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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 17:16:27

Orbital Elements for STF787AB
WDS: STF787AB WDS ID/Discoverer
P: 920.000 Orbital period (years)
a: 0.9 Semi-major axis (arcseconds)
i: 136.1 Inclination (degrees)
Ω: 65.7 Longitude of ascending node (degrees)
T: 2091.000 Epoch of periastron passage (year)
e: 0.8 Eccentricity
ω: 146.9 Longitude of periastron (degrees)
Start-Year: 1565.0 Year
End-Year: 2485.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF787AB
Position: 054600.80+211904.5 Epoch-2000 right ascension and declination
WDS-ID: 05460+2119 WDS designation
Discoverer Code: STF787AB Discover designation and components
ADS number: 4349 Aitken Double Star catalog
HD number: 38363 HD catalog number
Hipparcos number: 27205 Hipparcos catalog number
V1: 8.27 Magnitude of the primary
V2: 8.81 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2008 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for STF787AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 17:16:27 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 = [-1.43945544856404, -1.440749076829106, -1.442030700253889, -1.4433003233456658, -1.4445579504741568, -1.4458035858718297, -1.4470372336342, -1.4482588977201218, -1.44946858195207, -1.4506662900164136, -1.4518520254636773, -1.4530257917088034, -1.4541875920313965, -1.4553374295759627, -1.456475307352142, -1.45760122823493, -1.4587151949648958, -1.4598172101483828, -1.4609072762577118, -1.461985395631367, ...], y_list = [-0.12628890595194583, -0.12474092412220024, -0.12319190290320177, -0.12164185649936006, -0.12009079906869916, -0.118538744723687, -0.11698570753204313, -0.11543170151754695, -0.11387674066083908, -0.11232083890021599, -0.11076401013242251, -0.10920626821343128, -0.10764762695922295, -0.10608810014656032, -0.10452770151375476, -0.10296644476142686, -0.10140434355326625, -0.09984141151678164, -0.09827766224405113, -0.0967131092924626, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-1.43945544856404, -1.440749076829106, -1.442030700253889, -1.4433003233456658, -1.4445579504741568, -1.4458035858718297, -1.4470372336342, -1.4482588977201218, -1.44946858195207, -1.4506662900164136, -1.4518520254636773, -1.4530257917088034, -1.4541875920313965, -1.4553374295759627, -1.456475307352142, -1.45760122823493, -1.4587151949648958, -1.4598172101483828, -1.4609072762577118, -1.461985395631367, ...], y_list=[-0.12628890595194583, -0.12474092412220024, -0.12319190290320177, -0.12164185649936006, -0.12009079906869916, -0.118538744723687, -0.11698570753204313, -0.11543170151754695, -0.11387674066083908, -0.11232083890021599, -0.11076401013242251, -0.10920626821343128, -0.10764762695922295, -0.10608810014656032, -0.10452770151375476, -0.10296644476142686, -0.10140434355326625, -0.09984141151678164, -0.09827766224405113, -0.0967131092924626, ...])
    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([-1.50516807e+00, -1.50481954e+00, -1.5044...27e+00, -1.50582894e+00, -1.50550454e+00]), y = array([-2.77753485e-04, -1.86662927e-03, -3.4554...28e-03, 2.89999203e-03, 1.31112453e-03]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.50516807e+00, -1.50481954e+00, -1.5044...27e+00, -1.50582894e+00, -1.50550454e+00]), array([-2.77753485e-04, -1.86662927e-03, -3.4554...28e-03, 2.89999203e-03, 1.31112453e-03])], 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([-1.50516807e+00, -1.50481954e+00, -1.5044...27e+00, -1.50582894e+00, -1.50550454e+00]), array([-2.77753485e-04, -1.86662927e-03, -3.4554...28e-03, 2.89999203e-03, 1.31112453e-03])], 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([[-1.50516807e+00, -1.50481954e+00, -1.504...48883628e-03, 2.89999203e-03, -2.77753485e-04]]), 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([0.00000000e+00, 3.99138909e-04, 7.9891844...6256e-01, 9.99203579e-01, 1.00000000e+00]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=927, 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([[-1.50516807e+00, -1.50481954e+00, -1.504...48883628e-03, 2.89999203e-03, -2.77753485e-04]]), 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([0.00000000e+00, 3.99138909e-04, 7.9891844...6256e-01, 9.99203579e-01, 1.00000000e+00]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 927, 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>