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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:33:35

Orbital Elements for HDS2218AB
WDS: HDS2218AB WDS ID/Discoverer
P: 60.000 Orbital period (years)
a: 0.114 Semi-major axis (arcseconds)
i: 143.2 Inclination (degrees)
Ω: 72.3 Longitude of ascending node (degrees)
T: 2024.670 Epoch of periastron passage (year)
e: 0.426 Eccentricity
ω: 287.9 Longitude of periastron (degrees)
Start-Year: 1995.0 Year
End-Year: 2055.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2218AB
Position: 154250.84-614637.8 Epoch-2000 right ascension and declination
WDS-ID: 15428-6147 WDS designation
Discoverer Code: HDS2218AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 139686 HD catalog number
Hipparcos number: 76958 Hipparcos catalog number
V1: 9.65 Magnitude of the primary
V2: 10.64 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2020 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS2218AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:33:35 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 = [0.08732130142297723, 0.09334395076670422, 0.09901202193426506, 0.1043006134152388, 0.10918388849038076, 0.11363480815734699, 0.1176248490981597, 0.12112370075469653, 0.1240989354279204, 0.12651564516530345, 0.12833603920500217, 0.12951899615015228, 0.13001956628003117, 0.12978842220295636, 0.12877126176320183, 0.12690817791956038, 0.12413303029546269, 0.1203728891813893, 0.11554768710895091, 0.10957032682640884, ...], y_list = [0.10148407303093811, 0.0971999777866739, 0.09254669987616146, 0.08753879374928458, 0.08219080801807625, 0.07651748345787354, 0.07053397568517618, 0.06425611112554482, 0.0577006871548536, 0.05088583036508471, 0.043831431047759405, 0.03655967759861693, 0.02909572216794747, 0.02146851913301485, 0.013711892741866804, 0.005865907738116497, -0.0020213551732995005, -0.009891485562500546, -0.01767271425507858, -0.02527594387685966, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.08732130142297723, 0.09334395076670422, 0.09901202193426506, 0.1043006134152388, 0.10918388849038076, 0.11363480815734699, 0.1176248490981597, 0.12112370075469653, 0.1240989354279204, 0.12651564516530345, 0.12833603920500217, 0.12951899615015228, 0.13001956628003117, 0.12978842220295636, 0.12877126176320183, 0.12690817791956038, 0.12413303029546269, 0.1203728891813893, 0.11554768710895091, 0.10957032682640884, ...], y_list=[0.10148407303093811, 0.0971999777866739, 0.09254669987616146, 0.08753879374928458, 0.08219080801807625, 0.07651748345787354, 0.07053397568517618, 0.06425611112554482, 0.0577006871548536, 0.05088583036508471, 0.043831431047759405, 0.03655967759861693, 0.02909572216794747, 0.02146851913301485, 0.013711892741866804, 0.005865907738116497, -0.0020213551732995005, -0.009891485562500546, -0.01767271425507858, -0.02527594387685966, ...])
    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([-0.06389808, -0.05305979, -0.03937016, -0...9, -0.07881268, -0.0765474 , -0.07168341]), y = array([-0.01338702, -0.02641375, -0.03800584, -0...4, 0.02721275, 0.01398528, 0.00029696]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.06389808, -0.05305979, -0.03937016, -0...9, -0.07881268, -0.0765474 , -0.07168341]), array([-0.01338702, -0.02641375, -0.03800584, -0...4, 0.02721275, 0.01398528, 0.00029696])], 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([-0.06389808, -0.05305979, -0.03937016, -0...9, -0.07881268, -0.0765474 , -0.07168341]), array([-0.01338702, -0.02641375, -0.03800584, -0...4, 0.02721275, 0.01398528, 0.00029696])], 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([[-0.06389808, -0.05305979, -0.03937016, -... 0.02721275, 0.01398528, -0.01338702]]), 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. , 0.02769656, 0.05701509, 0.087...9154, 0.92878262, 0.95071645, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=67, 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([[-0.06389808, -0.05305979, -0.03937016, -... 0.02721275, 0.01398528, -0.01338702]]), 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. , 0.02769656, 0.05701509, 0.087...9154, 0.92878262, 0.95071645, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 67, 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>