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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:38:22

Orbital Elements for STF296AB
WDS: STF296AB WDS ID/Discoverer
P: 2720.000 Orbital period (years)
a: 22.289 Semi-major axis (arcseconds)
i: 75.44 Inclination (degrees)
Ω: 128.0 Longitude of ascending node (degrees)
T: 1613.000 Epoch of periastron passage (year)
e: 0.13 Eccentricity
ω: 100.64 Longitude of periastron (degrees)
Start-Year: 665.0 Year
End-Year: 3385.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF296AB
Position: 024411.99+491342.4 Epoch-2000 right ascension and declination
WDS-ID: 02442+4914 WDS designation
Discoverer Code: STF296AB Discover designation and components
ADS number: 2081 Aitken Double Star catalog
HD number: 16895 HD catalog number
Hipparcos number: 12777 Hipparcos catalog number
V1: 4.16 Magnitude of the primary
V2: 10. Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2015 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF296AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:38:23 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 = [-17.64623249532187, -17.658609319974374, -17.670912418706617, -17.68314169747532, -17.695297062366333, -17.707378419595273, -17.719385675508082, -17.731318736581564, -17.743177509424047, -17.754961900775896, -17.766671817510158, -17.77830716663312, -17.789867855284946, -17.801353790740233, -17.812764880408622, -17.82410103183544, -17.83536215270226, -17.846548150827577, -17.857658934167358, -17.868694410815692, ...], y_list = [-9.266801994858156, -9.289511978181416, -9.312183177140513, -9.334815474591787, -9.35740875338128, -9.37996289634512, -9.402477786309692, -9.42495330609191, -9.447389338499516, -9.469785766331311, -9.492142472377433, -9.51445933941963, -9.536736250231566, -9.558973087579007, -9.581169734220168, -9.603326072905993, -9.625441986380375, -9.647517357380563, -9.669552068637312, -9.691546002875233, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-17.64623249532187, -17.658609319974374, -17.670912418706617, -17.68314169747532, -17.695297062366333, -17.707378419595273, -17.719385675508082, -17.731318736581564, -17.743177509424047, -17.754961900775896, -17.766671817510158, -17.77830716663312, -17.789867855284946, -17.801353790740233, -17.812764880408622, -17.82410103183544, -17.83536215270226, -17.846548150827577, -17.857658934167358, -17.868694410815692, ...], y_list=[-9.266801994858156, -9.289511978181416, -9.312183177140513, -9.334815474591787, -9.35740875338128, -9.37996289634512, -9.402477786309692, -9.42495330609191, -9.447389338499516, -9.469785766331311, -9.492142472377433, -9.51445933941963, -9.536736250231566, -9.558973087579007, -9.581169734220168, -9.603326072905993, -9.625441986380375, -9.647517357380563, -9.669552068637312, -9.691546002875233, ...])
    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([-9.77956974, -9.81100654, -9.84240692, ..., -9.68504205, -9.71658737, -9.74809664]), y = array([-0.00088722, -0.03014004, -0.05939275, ..., 0.08687082, 0.05761831, 0.0283656 ]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-9.77956974, -9.81100654, -9.84240692, ..., -9.68504205, -9.71658737, -9.74809664]), array([-0.00088722, -0.03014004, -0.05939275, ..., 0.08687082, 0.05761831, 0.0283656 ])], 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([-9.77956974, -9.81100654, -9.84240692, ..., -9.68504205, -9.71658737, -9.74809664]), array([-0.00088722, -0.03014004, -0.05939275, ..., 0.08687082, 0.05761831, 0.0283656 ])], 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([[-9.77956974e+00, -9.81100654e+00, -9.842...68708153e-02, 5.76183128e-02, -8.87224974e-04]]), w=array([1., 1., 1., ..., 1., 1., 1.]), u=array([0.00000000e+00, 4.52220612e-04, 9.0415975... 9.98641665e-01, 9.99094721e-01, 1.00000000e+00]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=2727, 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([[-9.77956974e+00, -9.81100654e+00, -9.842...68708153e-02, 5.76183128e-02, -8.87224974e-04]]), w = array([1., 1., 1., ..., 1., 1., 1.]), u = array([0.00000000e+00, 4.52220612e-04, 9.0415975... 9.98641665e-01, 9.99094721e-01, 1.00000000e+00]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 2727, 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>