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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:44:46

Orbital Elements for BU996AB
WDS: BU996AB WDS ID/Discoverer
P: 290.000 Orbital period (years)
a: 4.14 Semi-major axis (arcseconds)
i: 49.58 Inclination (degrees)
Ω: 93.91 Longitude of ascending node (degrees)
T: 2015.000 Epoch of periastron passage (year)
e: 0.55 Eccentricity
ω: 134.14 Longitude of periastron (degrees)
Start-Year: 1880.0 Year
End-Year: 2170.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU996AB
Position: 235225.28+753240.5 Epoch-2000 right ascension and declination
WDS-ID: 23524+7533 WDS designation
Discoverer Code: BU996AB Discover designation and components
ADS number: 17062 Aitken Double Star catalog
HD number: 223778 HD catalog number
Hipparcos number: 117712 Hipparcos catalog number
V1: 6.49 Magnitude of the primary
V2: 11.4 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1983 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU996AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:44:46 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 = [-4.9631415043678135, -4.989845226252337, -5.015911945992465, -5.041336792412967, -5.066114819530343, -5.090241004102547, -5.1137102431303605, -5.136517351307498, -5.158657058416345, -5.180124006666216, -5.200912747970918, -5.2210177411623375, -5.240433349136637, -5.259153835929586, -5.277173363717406, -5.294485989739434, -5.311085663138763, -5.3269662217168685, -5.34212138859814, -5.356544768800085, ...], y_list = [2.4164628959618986, 2.388948857898474, 2.3611298493140302, 2.333008695179426, 2.304588211046184, 2.2758712046229514, 2.246860477371454, 2.2175588261243457, 2.187969044727524, 2.158093925709493, 2.1279362619805275, 2.09749884856441, 2.0667844843657512, 2.0357959739758726, 2.004536129520557, 1.9730077725529005, 1.9412137359948685, 1.9091568661311706, 1.8768400246593455, 1.8442660908000743, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-4.9631415043678135, -4.989845226252337, -5.015911945992465, -5.041336792412967, -5.066114819530343, -5.090241004102547, -5.1137102431303605, -5.136517351307498, -5.158657058416345, -5.180124006666216, -5.200912747970918, -5.2210177411623375, -5.240433349136637, -5.259153835929586, -5.277173363717406, -5.294485989739434, -5.311085663138763, -5.3269662217168685, -5.34212138859814, -5.356544768800085, ...], y_list=[2.4164628959618986, 2.388948857898474, 2.3611298493140302, 2.333008695179426, 2.304588211046184, 2.2758712046229514, 2.246860477371454, 2.2175588261243457, 2.187969044727524, 2.158093925709493, 2.1279362619805275, 2.09749884856441, 2.0667844843657512, 2.0357959739758726, 2.004536129520557, 1.9730077725529005, 1.9412137359948685, 1.9091568661311706, 1.8768400246593455, 1.8442660908000743, ...])
    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([-4.95386304, -4.91811121, -4.8809907 , -4...3, -5.05312283, -5.02134782, -4.98826813]), y = array([-0.0335268 , -0.07387532, -0.11420323, -0...2, 0.08753045, 0.04718677, 0.00683087]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-4.95386304, -4.91811121, -4.8809907 , -4...3, -5.05312283, -5.02134782, -4.98826813]), array([-0.0335268 , -0.07387532, -0.11420323, -0...2, 0.08753045, 0.04718677, 0.00683087])], 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([-4.95386304, -4.91811121, -4.8809907 , -4...3, -5.05312283, -5.02134782, -4.98826813]), array([-0.0335268 , -0.07387532, -0.11420323, -0...2, 0.08753045, 0.04718677, 0.00683087])], 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([[-4.95386304, -4.91811121, -4.8809907 , -... 0.08753045, 0.04718677, -0.0335268 ]]), w=array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1..., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u=array([0. , 0.00270593, 0.00545714, 0.008...0402, 0.99214143, 0.99471912, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=297, 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([[-4.95386304, -4.91811121, -4.8809907 , -... 0.08753045, 0.04718677, -0.0335268 ]]), w = array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1..., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u = array([0. , 0.00270593, 0.00545714, 0.008...0402, 0.99214143, 0.99471912, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 297, 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>