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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:17:31

Orbital Elements for HDS1880
WDS: HDS1880 WDS ID/Discoverer
P: 100.000 Orbital period (years)
a: 0.196 Semi-major axis (arcseconds)
i: 159.1 Inclination (degrees)
Ω: 148.8 Longitude of ascending node (degrees)
T: 2016.232 Epoch of periastron passage (year)
e: 0.746 Eccentricity
ω: 268.4 Longitude of periastron (degrees)
Start-Year: 1975.0 Year
End-Year: 2075.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1880
Position: 132342.55+125650.5 Epoch-2000 right ascension and declination
WDS-ID: 13237+1257 WDS designation
Discoverer Code: HDS1880 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 65358 Hipparcos catalog number
V1: 9.59 Magnitude of the primary
V2: 10.94 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2018 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for HDS1880
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:17:31 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 = [-0.25011108057069614, -0.24592131491715027, -0.2415337763751703, -0.2369484944653756, -0.23216534727562171, -0.22718406208427963, -0.2220042156068066, -0.21662523444089601, -0.21104639480994206, -0.2052668228566628, -0.19928549491923975, -0.1931012382628791, -0.18671273251093862, -0.18011851215175742, -0.17331697062487836, -0.16630636666556375, -0.15908483382861896, -0.15165039444952677, -0.14400097977385382, -0.13613445865582322, ...], y_list = [0.18828652303055748, 0.19113561126476855, 0.19383097209075545, 0.19636762780242595, 0.1987402872002337, 0.20094331371249463, 0.20297068975460425, 0.20481597650821737, 0.20647226878168512, 0.20793214361053053, 0.20918760183839338, 0.21023000129132477, 0.2110499800070789, 0.21163736762005184, 0.21198108256620668, 0.2120690122164401, 0.2118878723332477, 0.21142304132211576, 0.21065836354385342, 0.2095759143667153, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.25011108057069614, -0.24592131491715027, -0.2415337763751703, -0.2369484944653756, -0.23216534727562171, -0.22718406208427963, -0.2220042156068066, -0.21662523444089601, -0.21104639480994206, -0.2052668228566628, -0.19928549491923975, -0.1931012382628791, -0.18671273251093862, -0.18011851215175742, -0.17331697062487836, -0.16630636666556375, -0.15908483382861896, -0.15165039444952677, -0.14400097977385382, -0.13613445865582322, ...], y_list=[0.18828652303055748, 0.19113561126476855, 0.19383097209075545, 0.19636762780242595, 0.1987402872002337, 0.20094331371249463, 0.20297068975460425, 0.20481597650821737, 0.20647226878168512, 0.20793214361053053, 0.20918760183839338, 0.21023000129132477, 0.2110499800070789, 0.21163736762005184, 0.21198108256620668, 0.2120690122164401, 0.2118878723332477, 0.21142304132211576, 0.21065836354385342, 0.2095759143667153, ...])
    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([-0.23652996, -0.23007691, -0.22313864, -0... , -0.25323288, -0.24808524, -0.24252475]), y = array([-6.17750502e-03, -1.23555614e-02, -1.8507...42e-02, 6.20299789e-03, 1.26875668e-05]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.23652996, -0.23007691, -0.22313864, -0... , -0.25323288, -0.24808524, -0.24252475]), array([-6.17750502e-03, -1.23555614e-02, -1.8507...42e-02, 6.20299789e-03, 1.26875668e-05])], 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([-0.23652996, -0.23007691, -0.22313864, -0... , -0.25323288, -0.24808524, -0.24252475]), array([-6.17750502e-03, -1.23555614e-02, -1.8507...42e-02, 6.20299789e-03, 1.26875668e-05])], 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([[-0.23652996, -0.23007691, -0.22313864, -... 0.0123831 , 0.006203 , -0.00617751]]), 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. , 0.00900972, 0.01836143, 0.028...6083, 0.974809 , 0.98292061, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=107, 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([[-0.23652996, -0.23007691, -0.22313864, -... 0.0123831 , 0.006203 , -0.00617751]]), 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. , 0.00900972, 0.01836143, 0.028...6083, 0.974809 , 0.98292061, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 107, 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>