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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:45:44

Orbital Elements for HDS398
WDS: HDS398 WDS ID/Discoverer
P: 170.000 Orbital period (years)
a: 0.235 Semi-major axis (arcseconds)
i: 109.7 Inclination (degrees)
Ω: 243.1 Longitude of ascending node (degrees)
T: 2003.370 Epoch of periastron passage (year)
e: 0.462 Eccentricity
ω: 39.8 Longitude of periastron (degrees)
Start-Year: 1940.0 Year
End-Year: 2110.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS398
Position: 030839.51-441317.8 Epoch-2000 right ascension and declination
WDS-ID: 03087-4413 WDS designation
Discoverer Code: HDS398 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 19693 HD catalog number
Hipparcos number: 14608 Hipparcos catalog number
V1: 9.44 Magnitude of the primary
V2: 9.70 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2018 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS398
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:45:44 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 = [-0.10543256936296605, -0.10023955014816668, -0.09499509033063899, -0.08970114317385952, -0.08435972351616403, -0.07897291372007184, -0.07354287007135824, -0.06807182967413346, -0.06256211789315051, -0.057016156400139795, -0.05143647188721952, -0.045825705517460444, -0.04018662319054837, -0.03452212649840313, -0.02883526564375119, -0.02312925169176338, -0.017407471692648162, -0.011673504399410598, -0.005931137641546676, -0.0001843873791555548, ...], y_list = [0.1599929588599153, 0.15789985272140794, 0.15572570841598288, 0.1534704307825989, 0.1511339223468308, 0.1487160846124589, 0.14621681950530918, 0.1436360309892054, 0.1409736268765755, 0.13822952085932969, 0.1354036347891535, 0.13249590124041424, 0.12950626639353344, 0.12643469316582318, 0.12328116528038656, 0.1200456908440298, 0.11672830734642287, 0.11332908685594908, 0.10984814198694391, 0.106285632659566, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.10543256936296605, -0.10023955014816668, -0.09499509033063899, -0.08970114317385952, -0.08435972351616403, -0.07897291372007184, -0.07354287007135824, -0.06807182967413346, -0.06256211789315051, -0.057016156400139795, -0.05143647188721952, -0.045825705517460444, -0.04018662319054837, -0.03452212649840313, -0.02883526564375119, -0.02312925169176338, -0.017407471692648162, -0.011673504399410598, -0.005931137641546676, -0.0001843873791555548, ...], y_list=[0.1599929588599153, 0.15789985272140794, 0.15572570841598288, 0.1534704307825989, 0.1511339223468308, 0.1487160846124589, 0.14621681950530918, 0.1436360309892054, 0.1409736268765755, 0.13822952085932969, 0.1354036347891535, 0.13249590124041424, 0.12950626639353344, 0.12643469316582318, 0.12328116528038656, 0.1200456908440298, 0.11672830734642287, 0.11332908685594908, 0.10984814198694391, 0.106285632659566, ...])
    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([-1.01045670e-01, -9.10126612e-02, -8.0638....29026889e-01, -1.20056316e-01, -1.10728601e-01]), y = array([-0.004721 , -0.01028763, -0.0158154 , -0...6, 0.01200473, 0.00644298, 0.00086226]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.01045670e-01, -9.10126612e-02, -8.0638....29026889e-01, -1.20056316e-01, -1.10728601e-01]), array([-0.004721 , -0.01028763, -0.0158154 , -0...6, 0.01200473, 0.00644298, 0.00086226])], 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([-1.01045670e-01, -9.10126612e-02, -8.0638....29026889e-01, -1.20056316e-01, -1.10728601e-01]), array([-0.004721 , -0.01028763, -0.0158154 , -0...6, 0.01200473, 0.00644298, 0.00086226])], 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([[-1.01045670e-01, -9.10126612e-02, -8.063...20047259e-02, 6.44298322e-03, -4.72099855e-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. , 0.01149834, 0.02327825, 0.035...7169, 0.96732923, 0.9779066 , 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=177, 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([[-1.01045670e-01, -9.10126612e-02, -8.063...20047259e-02, 6.44298322e-03, -4.72099855e-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. , 0.01149834, 0.02327825, 0.035...7169, 0.96732923, 0.9779066 , 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 177, 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>