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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:13:40

Orbital Elements for HDS1803
WDS: HDS1803 WDS ID/Discoverer
P: 54.000 Orbital period (years)
a: 0.179 Semi-major axis (arcseconds)
i: 120.4 Inclination (degrees)
Ω: 39.6 Longitude of ascending node (degrees)
T: 1982.800 Epoch of periastron passage (year)
e: 0.26 Eccentricity
ω: 131.7 Longitude of periastron (degrees)
Start-Year: 1998.0 Year
End-Year: 2052.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1803
Position: 125049.66+080557.1 Epoch-2000 right ascension and declination
WDS-ID: 12508+0806 WDS designation
Discoverer Code: HDS1803 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 111660 HD catalog number
Hipparcos number: 62697 Hipparcos catalog number
V1: 9.19 Magnitude of the primary
V2: 9.31 Magnitude of the secondary
Equinox: Equinox
Date: 2021 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS1803


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ValueError
Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:13:41 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>
    956 
    957 # Smooth curve if necessary
=>  958 xa_smooth, ya_smooth = Q_get_smoothed_orbit(xa_list, ya_list)
    959 plt.plot(xa_smooth, ya_smooth, label=f'Orbit of {wds}', color='#528B8B')
    960 
xa_smooth undefined, ya_smooth undefined, Q_get_smoothed_orbit = <function Q_get_smoothed_orbit>, xa_list = [0.05311805765983425, 0.06667266678354658, 0.07960806288842986, 0.09184514203869683, 0.10331677596234567, 0.11396554221800444, 0.12374186748727595, 0.13260251552927332, 0.14050936059251798, 0.14742839706895933, 0.1533289453997323, 0.1581830238399493, 0.16196486144829328, 0.16465053694996126, 0.16621773259309033, 0.16664559912288063, 0.16591473389313127, 0.16400728083236335, 0.16090716840921906, 0.1566005106701502, ...], ya_list = [0.0907946898153625, 0.0797234564672415, 0.06790922805750418, 0.055497473944844306, 0.042621858572898824, 0.029405780480823065, 0.015963838466641626, 0.0024031975810675627, -0.011175153111254311, -0.02467524811237469, -0.03800508904698284, -0.05107567413297191, -0.06380009867854725, -0.07609271708316766, -0.08786835411728187, -0.09904155704240264, -0.1095258817780443, -0.11923321029398033, -0.12807310000997335, -0.13595217276369467, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.05311805765983425, 0.06667266678354658, 0.07960806288842986, 0.09184514203869683, 0.10331677596234567, 0.11396554221800444, 0.12374186748727595, 0.13260251552927332, 0.14050936059251798, 0.14742839706895933, 0.1533289453997323, 0.1581830238399493, 0.16196486144829328, 0.16465053694996126, 0.16621773259309033, 0.16664559912288063, 0.16591473389313127, 0.16400728083236335, 0.16090716840921906, 0.1566005106701502, ...], y_list=[0.0907946898153625, 0.0797234564672415, 0.06790922805750418, 0.055497473944844306, 0.042621858572898824, 0.029405780480823065, 0.015963838466641626, 0.0024031975810675627, -0.011175153111254311, -0.02467524811237469, -0.03800508904698284, -0.05107567413297191, -0.06380009867854725, -0.07609271708316766, -0.08786835411728187, -0.09904155704240264, -0.1095258817780443, -0.11923321029398033, -0.12807310000997335, -0.13595217276369467, ...])
    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([-0.07927693, -0.06699274, -0.05267996, -0...09985585, -0.09947254, -0.09584257, -0.08902804]), y = array([-0.00387869, -0.02613691, -0.0476126 , -0...07913853, 0.06068931, 0.0402623 , 0.01849803]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.07927693, -0.06699274, -0.05267996, -0...09985585, -0.09947254, -0.09584257, -0.08902804]), array([-0.00387869, -0.02613691, -0.0476126 , -0...07913853, 0.06068931, 0.0402623 , 0.01849803])], 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([-0.07927693, -0.06699274, -0.05267996, -0...09985585, -0.09947254, -0.09584257, -0.08902804]), array([-0.00387869, -0.02613691, -0.0476126 , -0...07913853, 0.06068931, 0.0402623 , 0.01849803])], 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([[-0.07927693, -0.06699274, -0.05267996, -...7913853, 0.06068931, 0.0402623 , -0.00387869]]), 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. , 0.02978497, 0.06002116, 0.090... 0.89883764, 0.92045695, 0.94476366, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=61, 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([[-0.07927693, -0.06699274, -0.05267996, -...7913853, 0.06068931, 0.0402623 , -0.00387869]]), 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. , 0.02978497, 0.06002116, 0.090... 0.89883764, 0.92045695, 0.94476366, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 61, 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>