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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:55:11

Orbital Elements for STF2281AB
WDS: STF2281AB WDS ID/Discoverer
P: 294.000 Orbital period (years)
a: 1.19 Semi-major axis (arcseconds)
i: 103.0 Inclination (degrees)
Ω: 71.0 Longitude of ascending node (degrees)
T: 1912.800 Epoch of periastron passage (year)
e: 0.61 Eccentricity
ω: 307.0 Longitude of periastron (degrees)
Start-Year: 1878.0 Year
End-Year: 2172.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2281AB
Position: 180933.86+035935.8 Epoch-2000 right ascension and declination
WDS-ID: 18096+0400 WDS designation
Discoverer Code: STF2281AB Discover designation and components
ADS number: 11111 Aitken Double Star catalog
HD number: 166233 HD catalog number
Hipparcos number: 88964 Hipparcos catalog number
V1: 5.97 Magnitude of the primary
V2: 7.52 Magnitude of the secondary
Equinox: 2000 Equinox
Date: Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF2281AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:55:11 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 = [0.9348944094312983, 0.9126122779579677, 0.8896365841856019, 0.8659473812794057, 0.8415240853791813, 0.8163455090652734, 0.7903899131099196, 0.763635081578068, 0.7360584266156562, 0.7076371308426332, 0.6783483372176574, 0.6481693986341065, 0.6170782024197654, 0.5850535884194948, 0.5520758834978916, 0.5181275801214279, 0.48319419209659287, 0.447265326329241, 0.4103360151519162, 0.3724083584514313, ...], y_list = [-0.36767841179787203, -0.3646847922565173, -0.36141398171465283, -0.3578532644891117, -0.3539891333754618, -0.3498072361819788, -0.3452923204987989, -0.3404281774758904, -0.3351975857521883, -0.3295822571734172, -0.32356278659683846, -0.31711860895702537, -0.310227967920125, -0.3028679019615666, -0.2950142556554456, -0.2866417264676154, -0.27772396051044346, -0.26823371464849904, -0.258143107106898, -0.2474239843032492, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.9348944094312983, 0.9126122779579677, 0.8896365841856019, 0.8659473812794057, 0.8415240853791813, 0.8163455090652734, 0.7903899131099196, 0.763635081578068, 0.7360584266156562, 0.7076371308426332, 0.6783483372176574, 0.6481693986341065, 0.6170782024197654, 0.5850535884194948, 0.5520758834978916, 0.5181275801214279, 0.48319419209659287, 0.447265326329241, 0.4103360151519162, 0.3724083584514313, ...], y_list=[-0.36767841179787203, -0.3646847922565173, -0.36141398171465283, -0.3578532644891117, -0.3539891333754618, -0.3498072361819788, -0.3452923204987989, -0.3404281774758904, -0.3351975857521883, -0.3295822571734172, -0.32356278659683846, -0.31711860895702537, -0.310227967920125, -0.3028679019615666, -0.2950142556554456, -0.2866417264676154, -0.27772396051044346, -0.26823371464849904, -0.258143107106898, -0.2474239843032492, ...])
    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([-0.26114454, -0.22175669, -0.18070112, -0...39602379, -0.36618687, -0.33362921, -0.29853371]), y = array([-0.00395925, -0.02399346, -0.04384798, -0...0749655 , 0.05571219, 0.0360455 , 0.01610496]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.26114454, -0.22175669, -0.18070112, -0...39602379, -0.36618687, -0.33362921, -0.29853371]), array([-0.00395925, -0.02399346, -0.04384798, -0...0749655 , 0.05571219, 0.0360455 , 0.01610496])], 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([-0.26114454, -0.22175669, -0.18070112, -0...39602379, -0.36618687, -0.33362921, -0.29853371]), array([-0.00395925, -0.02399346, -0.04384798, -0...0749655 , 0.05571219, 0.0360455 , 0.01610496])], 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([[-0.26114454, -0.22175669, -0.18070112, -...749655 , 0.05571219, 0.0360455 , -0.00395925]]), 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. , 0.0099709 , 0.0202609 , 0.030... 0.96472461, 0.97273686, 0.98131928, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=301, 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([[-0.26114454, -0.22175669, -0.18070112, -...749655 , 0.05571219, 0.0360455 , -0.00395925]]), 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. , 0.0099709 , 0.0202609 , 0.030... 0.96472461, 0.97273686, 0.98131928, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 301, 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>