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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:22:27

Orbital Elements for STF1821A
WDS: STF1821A WDS ID/Discoverer
P: 20.000 Orbital period (years)
a: 0.0351 Semi-major axis (arcseconds)
i: 56.0 Inclination (degrees)
Ω: 186.0 Longitude of ascending node (degrees)
T: 1994.900 Epoch of periastron passage (year)
e: 0.5 Eccentricity
ω: 15.0 Longitude of periastron (degrees)
Start-Year: 2015.0 Year
End-Year: 2035.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1821A
Position: 141329.00+514723.8 Epoch-2000 right ascension and declination
WDS-ID: 14135+5147 WDS designation
Discoverer Code: STF1821A Discover designation and components
ADS number: 9173 Aitken Double Star catalog
HD number: 124675 HD catalog number
Hipparcos number: 69483 Hipparcos catalog number
V1: 4.53 Magnitude of the primary
V2: . Magnitude of the secondary
Equinox: Equinox
Date: 2012 Date of last observation
Orbit grade: 9 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for STF1821A
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:22:27 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 = [0.005254145117054549, 0.011907700890478344, 0.013415916033092936, 0.011984779797381044, 0.00911512868286585, 0.005547724630643234, 0.0016731546008485112, -0.002277589872409485, -0.006150592638186155, -0.009829986417487857, -0.01321704549486759, -0.016216968709879855, -0.01872841582231889, -0.020632750110995312, -0.021780124740416233, -0.02196841182418533, -0.020908220135028577, -0.018163721983576832, -0.013074089642970632, -0.004891715366907133, ...], y_list = [-0.01592956299891321, -0.004136565374352022, 0.01027642408633381, 0.022794791393584632, 0.0327398012341975, 0.04027754979321933, 0.04567019177777344, 0.04914298657896703, 0.05087015124943002, 0.05098195731929957, 0.04957380426598356, 0.04671390849826204, 0.04244978340560672, 0.036814820077306014, 0.02983761483760024, 0.021560177524769207, 0.012081704181290452, 0.0016797338377035123, -0.00881171979892788, -0.01677946355725548, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.005254145117054549, 0.011907700890478344, 0.013415916033092936, 0.011984779797381044, 0.00911512868286585, 0.005547724630643234, 0.0016731546008485112, -0.002277589872409485, -0.006150592638186155, -0.009829986417487857, -0.01321704549486759, -0.016216968709879855, -0.01872841582231889, -0.020632750110995312, -0.021780124740416233, -0.02196841182418533, -0.020908220135028577, -0.018163721983576832, -0.013074089642970632, -0.004891715366907133, ...], y_list=[-0.01592956299891321, -0.004136565374352022, 0.01027642408633381, 0.022794791393584632, 0.0327398012341975, 0.04027754979321933, 0.04567019177777344, 0.04914298657896703, 0.05087015124943002, 0.05098195731929957, 0.04957380426598356, 0.04671390849826204, 0.04244978340560672, 0.036814820077306014, 0.02983761483760024, 0.021560177524769207, 0.012081704181290452, 0.0016797338377035123, -0.00881171979892788, -0.01677946355725548, ...])
    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([-0.01307409, -0.00489172, 0.00525415, 0...2, -0.02196841, -0.02090822, -0.01816372]), y = array([-0.00881172, -0.01677946, -0.01592956, -0...1, 0.02156018, 0.0120817 , 0.00167973]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.01307409, -0.00489172, 0.00525415, 0...2, -0.02196841, -0.02090822, -0.01816372]), array([-0.00881172, -0.01677946, -0.01592956, -0...1, 0.02156018, 0.0120817 , 0.00167973])], 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([-0.01307409, -0.00489172, 0.00525415, 0...2, -0.02196841, -0.02090822, -0.01816372]), array([-0.00881172, -0.01677946, -0.01592956, -0...1, 0.02156018, 0.0120817 , 0.00167973])], 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([[-0.01307409, -0.00489172, 0.00525415, ... 0.02156018, 0.0120817 , -0.00881172]]), 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. , 0.06852873, 0.12962026, 0.129...014 , 0.80888143, 0.86610987, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=27, 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([[-0.01307409, -0.00489172, 0.00525415, ... 0.02156018, 0.0120817 , -0.00881172]]), 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. , 0.06852873, 0.12962026, 0.129...014 , 0.80888143, 0.86610987, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 27, 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>