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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:57:30

Orbital Elements for HU66AB
WDS: HU66AB WDS ID/Discoverer
P: 300.000 Orbital period (years)
a: 0.392 Semi-major axis (arcseconds)
i: 123.2 Inclination (degrees)
Ω: 59.7 Longitude of ascending node (degrees)
T: 2022.000 Epoch of periastron passage (year)
e: 0.546 Eccentricity
ω: 269.6 Longitude of periastron (degrees)
Start-Year: 1875.0 Year
End-Year: 2175.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU66AB
Position: 182518.20+484542.5 Epoch-2000 right ascension and declination
WDS-ID: 18253+4846 WDS designation
Discoverer Code: HU66AB Discover designation and components
ADS number: 11344 Aitken Double Star catalog
HD number: 170109 HD catalog number
Hipparcos number: 90284 Hipparcos catalog number
V1: 7.90 Magnitude of the primary
V2: 8.40 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1995 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for HU66AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:57:30 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 = [0.17522567757639496, 0.17900458686125195, 0.1827622131522467, 0.18649809062584155, 0.19021175091225428, 0.1939027228758059, 0.19757053239287325, 0.2012147023302134, 0.20483475169425422, 0.2084301961838148, 0.21200054751377537, 0.2155453132797139, 0.2190639967211719, 0.2225560964811597, 0.22602110636160977, 0.22945851507447915, 0.23286780598819048, 0.2362484568690871, 0.23959993961758835, 0.2429217199986939, ...], y_list = [0.28179470307284854, 0.27944645955635866, 0.27706499100233517, 0.27465055170380803, 0.27220339397040094, 0.26972376825125616, 0.2672119232587042, 0.26466810594981577, 0.26209256208602283, 0.2594855358152163, 0.25684727010546615, 0.25417800680299674, 0.2514779867590853, 0.24874744995837936, 0.2459866356488123, 0.24319578247330847, 0.2403751286034754, 0.23752491187549066, 0.2346453699283878, 0.23173674034496947, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.17522567757639496, 0.17900458686125195, 0.1827622131522467, 0.18649809062584155, 0.19021175091225428, 0.1939027228758059, 0.19757053239287325, 0.2012147023302134, 0.20483475169425422, 0.2084301961838148, 0.21200054751377537, 0.2155453132797139, 0.2190639967211719, 0.2225560964811597, 0.22602110636160977, 0.22945851507447915, 0.23286780598819048, 0.2362484568690871, 0.23959993961758835, 0.2429217199986939, ...], y_list=[0.28179470307284854, 0.27944645955635866, 0.27706499100233517, 0.27465055170380803, 0.27220339397040094, 0.26972376825125616, 0.2672119232587042, 0.26466810594981577, 0.26209256208602283, 0.2594855358152163, 0.25684727010546615, 0.25417800680299674, 0.2514779867590853, 0.24874744995837936, 0.2459866356488123, 0.24319578247330847, 0.2403751286034754, 0.23752491187549066, 0.2346453699283878, 0.23173674034496947, ...])
    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([-0.15088812, -0.14135921, -0.13130041, -0...2, -0.17625442, -0.16833444, -0.15988025]), y = array([-0.00541905, -0.01485546, -0.02423584, -0... , 0.02287986, 0.01347965, 0.00403694]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.15088812, -0.14135921, -0.13130041, -0...2, -0.17625442, -0.16833444, -0.15988025]), array([-0.00541905, -0.01485546, -0.02423584, -0... , 0.02287986, 0.01347965, 0.00403694])], 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([-0.15088812, -0.14135921, -0.13130041, -0...2, -0.17625442, -0.16833444, -0.15988025]), array([-0.00541905, -0.01485546, -0.02423584, -0... , 0.02287986, 0.01347965, 0.00403694])], 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([[-0.15088812, -0.14135921, -0.13130041, -... 0.02287986, 0.01347965, -0.00541905]]), 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. , 0.00777524, 0.01574951, 0.023...5838, 0.97796128, 0.98508786, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=307, 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([[-0.15088812, -0.14135921, -0.13130041, -... 0.02287986, 0.01347965, -0.00541905]]), 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. , 0.00777524, 0.01574951, 0.023...5838, 0.97796128, 0.98508786, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 307, 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>