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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:34:02

Orbital Elements for BU620AB
WDS: BU620AB WDS ID/Discoverer
P: 700.000 Orbital period (years)
a: 1.5 Semi-major axis (arcseconds)
i: 86.3 Inclination (degrees)
Ω: 6.3 Longitude of ascending node (degrees)
T: 2175.650 Epoch of periastron passage (year)
e: 0.859 Eccentricity
ω: 89.5 Longitude of periastron (degrees)
Start-Year: 1675.0 Year
End-Year: 2375.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU620AB
Position: 154612.89-280341.1 Epoch-2000 right ascension and declination
WDS-ID: 15462-2804 WDS designation
Discoverer Code: BU620AB Discover designation and components
ADS number: 9775 Aitken Double Star catalog
HD number: 140722 HD catalog number
Hipparcos number: 77235 Hipparcos catalog number
V1: 7.58 Magnitude of the primary
V2: 7.03 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2021 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU620AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:34:02 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 = [0.2124128384145231, 0.21244700287373589, 0.21247718379091945, 0.2125034043005177, 0.2125256872450683, 0.21254405518017314, 0.21255853037936365, 0.21256913483885448, 0.21257589028219565, 0.21257881816482366, 0.2125779396785108, 0.21257327575500337, 0.21256484707285161, 0.21255267405825312, 0.21253677689095019, 0.2125171755078866, 0.21249388960712084, 0.2124669386516542, 0.21243634187317958, 0.21240211827575334, ...], y_list = [-0.5298201104769614, -0.5267640320464816, -0.5236980763330289, -0.5206223592414193, -0.5175369952619173, -0.5144420974976942, -0.5113377776916955, -0.508224146252857, -0.5051013122817447, -0.5019693835956266, -0.49882846675294984, -0.4956786667310097, -0.4925200883656944, -0.4893528342006303, -0.4861770059934731, -0.4829927043576232, -0.4798000287836815, -0.4765990776604188, -0.4733899482952862, -0.4701727369345186, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.2124128384145231, 0.21244700287373589, 0.21247718379091945, 0.2125034043005177, 0.2125256872450683, 0.21254405518017314, 0.21255853037936365, 0.21256913483885448, 0.21257589028219565, 0.21257881816482366, 0.2125779396785108, 0.21257327575500337, 0.21256484707285161, 0.21255267405825312, 0.21253677689095019, 0.2125171755078866, 0.21249388960712084, 0.2124669386516542, 0.21243634187317958, 0.21240211827575334, ...], y_list=[-0.5298201104769614, -0.5267640320464816, -0.5236980763330289, -0.5206223592414193, -0.5175369952619173, -0.5144420974976942, -0.5113377776916955, -0.508224146252857, -0.5051013122817447, -0.5019693835956266, -0.49882846675294984, -0.4956786667310097, -0.4925200883656944, -0.4893528342006303, -0.4861770059934731, -0.4829927043576232, -0.4798000287836815, -0.4765990776604188, -0.4733899482952862, -0.4701727369345186, ...])
    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([-0.01187706, -0.00626944, -0.00049185, 0... , -0.02615986, -0.02193677, -0.01714703]), y = array([-1.66616864e-02, -6.47137824e-02, -1.1105...79e-01, 7.94926535e-02, 3.18573545e-02]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.01187706, -0.00626944, -0.00049185, 0... , -0.02615986, -0.02193677, -0.01714703]), array([-1.66616864e-02, -6.47137824e-02, -1.1105...79e-01, 7.94926535e-02, 3.18573545e-02])], 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([-0.01187706, -0.00626944, -0.00049185, 0... , -0.02615986, -0.02193677, -0.01714703]), array([-1.66616864e-02, -6.47137824e-02, -1.1105...79e-01, 7.94926535e-02, 3.18573545e-02])], 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([[-0.01187706, -0.00626944, -0.00049185, .... 0.12508918, 0.07949265, -0.01666169]]), 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. , 0.01538419, 0.0302349 , 0.044...3729, 0.9546945 , 0.96925619, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=707, 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([[-0.01187706, -0.00626944, -0.00049185, .... 0.12508918, 0.07949265, -0.01666169]]), 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. , 0.01538419, 0.0302349 , 0.044...3729, 0.9546945 , 0.96925619, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 707, 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>