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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:54:54

Orbital Elements for STF1389
WDS: STF1389 WDS ID/Discoverer
P: 1454.000 Orbital period (years)
a: 2.773 Semi-major axis (arcseconds)
i: 122.7 Inclination (degrees)
Ω: 80.9 Longitude of ascending node (degrees)
T: 2420.070 Epoch of periastron passage (year)
e: 0.307 Eccentricity
ω: 265.1 Longitude of periastron (degrees)
Start-Year: 1298.0 Year
End-Year: 2752.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1389
Position: 095226.17+265853.8 Epoch-2000 right ascension and declination
WDS-ID: 09524+2659 WDS designation
Discoverer Code: STF1389 Discover designation and components
ADS number: 7551 Aitken Double Star catalog
HD number: 85441 HD catalog number
Hipparcos number: 48429 Hipparcos catalog number
V1: 9.12 Magnitude of the primary
V2: 9.50 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2013 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for STF1389
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ValueError
Python 3.12.3: /usr/bin/python3
Fri Jul 11 17:54:54 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 = [-2.578475488159942, -2.5766649714197305, -2.57481313570499, -2.572920156540413, -2.570986208935809, -2.569011467385057, -2.566996105865139, -2.564940297835248, -2.562844216235973, -2.560708033488551, -2.5585319214941915, -2.556316051633471, -2.5540605947657973, -2.5517657212289344, -2.549431600838598, -2.5470584028881054, -2.544646296148104, -2.5421954488663436, -2.539706028767512, -2.53717820305314, ...], y_list = [1.0057309767012117, 1.0116506497857336, 1.0175541002700716, 1.0234412911180264, 1.0293121858390417, 1.0351667484820763, 1.0410049436295419, 1.0468267363912858, 1.0526320923986512, 1.0584209777985956, 1.0641933592478607, 1.0699492039072158, 1.0756884794357509, 1.0814111539852302, 1.0871171961945063, 1.092806575184001, 1.0984792605502196, 1.1041352223603462, 1.1097744311468907, 1.1153968579023765, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-2.578475488159942, -2.5766649714197305, -2.57481313570499, -2.572920156540413, -2.570986208935809, -2.569011467385057, -2.566996105865139, -2.564940297835248, -2.562844216235973, -2.560708033488551, -2.5585319214941915, -2.556316051633471, -2.5540605947657973, -2.5517657212289344, -2.549431600838598, -2.5470584028881054, -2.544646296148104, -2.5421954488663436, -2.539706028767512, -2.53717820305314, ...], y_list=[1.0057309767012117, 1.0116506497857336, 1.0175541002700716, 1.0234412911180264, 1.0293121858390417, 1.0351667484820763, 1.0410049436295419, 1.0468267363912858, 1.0526320923986512, 1.0584209777985956, 1.0641933592478607, 1.0699492039072158, 1.0756884794357509, 1.0814111539852302, 1.0871171961945063, 1.092806575184001, 1.0984792605502196, 1.1041352223603462, 1.1097744311468907, 1.1153968579023765, ...])
    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([-2.29249665, -2.28608184, -2.27959769, ..., -2.31132652, -2.30511885, -2.29884228]), y = array([-0.00500837, -0.01244675, -0.01988475, ..., 0.01730678, 0.00986861, 0.00243016]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-2.29249665, -2.28608184, -2.27959769, ..., -2.31132652, -2.30511885, -2.29884228]), array([-0.00500837, -0.01244675, -0.01988475, ..., 0.01730678, 0.00986861, 0.00243016])], 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([-2.29249665, -2.28608184, -2.27959769, ..., -2.31132652, -2.30511885, -2.29884228]), array([-0.00500837, -0.01244675, -0.01988475, ..., 0.01730678, 0.00986861, 0.00243016])], 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([[-2.29249665, -2.28608184, -2.27959769, .... 0.01730678, 0.00986861, -0.00500837]]), w=array([1., 1., 1., ..., 1., 1., 1.]), u=array([0.00000000e+00, 7.41437009e-04, 1.4862808... 9.97795983e-01, 9.98527291e-01, 1.00000000e+00]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=1461, 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([[-2.29249665, -2.28608184, -2.27959769, .... 0.01730678, 0.00986861, -0.00500837]]), w = array([1., 1., 1., ..., 1., 1., 1.]), u = array([0.00000000e+00, 7.41437009e-04, 1.4862808... 9.97795983e-01, 9.98527291e-01, 1.00000000e+00]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 1461, 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>