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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 17:37:55

Orbital Elements for B1581
WDS: B1581 WDS ID/Discoverer
P: 250.000 Orbital period (years)
a: 0.43 Semi-major axis (arcseconds)
i: 110.1 Inclination (degrees)
Ω: 303.2 Longitude of ascending node (degrees)
T: 2028.110 Epoch of periastron passage (year)
e: 0.507 Eccentricity
ω: 133.0 Longitude of periastron (degrees)
Start-Year: 1900.0 Year
End-Year: 2150.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B1581
Position: 080702.10-295348.3 Epoch-2000 right ascension and declination
WDS-ID: 08070-2954 WDS designation
Discoverer Code: B1581 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 67473 HD catalog number
Hipparcos number: 39713 Hipparcos catalog number
V1: 9.61 Magnitude of the primary
V2: 9.94 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2020 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for B1581
--> -->
 
 
ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 17:37:55 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 = [0.2661425280286818, 0.27085081054875554, 0.2755090730004792, 0.28011647815882723, 0.28467218404258393, 0.28917534434021197, 0.29362510687259236, 0.2980206135259499, 0.30236099959313584, 0.3066453932090579, 0.31087291478106394, 0.31504267641325373, 0.3191537815387338, 0.3232053236995434, 0.327196386727623, 0.33112604370615, 0.3349933564526358, 0.3387973748965127, 0.3425371364450234, 0.3462116653363928, ...], y_list = [0.3740090668154541, 0.37545360650780113, 0.37682880824924153, 0.3781344495376463, 0.37937030121846665, 0.38053612760404826, 0.3816316860477051, 0.3826567269248345, 0.3836109934492527, 0.38449422151504575, 0.3853061395365384, 0.386046468286249, 0.3867149207640479, 0.3873112019263447, 0.3878350086461027, 0.38828602946690827, 0.38866394444385827, 0.3889684249650818, 0.38919913356985325, 0.38935572376312333, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.2661425280286818, 0.27085081054875554, 0.2755090730004792, 0.28011647815882723, 0.28467218404258393, 0.28917534434021197, 0.29362510687259236, 0.2980206135259499, 0.30236099959313584, 0.3066453932090579, 0.31087291478106394, 0.31504267641325373, 0.3191537815387338, 0.3232053236995434, 0.327196386727623, 0.33112604370615, 0.3349933564526358, 0.3387973748965127, 0.3425371364450234, 0.3462116653363928, ...], y_list=[0.3740090668154541, 0.37545360650780113, 0.37682880824924153, 0.3781344495376463, 0.37937030121846665, 0.38053612760404826, 0.3816316860477051, 0.3826567269248345, 0.3836109934492527, 0.38449422151504575, 0.3853061395365384, 0.386046468286249, 0.3867149207640479, 0.3873112019263447, 0.3878350086461027, 0.38828602946690827, 0.38866394444385827, 0.3889684249650818, 0.38919913356985325, 0.38935572376312333, ...])
    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([-2.14580932e-01, -2.17892173e-01, -2.2099....03528313e-01, -2.07387459e-01, -2.11075391e-01]), y = array([-0.00252403, -0.00897696, -0.0154213 , -0...2, 0.01682649, 0.01038312, 0.00393122]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-2.14580932e-01, -2.17892173e-01, -2.2099....03528313e-01, -2.07387459e-01, -2.11075391e-01]), array([-0.00252403, -0.00897696, -0.0154213 , -0...2, 0.01682649, 0.01038312, 0.00393122])], 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([-2.14580932e-01, -2.17892173e-01, -2.2099....03528313e-01, -2.07387459e-01, -2.11075391e-01]), array([-0.00252403, -0.00897696, -0.0154213 , -0...2, 0.01682649, 0.01038312, 0.00393122])], 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([[-2.14580932e-01, -2.17892173e-01, -2.209...e-02, 1.03831233e-02, -2.52403222e-03]]), 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. , 0.00405327, 0.00805074, 0.011...0704, 0.98754493, 0.99174225, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=257, 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([[-2.14580932e-01, -2.17892173e-01, -2.209...e-02, 1.03831233e-02, -2.52403222e-03]]), 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. , 0.00405327, 0.00805074, 0.011...0704, 0.98754493, 0.99174225, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 257, 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>