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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:40:17

Orbital Elements for BU385AB
WDS: BU385AB WDS ID/Discoverer
P: 830.000 Orbital period (years)
a: 0.623 Semi-major axis (arcseconds)
i: 131.6 Inclination (degrees)
Ω: 44.2 Longitude of ascending node (degrees)
T: 1721.180 Epoch of periastron passage (year)
e: 0.433 Eccentricity
ω: 152.2 Longitude of periastron (degrees)
Start-Year: 1610.0 Year
End-Year: 2440.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU385AB
Position: 231017.15+322913.4 Epoch-2000 right ascension and declination
WDS-ID: 23103+3229 WDS designation
Discoverer Code: BU385AB Discover designation and components
ADS number: 16561 Aitken Double Star catalog
HD number: 218767 HD catalog number
Hipparcos number: 114415 Hipparcos catalog number
V1: 7.44 Magnitude of the primary
V2: 8.23 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2005 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for BU385AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:40:17 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 = [-0.011801421116657563, -0.007603007952802356, -0.0034039131337659217, 0.0007954902889071707, 0.004994819664065184, 0.009193682513722818, 0.013391676302029637, 0.01758838820049649, 0.021783394849559077, 0.025976262116594265, 0.030166544850500226, 0.034353786632964026, 0.038537519526591534, 0.04271726382005665, 0.04689252777047256, 0.051062807343199866, 0.05522758594934412, 0.05938633418120169, 0.06353850954595698, 0.06768355619796541, ...], y_list = [0.4281710980846265, 0.42484208885933467, 0.42147494653666107, 0.4180694938583251, 0.4146255561294429, 0.4111429614183103, 0.4076215407650215, 0.40406112839923936, 0.40046156196744653, 0.39682268276998833, 0.39314433600824655, 0.38942637104228733, 0.3856686416593129, 0.38187100635327226, 0.3780333286159762, 0.37415547724007653, 0.37023732663424885, 0.36627875715095215, 0.36227965542711127, 0.35823991473807254, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.011801421116657563, -0.007603007952802356, -0.0034039131337659217, 0.0007954902889071707, 0.004994819664065184, 0.009193682513722818, 0.013391676302029637, 0.01758838820049649, 0.021783394849559077, 0.025976262116594265, 0.030166544850500226, 0.034353786632964026, 0.038537519526591534, 0.04271726382005665, 0.04689252777047256, 0.051062807343199866, 0.05522758594934412, 0.05938633418120169, 0.06353850954595698, 0.06768355619796541, ...], y_list=[0.4281710980846265, 0.42484208885933467, 0.42147494653666107, 0.4180694938583251, 0.4146255561294429, 0.4111429614183103, 0.4076215407650215, 0.40406112839923936, 0.40046156196744653, 0.39682268276998833, 0.39314433600824655, 0.38942637104228733, 0.3856686416593129, 0.38187100635327226, 0.3780333286159762, 0.37415547724007653, 0.37023732663424885, 0.36627875715095215, 0.36227965542711127, 0.35823991473807254, ...])
    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([-0.6318871 , -0.62994229, -0.62798115, -0...7, -0.63762371, -0.6357278 , -0.6338156 ]), y = array([-0.00098476, -0.00376446, -0.00654406, -0...7, 0.0073542 , 0.00457464, 0.00179496]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.6318871 , -0.62994229, -0.62798115, -0...7, -0.63762371, -0.6357278 , -0.6338156 ]), array([-0.00098476, -0.00376446, -0.00654406, -0...7, 0.0073542 , 0.00457464, 0.00179496])], 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([-0.6318871 , -0.62994229, -0.62798115, -0...7, -0.63762371, -0.6357278 , -0.6338156 ]), array([-0.00098476, -0.00376446, -0.00654406, -0...7, 0.0073542 , 0.00457464, 0.00179496])], 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([[-0.6318871 , -0.62994229, -0.62798115, .... 0.0073542 , 0.00457464, -0.00098476]]), 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. , 0.00107452, 0.00215198, 0.003...314 , 0.99679414, 0.99785981, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=837, 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([[-0.6318871 , -0.62994229, -0.62798115, .... 0.0073542 , 0.00457464, -0.00098476]]), 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. , 0.00107452, 0.00215198, 0.003...314 , 0.99679414, 0.99785981, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 837, 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>