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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:38:51

Orbital Elements for STF1169AB
WDS: STF1169AB WDS ID/Discoverer
P: 20000.000 Orbital period (years)
a: 15.0 Semi-major axis (arcseconds)
i: 3.0 Inclination (degrees)
Ω: 15.0 Longitude of ascending node (degrees)
T: 8800.000 Epoch of periastron passage (year)
e: 0.48 Eccentricity
ω: 157.0 Longitude of periastron (degrees)
Start-Year: -7975.0 Year
End-Year: 12025.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1169AB
Position: 081631.05+793003.5 Epoch-2000 right ascension and declination
WDS-ID: 08165+7930 WDS designation
Discoverer Code: STF1169AB Discover designation and components
ADS number: 6646 Aitken Double Star catalog
HD number: 67064 HD catalog number
Hipparcos number: 40527 Hipparcos catalog number
V1: 8.40 Magnitude of the primary
V2: 8.64 Magnitude of the secondary
Equinox: Equinox
Date: 2003 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF1169AB
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ValueError
Python 3.12.3: /usr/bin/python3
Fri Jul 11 17:38:52 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 = [13.808105465023983, 13.809117720532399, 13.810128446170763, 13.811137642572051, 13.812145310368969, 13.813151450193876, 13.81415606267885, 13.81515914845566, 13.816160708155756, 13.8171607424103, 13.81815925185013, 13.819156237105785, 13.8201516988075, 13.821145637585206, 13.822138054068521, 13.823128948886762, 13.824118322668934, 13.825106176043745, 13.826092509639592, 13.827077324084566, ...], y_list = [4.124917696649215, 4.12970480823695, 4.134491462307335, 4.139277658553082, 4.1440633966673, 4.14884867634353, 4.153633497275664, 4.158417859157972, 4.163201761685176, 4.167985204552342, 4.172768187454909, 4.177550710088757, 4.182332772150102, 4.187114373335557, 4.19189551334218, 4.196676191867322, 4.201456408608806, 4.206236163264768, 4.211015455533804, 4.215794285114801, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[13.808105465023983, 13.809117720532399, 13.810128446170763, 13.811137642572051, 13.812145310368969, 13.813151450193876, 13.81415606267885, 13.81515914845566, 13.816160708155756, 13.8171607424103, 13.81815925185013, 13.819156237105785, 13.8201516988075, 13.821145637585206, 13.822138054068521, 13.823128948886762, 13.824118322668934, 13.825106176043745, 13.826092509639592, 13.827077324084566, ...], y_list=[4.124917696649215, 4.12970480823695, 4.134491462307335, 4.139277658553082, 4.1440633966673, 4.14884867634353, 4.153633497275664, 4.158417859157972, 4.163201761685176, 4.167985204552342, 4.172768187454909, 4.177550710088757, 4.182332772150102, 4.187114373335557, 4.19189551334218, 4.196676191867322, 4.201456408608806, 4.206236163264768, 4.211015455533804, 4.215794285114801, ...])
    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([-10.80535533, -10.80279977, -10.80024136,...-10.81300498, -10.81045794, -10.80790806]), y = array([-0.00061163, -0.00634248, -0.01207333, ..., 0.01658093, 0.01085008, 0.00511923]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-10.80535533, -10.80279977, -10.80024136,...-10.81300498, -10.81045794, -10.80790806]), array([-0.00061163, -0.00634248, -0.01207333, ..., 0.01658093, 0.01085008, 0.00511923])], 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([-10.80535533, -10.80279977, -10.80024136,...-10.81300498, -10.81045794, -10.80790806]), array([-0.00061163, -0.00634248, -0.01207333, ..., 0.01658093, 0.01085008, 0.00511923])], 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([[-1.08053553e+01, -1.08027998e+01, -1.080...65809281e-02, 1.08500788e-02, -6.11626814e-04]]), w=array([1., 1., 1., ..., 1., 1., 1.]), u=array([0.00000000e+00, 7.09003645e-05, 1.4181380... 9.99787377e-01, 9.99858238e-01, 1.00000000e+00]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=20007, 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([[-1.08053553e+01, -1.08027998e+01, -1.080...65809281e-02, 1.08500788e-02, -6.11626814e-04]]), w = array([1., 1., 1., ..., 1., 1., 1.]), u = array([0.00000000e+00, 7.09003645e-05, 1.4181380... 9.99787377e-01, 9.99858238e-01, 1.00000000e+00]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 20007, 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>