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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:13:03

Orbital Elements for STF2672
WDS: STF2672 WDS ID/Discoverer
P: 764.000 Orbital period (years)
a: 0.898 Semi-major axis (arcseconds)
i: 41.4 Inclination (degrees)
Ω: 40.6 Longitude of ascending node (degrees)
T: 2121.600 Epoch of periastron passage (year)
e: 0.436 Eccentricity
ω: 41.0 Longitude of periastron (degrees)
Start-Year: 1643.0 Year
End-Year: 2407.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2672
Position: 202136.19+234550.6 Epoch-2000 right ascension and declination
WDS-ID: 20216+2346 WDS designation
Discoverer Code: STF2672 Discover designation and components
ADS number: 13750 Aitken Double Star catalog
HD number: 193817 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 9.34 Magnitude of the primary
V2: 9.60 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2016 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for STF2672
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:13:03 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 = [0.9944551731086144, 0.9969404002578709, 0.9993994222703175, 1.0018322533654336, 1.0042389076769827, 1.0066193992501482, 1.0089737420387432, 1.0113019499024978, 1.0136040366044157, 1.0158800158082046, 1.0181299010757703, 1.0203537058647822, 1.022551443526302, 1.0247231273024742, 1.0268687703242816, 1.0289883856093587, 1.0310819860598641, 1.0331495844604115, 1.0351911934760518, 1.0372068256503173, ...], y_list = [-0.6642551566748701, -0.6614133010349043, -0.6585540597163597, -0.6556775598393233, -0.6527839277656464, -0.6498732891094372, -0.6469457687474426, -0.6440014908293243, -0.6410405787878267, -0.6380631553488452, -0.6350693425413924, -0.6320592617074619, -0.6290330335117967, -0.6259907779515597, -0.6229326143659097, -0.619858661445484, -0.6167690372417907, -0.613663859176506, -0.6105432440506923, -0.6074073080539185, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.9944551731086144, 0.9969404002578709, 0.9993994222703175, 1.0018322533654336, 1.0042389076769827, 1.0066193992501482, 1.0089737420387432, 1.0113019499024978, 1.0136040366044157, 1.0158800158082046, 1.0181299010757703, 1.0203537058647822, 1.022551443526302, 1.0247231273024742, 1.0268687703242816, 1.0289883856093587, 1.0310819860598641, 1.0331495844604115, 1.0351911934760518, 1.0372068256503173, ...], y_list=[-0.6642551566748701, -0.6614133010349043, -0.6585540597163597, -0.6556775598393233, -0.6527839277656464, -0.6498732891094372, -0.6469457687474426, -0.6440014908293243, -0.6410405787878267, -0.6380631553488452, -0.6350693425413924, -0.6320592617074619, -0.6290330335117967, -0.6259907779515597, -0.6229326143659097, -0.619858661445484, -0.6167690372417907, -0.613663859176506, -0.6105432440506923, -0.6074073080539185, ...])
    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([-0.42585775, -0.4238108 , -0.42161087, -0...43248376, -0.43106444, -0.42948609, -0.42775004]), y = array([-1.06416199e-03, -1.15711779e-02, -2.2074...07e-02, 1.99471826e-02, 9.44323662e-03]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.42585775, -0.4238108 , -0.42161087, -0...43248376, -0.43106444, -0.42948609, -0.42775004]), array([-1.06416199e-03, -1.15711779e-02, -2.2074...07e-02, 1.99471826e-02, 9.44323662e-03])], 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([-0.42585775, -0.4238108 , -0.42161087, -0...43248376, -0.43106444, -0.42948609, -0.42775004]), array([-1.06416199e-03, -1.15711779e-02, -2.2074...07e-02, 1.99471826e-02, 9.44323662e-03])], 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([[-0.42585775, -0.4238108 , -0.42161087, .... 0.0304438 , 0.01994718, -0.00106416]]), 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. , 0.00226553, 0.0045366 , 0.006... 0.99100144, 0.99324082, 0.99548731, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=771, 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([[-0.42585775, -0.4238108 , -0.42161087, .... 0.0304438 , 0.01994718, -0.00106416]]), 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. , 0.00226553, 0.0045366 , 0.006... 0.99100144, 0.99324082, 0.99548731, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 771, 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>