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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:54:10

Orbital Elements for A831
WDS: A831 WDS ID/Discoverer
P: 300.000 Orbital period (years)
a: 0.501 Semi-major axis (arcseconds)
i: 63.2 Inclination (degrees)
Ω: 174.1 Longitude of ascending node (degrees)
T: 2047.170 Epoch of periastron passage (year)
e: 0.139 Eccentricity
ω: 314.4 Longitude of periastron (degrees)
Start-Year: 1875.0 Year
End-Year: 2175.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A831
Position: 034851.57+114231.7 Epoch-2000 right ascension and declination
WDS-ID: 03489+1143 WDS designation
Discoverer Code: A831 Discover designation and components
ADS number: 2785 Aitken Double Star catalog
HD number: 23874 HD catalog number
Hipparcos number: 17826 Hipparcos catalog number
V1: 8.54 Magnitude of the primary
V2: 10.00 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 A831
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:54:10 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 = [0.25510341857295443, 0.2544844162181062, 0.25378774894125744, 0.2530138265218561, 0.2521630712119693, 0.251235917586167, 0.2502328124032388, 0.2491542144795215, 0.24800059457362406, 0.2467724352823436, 0.2454702309475698, 0.24409448757397864, 0.24264572275733107, 0.2411244656231879, 0.23953125677586276, 0.23786664825744402, 0.23613120351671146, 0.23432549738779418, 0.23245011607840543, 0.23050565716750626, ...], y_list = [0.20420989231038986, 0.21291501485424927, 0.22155516007898277, 0.23012786320591425, 0.2386306843531089, 0.24706120817355984, 0.25541704350030375, 0.26369582299894606, 0.27189520282805857, 0.2800128623078793, 0.28804650359775635, 0.2959938513827557, 0.3038526525698206, 0.31162067599390025, 0.31929571213442787, 0.3268755728425248, 0.3343580910793228, 0.341741120665755, 0.34902253604420713, 0.35620023205238527, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.25510341857295443, 0.2544844162181062, 0.25378774894125744, 0.2530138265218561, 0.2521630712119693, 0.251235917586167, 0.2502328124032388, 0.2491542144795215, 0.24800059457362406, 0.2467724352823436, 0.2454702309475698, 0.24409448757397864, 0.24264572275733107, 0.2411244656231879, 0.23953125677586276, 0.23786664825744402, 0.23613120351671146, 0.23432549738779418, 0.23245011607840543, 0.23050565716750626, ...], y_list=[0.20420989231038986, 0.21291501485424927, 0.22155516007898277, 0.23012786320591425, 0.2386306843531089, 0.24706120817355984, 0.25541704350030375, 0.26369582299894606, 0.27189520282805857, 0.2800128623078793, 0.28804650359775635, 0.2959938513827557, 0.3038526525698206, 0.31162067599390025, 0.31929571213442787, 0.3268755728425248, 0.3343580910793228, 0.341741120665755, 0.34902253604420713, 0.35620023205238527, ...])
    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([-0.20176333, -0.20215884, -0.20242676, -0...4, -0.19982241, -0.20059391, -0.2012413 ]), y = array([-0.00496715, -0.01660926, -0.02824088, -0...8, 0.02994892, 0.01831916, 0.00667808]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.20176333, -0.20215884, -0.20242676, -0...4, -0.19982241, -0.20059391, -0.2012413 ]), array([-0.00496715, -0.01660926, -0.02824088, -0...8, 0.02994892, 0.01831916, 0.00667808])], 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([-0.20176333, -0.20215884, -0.20242676, -0...4, -0.19982241, -0.20059391, -0.2012413 ]), array([-0.00496715, -0.01660926, -0.02824088, -0...8, 0.02994892, 0.01831916, 0.00667808])], 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([[-0.20176333, -0.20215884, -0.20242676, -... 0.02994892, 0.01831916, -0.00496715]]), 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. , 0.0049475 , 0.009889 , 0.014...009 , 0.9851471 , 0.99009735, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=307, 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([[-0.20176333, -0.20215884, -0.20242676, -... 0.02994892, 0.01831916, -0.00496715]]), 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. , 0.0049475 , 0.009889 , 0.014...009 , 0.9851471 , 0.99009735, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 307, 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>