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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:28:40

Orbital Elements for HO391AB
WDS: HO391AB WDS ID/Discoverer
P: 536.000 Orbital period (years)
a: 2.263 Semi-major axis (arcseconds)
i: 128.1 Inclination (degrees)
Ω: 107.7 Longitude of ascending node (degrees)
T: 2016.700 Epoch of periastron passage (year)
e: 0.376 Eccentricity
ω: 70.4 Longitude of periastron (degrees)
Start-Year: 1757.0 Year
End-Year: 2293.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HO391AB
Position: 150407.07-065314.4 Epoch-2000 right ascension and declination
WDS-ID: 15041-0653 WDS designation
Discoverer Code: HO391AB Discover designation and components
ADS number: 9492 Aitken Double Star catalog
HD number: 133352 HD catalog number
Hipparcos number: 73717 Hipparcos catalog number
V1: 7.83 Magnitude of the primary
V2: 11.34 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: n Flags

Double Star Orbit for HO391AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:28:41 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 = [1.4189551425221123, 1.4033600701967042, 1.387690787997173, 1.3719480816839063, 1.3561327375111043, 1.340245542331557, 1.3242872837021615, 1.3082587499902056, 1.2921607304804894, 1.275994015483259, 1.259759396443052, 1.2434576660484464, 1.2270896183427782, 1.2106560488358518, 1.1941577546166753, 1.1775955326266998, 1.1609701865035622, 1.1442825173758773, 1.1275333297590486, 1.11072343032148, ...], y_list = [-1.475891270135845, -1.483859757273816, -1.4917497775815103, -1.4995608677722647, -1.507292563483617, -1.514944399222794, -1.5225159083123851, -1.5300066228361706, -1.5374160735850992, -1.544743790003422, -1.5519893001349334, -1.5591521305693492, -1.5662318063887815, -1.573227851114318, -1.5801397866526912, -1.5869671339955949, -1.593709410398761, -1.6003661331788668, -1.6069368172654432, -1.6134209757096312, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[1.4189551425221123, 1.4033600701967042, 1.387690787997173, 1.3719480816839063, 1.3561327375111043, 1.340245542331557, 1.3242872837021615, 1.3082587499902056, 1.2921607304804894, 1.275994015483259, 1.259759396443052, 1.2434576660484464, 1.2270896183427782, 1.2106560488358518, 1.1941577546166753, 1.1775955326266998, 1.1609701865035622, 1.1442825173758773, 1.1275333297590486, 1.11072343032148, ...], y_list=[-1.475891270135845, -1.483859757273816, -1.4917497775815103, -1.4995608677722647, -1.507292563483617, -1.514944399222794, -1.5225159083123851, -1.5300066228361706, -1.5374160735850992, -1.544743790003422, -1.5519893001349334, -1.5591521305693492, -1.5662318063887815, -1.573227851114318, -1.5801397866526912, -1.5869671339955949, -1.593709410398761, -1.6003661331788668, -1.6069368172654432, -1.6134209757096312, ...])
    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([-1.42651986, -1.44273763, -1.45831912, -1...6, -1.37403001, -1.39216737, -1.40966364]), y = array([-0.00777158, -0.03191941, -0.05605318, -0...6, 0.06464864, 0.04052351, 0.0163797 ]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.42651986, -1.44273763, -1.45831912, -1...6, -1.37403001, -1.39216737, -1.40966364]), array([-0.00777158, -0.03191941, -0.05605318, -0...6, 0.06464864, 0.04052351, 0.0163797 ])], 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([-1.42651986, -1.44273763, -1.45831912, -1...6, -1.37403001, -1.39216737, -1.40966364]), array([-0.00777158, -0.03191941, -0.05605318, -0...6, 0.06464864, 0.04052351, 0.0163797 ])], 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([[-1.42651986, -1.44273763, -1.45831912, .... 0.06464864, 0.04052351, -0.00777158]]), 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. , 0.00261613, 0.00519972, 0.007...0776, 0.99195521, 0.99466974, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=543, 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([[-1.42651986, -1.44273763, -1.45831912, .... 0.06464864, 0.04052351, -0.00777158]]), 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. , 0.00261613, 0.00519972, 0.007...0776, 0.99195521, 0.99466974, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 543, 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>