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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:43:52

Orbital Elements for BU9AB
WDS: BU9AB WDS ID/Discoverer
P: 616.000 Orbital period (years)
a: 1.882 Semi-major axis (arcseconds)
i: 67.3 Inclination (degrees)
Ω: 174.0 Longitude of ascending node (degrees)
T: 1952.000 Epoch of periastron passage (year)
e: 0.1 Eccentricity
ω: 21.5 Longitude of periastron (degrees)
Start-Year: 1717.0 Year
End-Year: 2333.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU9AB
Position: 024703.60+353317.3 Epoch-2000 right ascension and declination
WDS-ID: 02471+3533 WDS designation
Discoverer Code: BU9AB Discover designation and components
ADS number: 2117 Aitken Double Star catalog
HD number: 17240 HD catalog number
Hipparcos number: 12990 Hipparcos catalog number
V1: 6.42 Magnitude of the primary
V2: 8.64 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for BU9AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:43:52 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 = [-0.5380856319104882, -0.5430181867350033, -0.5479055251905346, -0.5527471630665293, -0.5575426174880077, -0.5622914069447057, -0.5669930513208744, -0.5716470719257644, -0.5762529915247915, -0.5808103343714015, -0.5853186262396414, -0.5897773949221955, -0.5941861684317523, -0.5985444777459568, -0.6028518550614264, -0.6071078342691877, -0.6113119509916957, -0.6154637426206331, -0.6195627483555045, -0.6236085092430153, ...], y_list = [1.1651503116355508, 1.1500512435863253, 1.1348564129724132, 1.1195669250471916, 1.1041838950199863, 1.0887084480913078, 1.0731417194879977, 1.0574848544981839, 1.041739008506069, 1.025905347026501, 1.0099850457393027, 0.993979288841182, 0.9778892756829185, 0.9617162110784817, 0.9454613117046853, 0.9291258045701807, 0.9127109270476675, 0.8962179269056122, 0.8796480623394439, 0.8630026020022366, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.5380856319104882, -0.5430181867350033, -0.5479055251905346, -0.5527471630665293, -0.5575426174880077, -0.5622914069447057, -0.5669930513208744, -0.5716470719257644, -0.5762529915247915, -0.5808103343714015, -0.5853186262396414, -0.5897773949221955, -0.5941861684317523, -0.5985444777459568, -0.6028518550614264, -0.6071078342691877, -0.6113119509916957, -0.6154637426206331, -0.6195627483555045, -0.6236085092430153, ...], y_list=[1.1651503116355508, 1.1500512435863253, 1.1348564129724132, 1.1195669250471916, 1.1041838950199863, 1.0887084480913078, 1.0731417194879977, 1.0574848544981839, 1.041739008506069, 1.025905347026501, 1.0099850457393027, 0.993979288841182, 0.9778892756829185, 0.9617162110784817, 0.9454613117046853, 0.9291258045701807, 0.9127109270476675, 0.8962179269056122, 0.8796480623394439, 0.8630026020022366, ...])
    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([-7.47703781e-01, -7.48557283e-01, -7.4933...37e-01, -7.45778959e-01, -7.46777574e-01]), y = array([-0.01591361, -0.03448421, -0.05305145, -0...8, 0.03980027, 0.02123043, 0.00265854]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-7.47703781e-01, -7.48557283e-01, -7.4933...37e-01, -7.45778959e-01, -7.46777574e-01]), array([-0.01591361, -0.03448421, -0.05305145, -0...8, 0.03980027, 0.02123043, 0.00265854])], 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([-7.47703781e-01, -7.48557283e-01, -7.4933...37e-01, -7.45778959e-01, -7.46777574e-01]), array([-0.01591361, -0.03448421, -0.05305145, -0...8, 0.03980027, 0.02123043, 0.00265854])], 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([[-0.74770378, -0.74855728, -0.74933779, .... 0.03980027, 0.02123043, -0.01591361]]), 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. , 0.00216425, 0.00432773, 0.006...3895, 0.99350447, 0.99566994, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=623, 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([[-0.74770378, -0.74855728, -0.74933779, .... 0.03980027, 0.02123043, -0.01591361]]), 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. , 0.00216425, 0.00432773, 0.006...3895, 0.99350447, 0.99566994, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 623, 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>