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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:17:50

Orbital Elements for STF2737AB
WDS: STF2737AB WDS ID/Discoverer
P: 104.000 Orbital period (years)
a: 0.609 Semi-major axis (arcseconds)
i: 92.4 Inclination (degrees)
Ω: 105.3 Longitude of ascending node (degrees)
T: 1920.750 Epoch of periastron passage (year)
e: 0.692 Eccentricity
ω: 343.3 Longitude of periastron (degrees)
Start-Year: 1973.0 Year
End-Year: 2077.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2737AB
Position: 205904.54+041737.8 Epoch-2000 right ascension and declination
WDS-ID: 20591+0418 WDS designation
Discoverer Code: STF2737AB Discover designation and components
ADS number: 14499 Aitken Double Star catalog
HD number: 199766 HD catalog number
Hipparcos number: 103569 Hipparcos catalog number
V1: 5.96 Magnitude of the primary
V2: 6.31 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2017 Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF2737AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:17:50 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 = [0.9498214946005747, 0.9538013767691397, 0.9570616261465722, 0.9595977996958338, 0.9614048377076303, 0.9624770431847542, 0.9628080581163949, 0.9623908365516269, 0.9612176141394847, 0.9592798738187857, 0.956568307284556, 0.9530727718017001, 0.9487822418719152, 0.9436847551853089, 0.9377673522022358, 0.9310160086117142, 0.9234155595706509, 0.91494961570538, 0.9056004676835463, 0.8953489802743148, ...], y_list = [0.2725334475303748, 0.2729623472070499, 0.27318529993060503, 0.273201571528339, 0.273010255598294, 0.27261026977991576, 0.27200035123233535, 0.2711790512815822, 0.2701447291808811, 0.26889554492090934, 0.26742945101580456, 0.265744183178658, 0.26383724978669276, 0.26170592002109355, 0.2593472105493163, 0.2567578705984758, 0.253934365163412, 0.2508728565174938, 0.2475691830422298, 0.24401883596642346, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.9498214946005747, 0.9538013767691397, 0.9570616261465722, 0.9595977996958338, 0.9614048377076303, 0.9624770431847542, 0.9628080581163949, 0.9623908365516269, 0.9612176141394847, 0.9592798738187857, 0.956568307284556, 0.9530727718017001, 0.9487822418719152, 0.9436847551853089, 0.9377673522022358, 0.9310160086117142, 0.9234155595706509, 0.91494961570538, 0.9056004676835463, 0.8953489802743148, ...], y_list=[0.2725334475303748, 0.2729623472070499, 0.27318529993060503, 0.273201571528339, 0.273010255598294, 0.27261026977991576, 0.27200035123233535, 0.2711790512815822, 0.2701447291808811, 0.26889554492090934, 0.26742945101580456, 0.265744183178658, 0.26383724978669276, 0.26170592002109355, 0.2593472105493163, 0.2567578705984758, 0.253934365163412, 0.2508728565174938, 0.2475691830422298, 0.24401883596642346, ...])
    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([-0.08509011, -0.12089864, -0.15242454, -0...06934525, 0.03068127, -0.00829546, -0.04713538]), y = array([-0.00973076, -0.02174785, -0.03298277, -0...03858366, 0.02682343, 0.01478062, 0.00254249]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.08509011, -0.12089864, -0.15242454, -0...06934525, 0.03068127, -0.00829546, -0.04713538]), array([-0.00973076, -0.02174785, -0.03298277, -0...03858366, 0.02682343, 0.01478062, 0.00254249])], 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([-0.08509011, -0.12089864, -0.15242454, -0...06934525, 0.03068127, -0.00829546, -0.04713538]), array([-0.00973076, -0.02174785, -0.03298277, -0...03858366, 0.02682343, 0.01478062, 0.00254249])], 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([[-0.08509011, -0.12089864, -0.15242454, -...3858366, 0.02682343, 0.01478062, -0.00973076]]), 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. , 0.01579398, 0.02978857, 0.040... 0.93233543, 0.94923406, 0.96629236, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=111, 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([[-0.08509011, -0.12089864, -0.15242454, -...3858366, 0.02682343, 0.01478062, -0.00973076]]), 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. , 0.01579398, 0.02978857, 0.040... 0.93233543, 0.94923406, 0.96629236, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 111, 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>