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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:42:39

Orbital Elements for MEL9BC
WDS: MEL9BC WDS ID/Discoverer
P: 36.000 Orbital period (years)
a: 0.444 Semi-major axis (arcseconds)
i: 82.21 Inclination (degrees)
Ω: 8.01 Longitude of ascending node (degrees)
T: 2008.075 Epoch of periastron passage (year)
e: 0.136 Eccentricity
ω: 109.8 Longitude of periastron (degrees)
Start-Year: 2007.0 Year
End-Year: 2043.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MEL9BC
Position: 233500.27+013619.4 Epoch-2000 right ascension and declination
WDS-ID: 23350+0136 WDS designation
Discoverer Code: MEL9BC Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 116384 Hipparcos catalog number
V1: 12.0 Magnitude of the primary
V2: 13.2 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for MEL9BC
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:42:39 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 = [-0.04623422232574267, -0.03151615121525393, -0.015318044887005444, 0.0015960154635320718, 0.018442132730612664, 0.034491939130348405, 0.049128640798204434, 0.06187651192804927, 0.07240582358971925, 0.08052056606127986, 0.08613728551193214, 0.08926160508425261, 0.08996646962810742, 0.08837399790814025, 0.0846414090695037, 0.07895073494722755, 0.07150172363601573, 0.06250728646499891, 0.05219090388058349, 0.040785508895335464, ...], y_list = [-0.04420106501939183, -0.12927966845708, -0.20828549578997776, -0.2775970900839512, -0.3343265417601881, -0.37652984470008244, -0.4032509600984195, -0.414426933014561, -0.4107112669199494, -0.39327316268974033, -0.3636130061983851, -0.32341395614608914, -0.27443394230982743, -0.2184337143238392, -0.15713327818007275, -0.09218888177990675, -0.025183910160628944, 0.042371408390464764, 0.10903519867735775, 0.17342667153512226, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.04623422232574267, -0.03151615121525393, -0.015318044887005444, 0.0015960154635320718, 0.018442132730612664, 0.034491939130348405, 0.049128640798204434, 0.06187651192804927, 0.07240582358971925, 0.08052056606127986, 0.08613728551193214, 0.08926160508425261, 0.08996646962810742, 0.08837399790814025, 0.0846414090695037, 0.07895073494722755, 0.07150172363601573, 0.06250728646499891, 0.05219090388058349, 0.040785508895335464, ...], y_list=[-0.04420106501939183, -0.12927966845708, -0.20828549578997776, -0.2775970900839512, -0.3343265417601881, -0.37652984470008244, -0.4032509600984195, -0.414426933014561, -0.4107112669199494, -0.39327316268974033, -0.3636130061983851, -0.32341395614608914, -0.27443394230982743, -0.2184337143238392, -0.15713327818007275, -0.09218888177990675, -0.025183910160628944, 0.042371408390464764, 0.10903519867735775, 0.17342667153512226, ...])
    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([-0.04623422, -0.04623422, -0.03151615, -0...8, -0.07568402, -0.06872721, -0.05880639]), y = array([-0.04420107, -0.04420107, -0.12927967, -0...7, 0.20790511, 0.12817636, 0.04294471]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.04623422, -0.04623422, -0.03151615, -0...8, -0.07568402, -0.06872721, -0.05880639]), array([-0.04420107, -0.04420107, -0.12927967, -0...7, 0.20790511, 0.12817636, 0.04294471])], 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([-0.04623422, -0.04623422, -0.03151615, -0...8, -0.07568402, -0.06872721, -0.05880639]), array([-0.04420107, -0.04420107, -0.12927967, -0...7, 0.20790511, 0.12817636, 0.04294471])], 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([[-0.04623422, -0.04623422, -0.03151615, -... 0.20790511, 0.12817636, -0.04420107]]), 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. , 0.04779381, 0.092...5658, 0.85947284, 0.90377349, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=43, 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([[-0.04623422, -0.04623422, -0.03151615, -... 0.20790511, 0.12817636, -0.04420107]]), 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. , 0.04779381, 0.092...5658, 0.85947284, 0.90377349, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 43, 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>