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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:59:24

Orbital Elements for STF2398AB
WDS: STF2398AB WDS ID/Discoverer
P: 408.000 Orbital period (years)
a: 13.88 Semi-major axis (arcseconds)
i: 66.0 Inclination (degrees)
Ω: 136.9 Longitude of ascending node (degrees)
T: 1775.000 Epoch of periastron passage (year)
e: 0.53 Eccentricity
ω: 234.6 Longitude of periastron (degrees)
Start-Year: 1821.0 Year
End-Year: 2229.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2398AB
Position: 184246.69+593749.4 Epoch-2000 right ascension and declination
WDS-ID: 18428+5938 WDS designation
Discoverer Code: STF2398AB Discover designation and components
ADS number: 11632 Aitken Double Star catalog
HD number: 173739 HD catalog number
Hipparcos number: 91768 Hipparcos catalog number
V1: 9.11 Magnitude of the primary
V2: 9.96 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1987 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF2398AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:59:24 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 = [-8.369933809409847, -8.464666022751343, -8.555741056449243, -8.643243295336816, -8.72725511344136, -8.807856860543785, -8.885126860295738, -8.959141418060646, -9.02997483688518, -9.097699440218836, -9.162385600184967, -9.224101770369424, -9.282914522235535, -9.3388885843987, -9.392086884102854, -9.442570590335679, -9.490399158102285, -9.535630373448779, -9.578320398889556, -9.618523818946347, ...], y_list = [-6.304622340762846, -6.498230127887018, -6.689030637618364, -6.877038153954118, -7.062268765022671, -7.244740128365657, -7.424471260036077, -7.601482345239885, -7.775794568449549, -7.947429961105111, -8.116411265190909, -8.2827618111354, -8.446505408627665, -8.60766624907745, -8.766268818567589, -8.922337820258722, -9.075898105306607, -9.226974611444037, -9.375592308462148, -9.52177614990065, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-8.369933809409847, -8.464666022751343, -8.555741056449243, -8.643243295336816, -8.72725511344136, -8.807856860543785, -8.885126860295738, -8.959141418060646, -9.02997483688518, -9.097699440218836, -9.162385600184967, -9.224101770369424, -9.282914522235535, -9.3388885843987, -9.392086884102854, -9.442570590335679, -9.490399158102285, -9.535630373448779, -9.578320398889556, -9.618523818946347, ...], y_list=[-6.304622340762846, -6.498230127887018, -6.689030637618364, -6.877038153954118, -7.062268765022671, -7.244740128365657, -7.424471260036077, -7.601482345239885, -7.775794568449549, -7.947429961105111, -8.116411265190909, -8.2827618111354, -8.446505408627665, -8.60766624907745, -8.766268818567589, -8.922337820258722, -9.075898105306607, -9.226974611444037, -9.375592308462148, -9.52177614990065, ...])
    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([-4.09399913, -4.32099368, -4.54235231, -4...13124933, -3.37991955, -3.62336157, -3.86142664]), y = array([-8.83822160e-02, -3.43180332e-01, -5.9753...16e-01, 4.21210396e-01, 1.66533877e-01]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-4.09399913, -4.32099368, -4.54235231, -4...13124933, -3.37991955, -3.62336157, -3.86142664]), array([-8.83822160e-02, -3.43180332e-01, -5.9753...16e-01, 4.21210396e-01, 1.66533877e-01])], 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([-4.09399913, -4.32099368, -4.54235231, -4...13124933, -3.37991955, -3.62336157, -3.86142664]), array([-8.83822160e-02, -3.43180332e-01, -5.9753...16e-01, 4.21210396e-01, 1.66533877e-01])], 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([[-4.09399913e+00, -4.32099368e+00, -4.542...e-01, 4.21210396e-01, -8.83822160e-02]]), 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. , 0.00584271, 0.01161592, 0.017... 0.97602479, 0.98209868, 0.98812311, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=415, 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([[-4.09399913e+00, -4.32099368e+00, -4.542...e-01, 4.21210396e-01, -8.83822160e-02]]), 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. , 0.00584271, 0.01161592, 0.017... 0.97602479, 0.98209868, 0.98812311, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 415, 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>