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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:08:39

Orbital Elements for DUN116AB
WDS: DUN116AB WDS ID/Discoverer
P: 24000.000 Orbital period (years)
a: 30.0 Semi-major axis (arcseconds)
i: 110.0 Inclination (degrees)
Ω: 82.0 Longitude of ascending node (degrees)
T: 3600.000 Epoch of periastron passage (year)
e: 0.69 Eccentricity
ω: 100.0 Longitude of periastron (degrees)
Start-Year: -9975.0 Year
End-Year: 14025.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for DUN116AB
Position: 115642.30-321605.3 Epoch-2000 right ascension and declination
WDS-ID: 11567-3216 WDS designation
Discoverer Code: DUN116AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 103742 HD catalog number
Hipparcos number: 58240 Hipparcos catalog number
V1: 7.67 Magnitude of the primary
V2: 7.83 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2016 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for DUN116AB
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ValueError
Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:08:40 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 = [-5.806375677090143, -5.8098197969830325, -5.813263831290464, -5.816707779965743, -5.8201516429621485, -5.823595420233017, -5.827039111731653, -5.830482717411378, -5.833926237225485, -5.8373696711272824, -5.840813019070133, -5.844256281007329, -5.847699456892225, -5.851142546678138, -5.854585550318406, -5.858028467766381, -5.861471298975338, -5.8649140438987475, -5.868356702489826, -5.871799274702028, ...], y_list = [-16.43995946600317, -16.43966528202034, -16.439370855861974, -16.43907618754381, -16.438781277081592, -16.438486124491064, -16.438190729787948, -16.437895092987972, -16.437599214106868, -16.437303093160345, -16.437006730164125, -16.43671012513391, -16.4364132780854, -16.436116189034298, -16.4358188579963, -16.435521284987082, -16.435223470022347, -16.434925413117757, -16.434627114288997, -16.43432857355172, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-5.806375677090143, -5.8098197969830325, -5.813263831290464, -5.816707779965743, -5.8201516429621485, -5.823595420233017, -5.827039111731653, -5.830482717411378, -5.833926237225485, -5.8373696711272824, -5.840813019070133, -5.844256281007329, -5.847699456892225, -5.851142546678138, -5.854585550318406, -5.858028467766381, -5.861471298975338, -5.8649140438987475, -5.868356702489826, -5.871799274702028, ...], y_list=[-16.43995946600317, -16.43966528202034, -16.439370855861974, -16.43907618754381, -16.438781277081592, -16.438486124491064, -16.438190729787948, -16.437895092987972, -16.437599214106868, -16.437303093160345, -16.437006730164125, -16.43671012513391, -16.4364132780854, -16.436116189034298, -16.4358188579963, -16.435521284987082, -16.435223470022347, -16.434925413117757, -16.434627114288997, -16.43432857355172, ...])
    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([-23.27011337, -23.27374437, -23.27737258,...-23.25920368, -23.26284303, -23.2664796 ]), y = array([-0.00094165, -0.00344842, -0.00595519, ..., 0.00657865, 0.00407188, 0.00156511]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-23.27011337, -23.27374437, -23.27737258,...-23.25920368, -23.26284303, -23.2664796 ]), array([-0.00094165, -0.00344842, -0.00595519, ..., 0.00657865, 0.00407188, 0.00156511])], 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([-23.27011337, -23.27374437, -23.27737258,...-23.25920368, -23.26284303, -23.2664796 ]), array([-0.00094165, -0.00344842, -0.00595519, ..., 0.00657865, 0.00407188, 0.00156511])], 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([[-2.32701134e+01, -2.32737444e+01, -2.327...57864813e-03, 4.07188170e-03, -9.41652338e-04]]), w=array([1., 1., 1., ..., 1., 1., 1.]), u=array([0.00000000e+00, 4.22123239e-05, 8.4402738... 9.99873231e-01, 9.99915510e-01, 1.00000000e+00]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=24007, 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([[-2.32701134e+01, -2.32737444e+01, -2.327...57864813e-03, 4.07188170e-03, -9.41652338e-04]]), w = array([1., 1., 1., ..., 1., 1., 1.]), u = array([0.00000000e+00, 4.22123239e-05, 8.4402738... 9.99873231e-01, 9.99915510e-01, 1.00000000e+00]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 24007, 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>