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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:29:29

Orbital Elements for BU350
WDS: BU350 WDS ID/Discoverer
P: 600.000 Orbital period (years)
a: 0.858 Semi-major axis (arcseconds)
i: 139.5 Inclination (degrees)
Ω: 171.1 Longitude of ascending node (degrees)
T: 2021.040 Epoch of periastron passage (year)
e: 0.828 Eccentricity
ω: 181.0 Longitude of periastron (degrees)
Start-Year: 1725.0 Year
End-Year: 2325.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU350
Position: 151539.37-273546.6 Epoch-2000 right ascension and declination
WDS-ID: 15157-2736 WDS designation
Discoverer Code: BU350 Discover designation and components
ADS number: 9552 Aitken Double Star catalog
HD number: 135390 HD catalog number
Hipparcos number: 74675 Hipparcos catalog number
V1: 7.06 Magnitude of the primary
V2: 8.58 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU350
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:29:29 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 = [-0.2713094000399281, -0.2733507065948052, -0.2753871030736687, -0.2774185516923382, -0.27944501451480575, -0.2814664534487895, -0.2834828302412604, -0.28549410647393647, -0.287500243558743, -0.28950120273324165, -0.29149694505601165, -0.2934874314020062, -0.29547262245786193, -0.2974524787171561, -0.29942696047564266, -0.3013960278264227, -0.3033596406550754, -0.30531775863473865, -0.30727034122114355, -0.3092173478981534, ...], y_list = [-1.5443942347786357, -1.5438987926471122, -1.5433756181627791, -1.542824713969829, -1.542246081975676, -1.541639723351044, -1.541005638529946, -1.5403438272095646, -1.5396542883500268, -1.5389370201740715, -1.5381920201666177, -1.537419285074229, -1.5366188109044712, -1.535790592925176, -1.534934625663593, -1.5340509029054463, -1.533139417693888, -1.5322001623283517, -1.5312331283633016, -1.530238306476886, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.2713094000399281, -0.2733507065948052, -0.2753871030736687, -0.2774185516923382, -0.27944501451480575, -0.2814664534487895, -0.2834828302412604, -0.28549410647393647, -0.287500243558743, -0.28950120273324165, -0.29149694505601165, -0.2934874314020062, -0.29547262245786193, -0.2974524787171561, -0.29942696047564266, -0.3013960278264227, -0.3033596406550754, -0.30531775863473865, -0.30727034122114355, -0.3092173478981534, ...], y_list=[-1.5443942347786357, -1.5438987926471122, -1.5433756181627791, -1.542824713969829, -1.542246081975676, -1.541639723351044, -1.541005638529946, -1.5403438272095646, -1.5396542883500268, -1.5389370201740715, -1.5381920201666177, -1.537419285074229, -1.5366188109044712, -1.535790592925176, -1.534934625663593, -1.5340509029054463, -1.533139417693888, -1.5322001623283517, -1.5312331283633016, -1.530238306476886, ...])
    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([-0.24244378, -0.25262822, -0.26232257, -0...7, -0.20852036, -0.22043749, -0.2317286 ]), y = array([-1.34844927e-02, -2.76041131e-02, -4.1670...89e-02, 1.48101444e-02, 6.64033820e-04]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.24244378, -0.25262822, -0.26232257, -0...7, -0.20852036, -0.22043749, -0.2317286 ]), array([-1.34844927e-02, -2.76041131e-02, -4.1670...89e-02, 1.48101444e-02, 6.64033820e-04])], 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([-0.24244378, -0.25262822, -0.26232257, -0...7, -0.20852036, -0.22043749, -0.2317286 ]), array([-1.34844927e-02, -2.76041131e-02, -4.1670...89e-02, 1.48101444e-02, 6.64033820e-04])], 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([[-0.24244378, -0.25262822, -0.26232257, .... 0.02891323, 0.01481014, -0.01348449]]), 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. , 0.00435065, 0.00861987, 0.012...2005, 0.98642808, 0.99104225, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=607, 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([[-0.24244378, -0.25262822, -0.26232257, .... 0.02891323, 0.01481014, -0.01348449]]), 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. , 0.00435065, 0.00861987, 0.012...2005, 0.98642808, 0.99104225, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 607, 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>