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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:46:42

Orbital Elements for BU129
WDS: BU129 WDS ID/Discoverer
P: 356.000 Orbital period (years)
a: 0.688 Semi-major axis (arcseconds)
i: 52.4 Inclination (degrees)
Ω: 133.0 Longitude of ascending node (degrees)
T: 2013.700 Epoch of periastron passage (year)
e: 0.862 Eccentricity
ω: 126.5 Longitude of periastron (degrees)
Start-Year: 1847.0 Year
End-Year: 2203.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU129
Position: 172838.77-253038.4 Epoch-2000 right ascension and declination
WDS-ID: 17286-2531 WDS designation
Discoverer Code: BU129 Discover designation and components
ADS number: 10564 Aitken Double Star catalog
HD number: 158140 HD catalog number
Hipparcos number: 85521 Hipparcos catalog number
V1: 7.45 Magnitude of the primary
V2: 8.48 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2017 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for BU129
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:46:42 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 = [-0.9954673991721497, -0.9960265325677479, -0.9965371478270981, -0.996999142001266, -0.9974124081914645, -0.99777683541878, -0.9980923086016675, -0.9983587085111583, -0.9985759117240671, -0.9987437905741474, -0.99886221310114, -0.9989310429976738, -0.9989501395539543, -0.9989193576001859, -0.9988385474466662, -0.99870755482149, -0.9985262208057929, -0.9982943817664722, -0.9980118692862965, -0.9976785100913469, ...], y_list = [-0.0903376734926196, -0.09298402005127944, -0.09562583731126832, -0.09826298884931563, -0.10089533778025743, -0.10352274626310079, -0.10614507555358242, -0.10876218595555105, -0.11137393677160395, -0.1139801862529276, -0.11658079154827795, -0.1191756086520792, -0.12176449235155708, -0.12434729617287915, -0.12692387232622765, -0.1294940716497614, -0.1320577435523986, -0.13461473595536674, -0.13716489523244443, -0.1397080661488474, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.9954673991721497, -0.9960265325677479, -0.9965371478270981, -0.996999142001266, -0.9974124081914645, -0.99777683541878, -0.9980923086016675, -0.9983587085111583, -0.9985759117240671, -0.9987437905741474, -0.99886221310114, -0.9989310429976738, -0.9989501395539543, -0.9989193576001859, -0.9988385474466662, -0.99870755482149, -0.9985262208057929, -0.9982943817664722, -0.9980118692862965, -0.9976785100913469, ...], y_list=[-0.0903376734926196, -0.09298402005127944, -0.09562583731126832, -0.09826298884931563, -0.10089533778025743, -0.10352274626310079, -0.10614507555358242, -0.10876218595555105, -0.11137393677160395, -0.1139801862529276, -0.11658079154827795, -0.1191756086520792, -0.12176449235155708, -0.12434729617287915, -0.12692387232622765, -0.1294940716497614, -0.1320577435523986, -0.13461473595536674, -0.13716489523244443, -0.1397080661488474, ...])
    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([-0.9502471 , -0.95237424, -0.95445418, -0...3, -0.94358217, -0.94585108, -0.94807272]), y = array([-0.00133031, -0.00405241, -0.00677431, -0...1, 0.00683585, 0.00411396, 0.00139186]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.9502471 , -0.95237424, -0.95445418, -0...3, -0.94358217, -0.94585108, -0.94807272]), array([-0.00133031, -0.00405241, -0.00677431, -0...1, 0.00683585, 0.00411396, 0.00139186])], 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([-0.9502471 , -0.95237424, -0.95445418, -0...3, -0.94358217, -0.94585108, -0.94807272]), array([-0.00133031, -0.00405241, -0.00677431, -0...1, 0.00683585, 0.00411396, 0.00139186])], 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([[-0.9502471 , -0.95237424, -0.95445418, -... 0.00683585, 0.00411396, -0.00133031]]), 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. , 0.00130403, 0.00259709, 0.003...7209, 0.99602108, 0.99735866, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=363, 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([[-0.9502471 , -0.95237424, -0.95445418, -... 0.00683585, 0.00411396, -0.00133031]]), 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. , 0.00130403, 0.00259709, 0.003...7209, 0.99602108, 0.99735866, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 363, 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>