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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:49:01

Orbital Elements for BU1251AB
WDS: BU1251AB WDS ID/Discoverer
P: 144.000 Orbital period (years)
a: 1.04 Semi-major axis (arcseconds)
i: 148.3 Inclination (degrees)
Ω: 67.0 Longitude of ascending node (degrees)
T: 1949.640 Epoch of periastron passage (year)
e: 0.42 Eccentricity
ω: 150.0 Longitude of periastron (degrees)
Start-Year: 1953.0 Year
End-Year: 2097.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1251AB
Position: 174158.64+155707.8 Epoch-2000 right ascension and declination
WDS-ID: 17420+1557 WDS designation
Discoverer Code: BU1251AB Discover designation and components
ADS number: 10723 Aitken Double Star catalog
HD number: 160910 HD catalog number
Hipparcos number: 86623 Hipparcos catalog number
V1: 5.59 Magnitude of the primary
V2: 9.38 Magnitude of the secondary
Equinox: Equinox
Date: 1989 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU1251AB


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ValueError
Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:49:02 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>
    956 
    957 # Smooth curve if necessary
=>  958 xa_smooth, ya_smooth = Q_get_smoothed_orbit(xa_list, ya_list)
    959 plt.plot(xa_smooth, ya_smooth, label=f'Orbit of {wds}', color='#528B8B')
    960 
xa_smooth undefined, ya_smooth undefined, Q_get_smoothed_orbit = <function Q_get_smoothed_orbit>, xa_list = [-0.5901411860893451, -0.5807925173035281, -0.5663771308460528, -0.5472720230678209, -0.5238978816778354, -0.49669722668208816, -0.46611591138394853, -0.43258870677252254, -0.3965289899315164, -0.3583221035691177, -0.3183217236563911, -0.27684853674228654, -0.23419055854869417, -0.19060455224725775, -0.14631811267772596, -0.10153209828441909, -0.0564231867481969, -0.011146404970012453, 0.03416245998008241, 0.07938462215217465, ...], ya_list = [0.1743302993941456, 0.23322425918114045, 0.2900880101261762, 0.34455477374474136, 0.3963392793876707, 0.4452347562572422, 0.4911058913460735, 0.5338794290071591, 0.5735338428223488, 0.6100891388782567, 0.64359747691391, 0.674134960803414, 0.7017947380839447, 0.7266813730065157, 0.7489063813415878, 0.7685847711436649, 0.7858324245059848, 0.8007641636574198, 0.8134923620968998, 0.8241259821113205, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.5901411860893451, -0.5807925173035281, -0.5663771308460528, -0.5472720230678209, -0.5238978816778354, -0.49669722668208816, -0.46611591138394853, -0.43258870677252254, -0.3965289899315164, -0.3583221035691177, -0.3183217236563911, -0.27684853674228654, -0.23419055854869417, -0.19060455224725775, -0.14631811267772596, -0.10153209828441909, -0.0564231867481969, -0.011146404970012453, 0.03416245998008241, 0.07938462215217465, ...], y_list=[0.1743302993941456, 0.23322425918114045, 0.2900880101261762, 0.34455477374474136, 0.3963392793876707, 0.4452347562572422, 0.4911058913460735, 0.5338794290071591, 0.5735338428223488, 0.6100891388782567, 0.64359747691391, 0.674134960803414, 0.7017947380839447, 0.7266813730065157, 0.7489063813415878, 0.7685847711436649, 0.7858324245059848, 0.8007641636574198, 0.8134923620968998, 0.8241259821113205, ...])
    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([-0.58516001, -0.57213542, -0.55355202, -0...59014119, -0.59014119, -0.59411345, -0.59248979]), y = array([-0.00974677, -0.07170178, -0.13296095, -0...1743303 , 0.1743303 , 0.11385175, 0.05230354]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.58516001, -0.57213542, -0.55355202, -0...59014119, -0.59014119, -0.59411345, -0.59248979]), array([-0.00974677, -0.07170178, -0.13296095, -0...1743303 , 0.1743303 , 0.11385175, 0.05230354])], 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([-0.58516001, -0.57213542, -0.55355202, -0...59014119, -0.59014119, -0.59411345, -0.59248979]), array([-0.00974677, -0.07170178, -0.13296095, -0...1743303 , 0.1743303 , 0.11385175, 0.05230354])], 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([[-0.58516001, -0.57213542, -0.55355202, -...743303 , 0.1743303 , 0.11385175, -0.00974677]]), 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. , 0.01092221, 0.02196633, 0.033... 0.96816438, 0.96816438, 0.97862071, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=151, 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([[-0.58516001, -0.57213542, -0.55355202, -...743303 , 0.1743303 , 0.11385175, -0.00974677]]), 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. , 0.01092221, 0.02196633, 0.033... 0.96816438, 0.96816438, 0.97862071, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 151, 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>