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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:40:53

Orbital Elements for BU182AB
WDS: BU182AB WDS ID/Discoverer
P: 388.000 Orbital period (years)
a: 0.957 Semi-major axis (arcseconds)
i: 86.93 Inclination (degrees)
Ω: 44.34 Longitude of ascending node (degrees)
T: 1928.600 Epoch of periastron passage (year)
e: 0.464 Eccentricity
ω: 93.7 Longitude of periastron (degrees)
Start-Year: 1831.0 Year
End-Year: 2219.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU182AB
Position: 231705.05-135103.3 Epoch-2000 right ascension and declination
WDS-ID: 23171-1349 WDS designation
Discoverer Code: BU182AB Discover designation and components
ADS number: 16644 Aitken Double Star catalog
HD number: 219617 HD catalog number
Hipparcos number: 114962 Hipparcos catalog number
V1: 8.77 Magnitude of the primary
V2: 9.08 Magnitude of the secondary
Equinox: 2000 Equinox
Date: Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU182AB
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ValueError
Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:40:53 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 = [-0.5448451882580558, -0.5480857846954507, -0.5512406986976865, -0.5543081600332946, -0.5572863580735444, -0.5601734405372659, -0.5629675121955672, -0.5656666335354044, -0.5682688193809798, -0.5707720374719916, -0.5731742069977951, -0.575473197086582, -0.5776668252487686, -0.5797528557738625, -0.5817289980801889, -0.5835929050169631, -0.5853421711183721, -0.5869743308094791, -0.5884868565639957, -0.5898771570141818, ...], y_list = [0.6182800410293183, 0.6206660452160502, 0.6229550209592313, 0.6251451672762294, 0.6272346435376301, 0.6292215682974543, 0.6311040180893014, 0.6328800261878091, 0.6345475813348602, 0.6361046264300428, 0.6375490571849569, 0.6388787207410328, 0.6400914142506621, 0.6411848834215554, 0.6421568210244105, 0.6430048653641263, 0.6437265987150316, 0.6443195457208064, 0.6447811717600702, 0.6451088812788967, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.5448451882580558, -0.5480857846954507, -0.5512406986976865, -0.5543081600332946, -0.5572863580735444, -0.5601734405372659, -0.5629675121955672, -0.5656666335354044, -0.5682688193809798, -0.5707720374719916, -0.5731742069977951, -0.575473197086582, -0.5776668252487686, -0.5797528557738625, -0.5817289980801889, -0.5835929050169631, -0.5853421711183721, -0.5869743308094791, -0.5884868565639957, -0.5898771570141818, ...], y_list=[0.6182800410293183, 0.6206660452160502, 0.6229550209592313, 0.6251451672762294, 0.6272346435376301, 0.6292215682974543, 0.6311040180893014, 0.6328800261878091, 0.6345475813348602, 0.6361046264300428, 0.6375490571849569, 0.6388787207410328, 0.6400914142506621, 0.6411848834215554, 0.6421568210244105, 0.6430048653641263, 0.6437265987150316, 0.6443195457208064, 0.6447811717600702, 0.6451088812788967, ...])
    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([-0.02514118, -0.0072275 , 0.01069847, 0...09607332, -0.07850714, -0.06081063, -0.04301221]), y = array([-0.01361411, -0.03189221, -0.05011604, -0...05942175, 0.04123532, 0.02298046, 0.00468712]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.02514118, -0.0072275 , 0.01069847, 0...09607332, -0.07850714, -0.06081063, -0.04301221]), array([-0.01361411, -0.03189221, -0.05011604, -0...05942175, 0.04123532, 0.02298046, 0.00468712])], 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([-0.02514118, -0.0072275 , 0.01069847, 0...09607332, -0.07850714, -0.06081063, -0.04301221]), array([-0.01361411, -0.03189221, -0.05011604, -0...05942175, 0.04123532, 0.02298046, 0.00468712])], 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([[-0.02514118, -0.0072275 , 0.01069847, ...5942175, 0.04123532, 0.02298046, -0.01361411]]), w=array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1... 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u=array([0. , 0.00749257, 0.01497631, 0.022... 0.97019345, 0.97759584, 0.98503915, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=395, 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([[-0.02514118, -0.0072275 , 0.01069847, ...5942175, 0.04123532, 0.02298046, -0.01361411]]), w = array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1... 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u = array([0. , 0.00749257, 0.01497631, 0.022... 0.97019345, 0.97759584, 0.98503915, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 395, 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>