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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:25:45

Orbital Elements for B2771
WDS: B2771 WDS ID/Discoverer
P: 80.000 Orbital period (years)
a: 0.468 Semi-major axis (arcseconds)
i: 47.2 Inclination (degrees)
Ω: 57.3 Longitude of ascending node (degrees)
T: 2022.760 Epoch of periastron passage (year)
e: 0.7 Eccentricity
ω: 189.1 Longitude of periastron (degrees)
Start-Year: 1985.0 Year
End-Year: 2065.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B2771
Position: 144246.43-725532.6 Epoch-2000 right ascension and declination
WDS-ID: 14428-7256 WDS designation
Discoverer Code: B2771 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 10.5 Magnitude of the primary
V2: 11.7 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for B2771
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:25:45 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 = [-0.712962203351727, -0.7140491203503311, -0.7142268628449613, -0.7134861009200727, -0.7118160634099258, -0.7092044578780559, -0.7056373766077305, -0.7010991868599793, -0.6955724032737223, -0.6890375398485488, -0.6814729382890335, -0.6728545694873135, -0.6631558026421386, -0.6523471375978562, -0.6403958930589637, -0.6272658427873613, -0.6129167898179109, -0.5973040665427153, -0.5803779457939472, -0.5620829447565823, ...], y_list = [0.32889165451053387, 0.3176883516926501, 0.3060805685795217, 0.29407919049756587, 0.2816948265447674, 0.26893788918318895, 0.2558186775495254, 0.24234746629882167, 0.2285346022576325, 0.2143906116067096, 0.199926320656279, 0.18515299529645057, 0.17008250232899805, 0.15472750135970456, 0.13910167434628043, 0.12322000432088055, 0.10709911781502907, 0.09075771051700193, 0.07421708261837304, 0.05750182016346751, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.712962203351727, -0.7140491203503311, -0.7142268628449613, -0.7134861009200727, -0.7118160634099258, -0.7092044578780559, -0.7056373766077305, -0.7010991868599793, -0.6955724032737223, -0.6890375398485488, -0.6814729382890335, -0.6728545694873135, -0.6631558026421386, -0.6523471375978562, -0.6403958930589637, -0.6272658427873613, -0.6129167898179109, -0.5973040665427153, -0.5803779457939472, -0.5620829447565823, ...], y_list=[0.32889165451053387, 0.3176883516926501, 0.3060805685795217, 0.29407919049756587, 0.2816948265447674, 0.26893788918318895, 0.2558186775495254, 0.24234746629882167, 0.2285346022576325, 0.2143906116067096, 0.199926320656279, 0.18515299529645057, 0.17008250232899805, 0.15472750135970456, 0.13910167434628043, 0.12322000432088055, 0.10709911781502907, 0.09075771051700193, 0.07421708261837304, 0.05750182016346751, ...])
    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([-4.73852198e-01, -4.47611701e-01, -4.1948...00e-01, -5.21130484e-01, -4.98325043e-01]), y = array([-0.01044132, -0.02746622, -0.04437403, -0...2, 0.04064067, 0.0236677 , 0.00662379]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-4.73852198e-01, -4.47611701e-01, -4.1948...00e-01, -5.21130484e-01, -4.98325043e-01]), array([-0.01044132, -0.02746622, -0.04437403, -0...2, 0.04064067, 0.0236677 , 0.00662379])], 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([-4.73852198e-01, -4.47611701e-01, -4.1948...00e-01, -5.21130484e-01, -4.98325043e-01]), array([-0.01044132, -0.02746622, -0.04437403, -0...2, 0.04064067, 0.0236677 , 0.00662379])], 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([[-4.73852198e-01, -4.47611701e-01, -4.194...06406729e-02, 2.36677004e-02, -1.04413164e-02]]), 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. , 0.01394758, 0.02857914, 0.043...1496, 0.96188616, 0.97400487, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=87, 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([[-4.73852198e-01, -4.47611701e-01, -4.194...06406729e-02, 2.36677004e-02, -1.04413164e-02]]), 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. , 0.01394758, 0.02857914, 0.043...1496, 0.96188616, 0.97400487, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 87, 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>