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

Double Star Calculator - Orbit

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

Orbital Elements for HDS2865
WDS: HDS2865 WDS ID/Discoverer
P: 50.000 Orbital period (years)
a: 0.1778 Semi-major axis (arcseconds)
i: 131.5 Inclination (degrees)
Ω: 4.2 Longitude of ascending node (degrees)
T: 2018.710 Epoch of periastron passage (year)
e: 0.328 Eccentricity
ω: 131.7 Longitude of periastron (degrees)
Start-Year: 2000.0 Year
End-Year: 2050.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2865
Position: 200541.20-374253.2 Epoch-2000 right ascension and declination
WDS-ID: 20057-3743 WDS designation
Discoverer Code: HDS2865 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 190289 HD catalog number
Hipparcos number: 98979 Hipparcos catalog number
V1: 8.53 Magnitude of the primary
V2: 9.11 Magnitude of the secondary
Equinox: 2000 Equinox
Date: Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS2865
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:11:07 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 = [-0.07422077661373198, -0.06326129161963832, -0.05179107432660021, -0.039879299653566486, -0.027605699167449007, -0.015063565204098597, -0.002363544928598827, 0.010361573130899493, 0.022950862246293, 0.035207865325903864, 0.046891771377960925, 0.057707523713039485, 0.06729611352329827, 0.07522806685744542, 0.08100614763127399, 0.08408745299049275, 0.08393829202881062, 0.0801314192759323, 0.07247529845770605, 0.061129188511633674, ...], y_list = [0.20248242014895312, 0.20604366551323083, 0.20793872678294667, 0.20805690379979763, 0.2062809776514558, 0.2024872412035477, 0.19654619365385823, 0.18832432892418446, 0.17768769982669214, 0.16450832222288497, 0.14867503960730738, 0.13011121488333932, 0.10880245106217418, 0.08483802951479479, 0.05846869953265149, 0.030178382145447574, 0.0007547866505083202, -0.028676932014696115, -0.056711154973573825, -0.08184771440338601, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.07422077661373198, -0.06326129161963832, -0.05179107432660021, -0.039879299653566486, -0.027605699167449007, -0.015063565204098597, -0.002363544928598827, 0.010361573130899493, 0.022950862246293, 0.035207865325903864, 0.046891771377960925, 0.057707523713039485, 0.06729611352329827, 0.07522806685744542, 0.08100614763127399, 0.08408745299049275, 0.08393829202881062, 0.0801314192759323, 0.07247529845770605, 0.061129188511633674, ...], y_list=[0.20248242014895312, 0.20604366551323083, 0.20793872678294667, 0.20805690379979763, 0.2062809776514558, 0.2024872412035477, 0.19654619365385823, 0.18832432892418446, 0.17768769982669214, 0.16450832222288497, 0.14867503960730738, 0.13011121488333932, 0.10880245106217418, 0.08483802951479479, 0.05846869953265149, 0.030178382145447574, 0.0007547866505083202, -0.028676932014696115, -0.056711154973573825, -0.08184771440338601, ...])
    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([-0.1401587 , -0.13515247, -0.12878056, -0...8, -0.14750662, -0.14628374, -0.14385162]), y = array([-0.0051745 , -0.0227029 , -0.0399994 , -0...1, 0.04710211, 0.02987607, 0.01240435]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.1401587 , -0.13515247, -0.12878056, -0...8, -0.14750662, -0.14628374, -0.14385162]), array([-0.0051745 , -0.0227029 , -0.0399994 , -0...1, 0.04710211, 0.02987607, 0.01240435])], 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([-0.1401587 , -0.13515247, -0.12878056, -0...8, -0.14750662, -0.14628374, -0.14385162]), array([-0.0051745 , -0.0227029 , -0.0399994 , -0...1, 0.04710211, 0.02987607, 0.01240435])], 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([[-0.1401587 , -0.13515247, -0.12878056, -... 0.04710211, 0.02987607, -0.0051745 ]]), 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. , 0.02001237, 0.04024823, 0.060...7341, 0.94197929, 0.96093787, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=57, 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([[-0.1401587 , -0.13515247, -0.12878056, -... 0.04710211, 0.02987607, -0.0051745 ]]), 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. , 0.02001237, 0.04024823, 0.060...7341, 0.94197929, 0.96093787, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 57, 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>