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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:32:21

Orbital Elements for DON27
WDS: DON27 WDS ID/Discoverer
P: 460.000 Orbital period (years)
a: 0.588 Semi-major axis (arcseconds)
i: 117.6 Inclination (degrees)
Ω: 43.0 Longitude of ascending node (degrees)
T: 2017.675 Epoch of periastron passage (year)
e: 0.587 Eccentricity
ω: 77.1 Longitude of periastron (degrees)
Start-Year: 1795.0 Year
End-Year: 2255.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for DON27
Position: 015556.74-214931.5 Epoch-2000 right ascension and declination
WDS-ID: 01559-2150 WDS designation
Discoverer Code: DON27 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 11840 HD catalog number
Hipparcos number: 9006 Hipparcos catalog number
V1: 8.79 Magnitude of the primary
V2: 10.60 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2021 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for DON27
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:32:21 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 = [-0.18812975571895996, -0.19109839115815067, -0.19405808097699084, -0.19700868002144586, -0.1999500425931101, -0.20288202241939052, -0.20580447262342055, -0.20871724569368247, -0.21162019379161015, -0.21451316755350114, -0.2173960176117708, -0.22026859363331447, -0.22313074450020134, -0.2259823182782753, -0.2288231621854374, -0.23165312255958623, -0.23447204482620834, -0.23727977346559173, -0.24007615197965204, -0.24286102285834854, ...], y_list = [-0.4199448557824122, -0.417156088650042, -0.4143477938350597, -0.41152008870475765, -0.4086730901244872, -0.40580691448221795, -0.40292167771321863, -0.4000174953248885, -0.39709448207945586, -0.39415275319487075, -0.39119242280947797, -0.3882136049403868, -0.3852164132958163, -0.3822009612997647, -0.3791673621168097, -0.3761157286770604, -0.37304617370126586, -0.3699588097261072, -0.366853749129677, -0.36373110415717, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.18812975571895996, -0.19109839115815067, -0.19405808097699084, -0.19700868002144586, -0.1999500425931101, -0.20288202241939052, -0.20580447262342055, -0.20871724569368247, -0.21162019379161015, -0.21451316755350114, -0.2173960176117708, -0.22026859363331447, -0.22313074450020134, -0.2259823182782753, -0.2288231621854374, -0.23165312255958623, -0.23447204482620834, -0.23727977346559173, -0.24007615197965204, -0.24286102285834854, ...], y_list=[-0.4199448557824122, -0.417156088650042, -0.4143477938350597, -0.41152008870475765, -0.4086730901244872, -0.40580691448221795, -0.40292167771321863, -0.4000174953248885, -0.39709448207945586, -0.39415275319487075, -0.39119242280947797, -0.3882136049403868, -0.3852164132958163, -0.3822009612997647, -0.3791673621168097, -0.3761157286770604, -0.37304617370126586, -0.3699588097261072, -0.366853749129677, -0.36373110415717, ...])
    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([-4.25321850e-01, -4.24722611e-01, -4.2408...83e-01, -4.26396683e-01, -4.25880087e-01]), y = array([-0.00129939, -0.00546217, -0.00962443, -0...5, 0.01118805, 0.00702613, 0.00286351]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-4.25321850e-01, -4.24722611e-01, -4.2408...83e-01, -4.26396683e-01, -4.25880087e-01]), array([-0.00129939, -0.00546217, -0.00962443, -0...5, 0.01118805, 0.00702613, 0.00286351])], 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([-4.25321850e-01, -4.24722611e-01, -4.2408...83e-01, -4.26396683e-01, -4.25880087e-01]), array([-0.00129939, -0.00546217, -0.00962443, -0...5, 0.01118805, 0.00702613, 0.00286351])], 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([[-4.25321850e-01, -4.24722611e-01, -4.240...e-02, 7.02612780e-03, -1.29939462e-03]]), w=array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1..., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u=array([0. , 0.00174544, 0.00349313, 0.005...4156, 0.99477762, 0.99651608, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=467, 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([[-4.25321850e-01, -4.24722611e-01, -4.240...e-02, 7.02612780e-03, -1.29939462e-03]]), w = array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1..., 1., 1., 1., 1., 1., 1., 1., 1., 1., 1.]), u = array([0. , 0.00174544, 0.00349313, 0.005...4156, 0.99477762, 0.99651608, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 467, 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>