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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:17:20

Orbital Elements for STF2
WDS: STF2 WDS ID/Discoverer
P: 540.000 Orbital period (years)
a: 0.995 Semi-major axis (arcseconds)
i: 110.1 Inclination (degrees)
Ω: 171.2 Longitude of ascending node (degrees)
T: 1887.500 Epoch of periastron passage (year)
e: 0.715 Eccentricity
ω: 333.7 Longitude of periastron (degrees)
Start-Year: 1755.0 Year
End-Year: 2295.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2
Position: 000920.18+794252.4 Epoch-2000 right ascension and declination
WDS-ID: 00093+7943 WDS designation
Discoverer Code: STF2 Discover designation and components
ADS number: 102 Aitken Double Star catalog
HD number: 431 HD catalog number
Hipparcos number: 760 Hipparcos catalog number
V1: 6.68 Magnitude of the primary
V2: 6.89 Magnitude of the secondary
Equinox: 2000 Equinox
Date: Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF2
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:17:20 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 = [0.20105900191683237, 0.20232331341151094, 0.20357724745010577, 0.20482062299216613, 0.20605325527383478, 0.20727495569575163, 0.20848553170680725, 0.20968478668354892, 0.21087251980505436, 0.21204852592304846, 0.21321259542705606, 0.21436451410436622, 0.21550406299454491, 0.2166310182382581, 0.21774515092012858, 0.218846226905341, 0.2199340066696924, 0.22100824512277997, 0.2220686914239682, 0.22311508879081257, ...], y_list = [1.3651412739991164, 1.3599602605437167, 1.354709494046625, 1.3493884671053549, 1.3439966633189793, 1.338533557081467, 1.3329986133688825, 1.327391287520209, 1.3217110250115984, 1.3159572612238002, 1.3101294212025387, 1.3042269194115803, 1.2982491594782397, 1.2921955339310558, 1.2860654239293479, 1.2798581989843831, 1.2735732166718277, 1.2672098223351878, 1.2607673487799127, 1.2542451159578178, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.20105900191683237, 0.20232331341151094, 0.20357724745010577, 0.20482062299216613, 0.20605325527383478, 0.20727495569575163, 0.20848553170680725, 0.20968478668354892, 0.21087251980505436, 0.21204852592304846, 0.21321259542705606, 0.21436451410436622, 0.21550406299454491, 0.2166310182382581, 0.21774515092012858, 0.218846226905341, 0.2199340066696924, 0.22100824512277997, 0.2220686914239682, 0.22311508879081257, ...], y_list=[1.3651412739991164, 1.3599602605437167, 1.354709494046625, 1.3493884671053549, 1.3439966633189793, 1.338533557081467, 1.3329986133688825, 1.327391287520209, 1.3217110250115984, 1.3159572612238002, 1.3101294212025387, 1.3042269194115803, 1.2982491594782397, 1.2921955339310558, 1.2860654239293479, 1.2798581989843831, 1.2735732166718277, 1.2672098223351878, 1.2607673487799127, 1.2542451159578178, ...])
    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([-0.23362451, -0.23131749, -0.22890232, -0...7, -0.23993771, -0.23793075, -0.23582761]), y = array([-0.00895867, -0.02071599, -0.03246358, -0...7, 0.02631724, 0.01456289, 0.00280268]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.23362451, -0.23131749, -0.22890232, -0...7, -0.23993771, -0.23793075, -0.23582761]), array([-0.00895867, -0.02071599, -0.03246358, -0...7, 0.02631724, 0.01456289, 0.00280268])], 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([-0.23362451, -0.23131749, -0.22890232, -0...7, -0.23993771, -0.23793075, -0.23582761]), array([-0.00895867, -0.02071599, -0.03246358, -0...7, 0.02631724, 0.01456289, 0.00280268])], 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([[-0.23362451, -0.23131749, -0.22890232, .... 0.02631724, 0.01456289, -0.00895867]]), 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. , 0.0029308 , 0.00586448, 0.008...2324, 0.99123392, 0.99415076, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=547, 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([[-0.23362451, -0.23131749, -0.22890232, .... 0.02631724, 0.01456289, -0.00895867]]), 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. , 0.0029308 , 0.00586448, 0.008...2324, 0.99123392, 0.99415076, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 547, 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>