Epoch-2000 right ascension and declination
WDS-ID: 20300-7739 WDS designation
Discoverer Code: HDS2931 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 193698 HD catalog number
Hipparcos number: 101129 Hipparcos catalog number
V1: 9.57 Magnitude of the primary
V2: 10.33 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2019 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS2931
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:13:54 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 = [0.11236435204727761, 0.11584834307878344, 0.1192741184920917, 0.1226390754896454, 0.12594051270318232, 0.12917562159724438, 0.13234147717622996, 0.13543502791061793, 0.13845308486749472, 0.14139230952476955, 0.14424920105732159, 0.14702008186811327, 0.1497010819463781, 0.15228812159997787, 0.15477689239535236, 0.15716283606517406, 0.15944112110665298, 0.16160661674955493, 0.16365386392102457, 0.16557704277254498, ...], y_list = [-0.2910613010942394, -0.28917472613323647, -0.2871428487968704, -0.28496456921803187, -0.28263870880820935, -0.2801640075391246, -0.27753912100744926, -0.2747626172716922, -0.2718329733689921, -0.26874857190506407, -0.26550769682696806, -0.2621085294050046, -0.25854914371237553, -0.25482750184755404, -0.25094144885235453, -0.24688870732053786, -0.242666871695962, -0.23827340226521285, -0.23370561885791746, -0.22896069427933619, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.11236435204727761, 0.11584834307878344, 0.1192741184920917, 0.1226390754896454, 0.12594051270318232, 0.12917562159724438, 0.13234147717622996, 0.13543502791061793, 0.13845308486749472, 0.14139230952476955, 0.14424920105732159, 0.14702008186811327, 0.1497010819463781, 0.15228812159997787, 0.15477689239535236, 0.15716283606517406, 0.15944112110665298, 0.16160661674955493, 0.16365386392102457, 0.16557704277254498, ...], y_list=[-0.2910613010942394, -0.28917472613323647, -0.2871428487968704, -0.28496456921803187, -0.28263870880820935, -0.2801640075391246, -0.27753912100744926, -0.2747626172716922, -0.2718329733689921, -0.26874857190506407, -0.26550769682696806, -0.2621085294050046, -0.25854914371237553, -0.25482750184755404, -0.25094144885235453, -0.24688870732053786, -0.242666871695962, -0.23827340226521285, -0.23370561885791746, -0.22896069427933619, ...])
    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([-1.18691237e-01, -1.22622909e-01, -1.2567...66e-01, -1.07606621e-01, -1.13739667e-01]), y = array([-0.00420041, -0.01465656, -0.02500928, -0...9, 0.02691271, 0.01670963, 0.00628911]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.18691237e-01, -1.22622909e-01, -1.2567...66e-01, -1.07606621e-01, -1.13739667e-01]), array([-0.00420041, -0.01465656, -0.02500928, -0...9, 0.02691271, 0.01670963, 0.00628911])], 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([-1.18691237e-01, -1.22622909e-01, -1.2567...66e-01, -1.07606621e-01, -1.13739667e-01]), array([-0.00420041, -0.01465656, -0.02500928, -0...9, 0.02691271, 0.01670963, 0.00628911])], 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([[-1.18691237e-01, -1.22622909e-01, -1.256...69127109e-02, 1.67096293e-02, -4.20040938e-03]]), w=array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1..., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u=array([0. , 0.01055085, 0.02074422, 0.030...9029, 0.96568657, 0.97764723, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=147, 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([[-1.18691237e-01, -1.22622909e-01, -1.256...69127109e-02, 1.67096293e-02, -4.20040938e-03]]), w = array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1..., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u = array([0. , 0.01055085, 0.02074422, 0.030...9029, 0.96568657, 0.97764723, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 147, 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>