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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:18:30

Orbital Elements for HDS1898
WDS: HDS1898 WDS ID/Discoverer
P: 30.000 Orbital period (years)
a: 0.3056 Semi-major axis (arcseconds)
i: 74.0 Inclination (degrees)
Ω: 251.0 Longitude of ascending node (degrees)
T: 2001.800 Epoch of periastron passage (year)
e: 0.82 Eccentricity
ω: 94.1 Longitude of periastron (degrees)
Start-Year: 2010.0 Year
End-Year: 2040.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1898
Position: 133241.78+223007.3 Epoch-2000 right ascension and declination
WDS-ID: 13327+2230 WDS designation
Discoverer Code: HDS1898 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 66072 Hipparcos catalog number
V1: 10.33 Magnitude of the primary
V2: 10.84 Magnitude of the secondary
Equinox: Equinox
Date: 2019 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS1898


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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:18:31 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>
    956 
    957 # Smooth curve if necessary
=>  958 xa_smooth, ya_smooth = Q_get_smoothed_orbit(xa_list, ya_list)
    959 plt.plot(xa_smooth, ya_smooth, label=f'Orbit of {wds}', color='#528B8B')
    960 
xa_smooth undefined, ya_smooth undefined, Q_get_smoothed_orbit = <function Q_get_smoothed_orbit>, xa_list = [0.13181125436883706, 0.11658290282841867, 0.10017030515137085, 0.08284658776323282, 0.0648308099505885, 0.046306466537455286, 0.027434071746017263, 0.008360395512946161, -0.010774104803192037, -0.02982860466194708, -0.04865512002560879, -0.06709070274744845, -0.08494745107635605, -0.10199852600023837, -0.11795703926282451, -0.13244187603575772, -0.14491818956905034, -0.1545846176089372, -0.16013501607772393, -0.15917329138068015, ...], ya_list = [0.09058067808340284, 0.10348480268048825, 0.11534328023638314, 0.12615714387455235, 0.1359209457640496, 0.1446217604506852, 0.15223829726789354, 0.1587398546167736, 0.1640849269018579, 0.16821927398025088, 0.1710732065836481, 0.17255772135075614, 0.17255890196598514, 0.17092960899827853, 0.167476738900581, 0.1619408517945413, 0.1539617896818354, 0.1430164303344896, 0.128294922345037, 0.10842028453925168, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.13181125436883706, 0.11658290282841867, 0.10017030515137085, 0.08284658776323282, 0.0648308099505885, 0.046306466537455286, 0.027434071746017263, 0.008360395512946161, -0.010774104803192037, -0.02982860466194708, -0.04865512002560879, -0.06709070274744845, -0.08494745107635605, -0.10199852600023837, -0.11795703926282451, -0.13244187603575772, -0.14491818956905034, -0.1545846176089372, -0.16013501607772393, -0.15917329138068015, ...], y_list=[0.09058067808340284, 0.10348480268048825, 0.11534328023638314, 0.12615714387455235, 0.1359209457640496, 0.1446217604506852, 0.15223829726789354, 0.1587398546167736, 0.1640849269018579, 0.16821927398025088, 0.1710732065836481, 0.17255772135075614, 0.17255890196598514, 0.17092960899827853, 0.167476738900581, 0.1619408517945413, 0.1539617896818354, 0.1430164303344896, 0.128294922345037, 0.10842028453925168, ...])
    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([ 0.03588371, 0.12999943, 0.16008865, 0...2, -0.15917329, -0.14640391, -0.10522745]), y = array([-0.02531663, -0.02521116, -0.00810035, 0...2, 0.10842028, 0.08067772, 0.03817303]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([ 0.03588371, 0.12999943, 0.16008865, 0...2, -0.15917329, -0.14640391, -0.10522745]), array([-0.02531663, -0.02521116, -0.00810035, 0...2, 0.10842028, 0.08067772, 0.03817303])], 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([ 0.03588371, 0.12999943, 0.16008865, 0...2, -0.15917329, -0.14640391, -0.10522745]), array([-0.02531663, -0.02521116, -0.00810035, 0...2, 0.10842028, 0.08067772, 0.03817303])], 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([[ 0.03588371, 0.12999943, 0.16008865, ... 0.10842028, 0.08067772, -0.02531663]]), 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. , 0.11271185, 0.15416533, 0.179...6802, 0.71089748, 0.7474721 , 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=37, 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([[ 0.03588371, 0.12999943, 0.16008865, ... 0.10842028, 0.08067772, -0.02531663]]), 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. , 0.11271185, 0.15416533, 0.179...6802, 0.71089748, 0.7474721 , 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 37, 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>