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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:41:19

Orbital Elements for HDS2388
WDS: HDS2388 WDS ID/Discoverer
P: 70.000 Orbital period (years)
a: 0.18 Semi-major axis (arcseconds)
i: 141.2 Inclination (degrees)
Ω: 68.0 Longitude of ascending node (degrees)
T: 2023.670 Epoch of periastron passage (year)
e: 0.404 Eccentricity
ω: 90.8 Longitude of periastron (degrees)
Start-Year: 1990.0 Year
End-Year: 2060.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2388
Position: 165303.20-813540.4 Epoch-2000 right ascension and declination
WDS-ID: 16531-8136 WDS designation
Discoverer Code: HDS2388 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 150140 HD catalog number
Hipparcos number: 82592 Hipparcos catalog number
V1: 8.91 Magnitude of the primary
V2: 9.37 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: Flags

Double Star Orbit for HDS2388
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:41:19 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 = [-0.08975804817051494, -0.09901515505623197, -0.10798118260568142, -0.1166265557451872, -0.12492082796626909, -0.13283244590648718, -0.14032850042991898, -0.14737445995182422, -0.15393388174298664, -0.15996809664821482, -0.16543586239229305, -0.1702929804621632, -0.17449187155692805, -0.17798110497086894, -0.18070487832139925, -0.18260244627303407, -0.1836075009248218, -0.1836475145273497, -0.18264306729156846, -0.18050720559186756, ...], y_list = [-0.1754256358815458, -0.17043064140199154, -0.16493470881482916, -0.15894910868634987, -0.15248513491684204, -0.14555423517760874, -0.13816815916003766, -0.13033912944616374, -0.12208004084155759, -0.11340469551925184, -0.10432808324087808, -0.09486671839768215, -0.0850390488227425, -0.07486595549143903, -0.06437136763858031, -0.053583024660698184, -0.04253342632670428, -0.0312610215609314, -0.01981170492050639, -0.008240703908459544, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.08975804817051494, -0.09901515505623197, -0.10798118260568142, -0.1166265557451872, -0.12492082796626909, -0.13283244590648718, -0.14032850042991898, -0.14737445995182422, -0.15393388174298664, -0.15996809664821482, -0.16543586239229305, -0.1702929804621632, -0.17449187155692805, -0.17798110497086894, -0.18070487832139925, -0.18260244627303407, -0.1836075009248218, -0.1836475145273497, -0.18264306729156846, -0.18050720559186756, ...], y_list=[-0.1754256358815458, -0.17043064140199154, -0.16493470881482916, -0.15894910868634987, -0.15248513491684204, -0.14555423517760874, -0.13816815916003766, -0.13033912944616374, -0.12208004084155759, -0.11340469551925184, -0.10432808324087808, -0.09486671839768215, -0.0850390488227425, -0.07486595549143903, -0.06437136763858031, -0.053583024660698184, -0.04253342632670428, -0.0312610215609314, -0.01981170492050639, -0.008240703908459544, ...])
    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([-0.18050721, -0.18264307, -0.18364751, -0...4, -0.16631945, -0.17245282, -0.17714491]), y = array([-0.0082407 , -0.0198117 , -0.03126102, -0...3, 0.02645556, 0.01498385, 0.00338504]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.18050721, -0.18264307, -0.18364751, -0...4, -0.16631945, -0.17245282, -0.17714491]), array([-0.0082407 , -0.0198117 , -0.03126102, -0...3, 0.02645556, 0.01498385, 0.00338504])], 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([-0.18050721, -0.18264307, -0.18364751, -0...4, -0.16631945, -0.17245282, -0.17714491]), array([-0.0082407 , -0.0198117 , -0.03126102, -0...3, 0.02645556, 0.01498385, 0.00338504])], 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([[-0.18050721, -0.18264307, -0.18364751, -... 0.02645556, 0.01498385, -0.0082407 ]]), 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. , 0.01226847, 0.0242521 , 0.036...2067, 0.96080635, 0.97436972, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=77, 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([[-0.18050721, -0.18264307, -0.18364751, -... 0.02645556, 0.01498385, -0.0082407 ]]), 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. , 0.01226847, 0.0242521 , 0.036...2067, 0.96080635, 0.97436972, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 77, 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>