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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:28:55

Orbital Elements for A689

WDS:	A689	WDS ID/Discoverer
P:	66.000	Orbital period (years)
a:	0.31	Semi-major axis (arcseconds)
i:	103.9	Inclination (degrees)
Ω:	164.0	Longitude of ascending node (degrees)
T:	1935.600	Epoch of periastron passage (year)
e:	0.88	Eccentricity
ω:	65.0	Longitude of periastron (degrees)
Start-Year:	1992.0	Year
End-Year:	2058.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A689

Position:	150708.61-021650.5	Epoch-2000 right ascension and declination
WDS-ID:	15071-0217	WDS designation
Discoverer Code:	A689	Discover designation and components
ADS number:	9504	Aitken Double Star catalog
HD number:	133928	HD catalog number
Hipparcos number:	73982	Hipparcos catalog number
V1:	8.2	Magnitude of the primary
V2:	8.7	Magnitude of the secondary
Equinox:		Equinox
Date:	1982	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for A689

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ValueError

Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:28:55 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 = [0.08745934247316879, 0.07885772518393049, 0.06972787980273612, 0.06001591056065452, 0.049654868418329015, 0.0385614021217098, 0.02663469869900693, 0.01377334876714676, 1.863766627990894e-05, -0.012893785088633217, -0.0015834003983317608, 0.026116907799894302, 0.04723715436857114, 0.06435251717868079, 0.07886287112202335, 0.091491324061051, 0.10266388351194948, 0.11265627354641955, 0.12165926264266307, 0.12981148868898149, ...], y_list = [-0.013356922535965668, -0.023966854350443097, -0.03441320679060944, -0.044567254252161244, -0.054230327746746874, -0.06307537339922642, -0.07051395159696572, -0.07533841152154548, -0.074468650951362, -0.05588378178273381, 0.02917728155636909, 0.09775256461793677, 0.13776953352530458, 0.16579527024673935, 0.18703972666277374, 0.20379631208937957, 0.21729888125977573, 0.22829772399792753, 0.23728818542084978, 0.24461717627345053, ...]

/var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.08745934247316879, 0.07885772518393049, 0.06972787980273612, 0.06001591056065452, 0.049654868418329015, 0.0385614021217098, 0.02663469869900693, 0.01377334876714676, 1.863766627990894e-05, -0.012893785088633217, -0.0015834003983317608, 0.026116907799894302, 0.04723715436857114, 0.06435251717868079, 0.07886287112202335, 0.091491324061051, 0.10266388351194948, 0.11265627354641955, 0.12165926264266307, 0.12981148868898149, ...], y_list=[-0.013356922535965668, -0.023966854350443097, -0.03441320679060944, -0.044567254252161244, -0.054230327746746874, -0.06307537339922642, -0.07051395159696572, -0.07533841152154548, -0.074468650951362, -0.05588378178273381, 0.02917728155636909, 0.09775256461793677, 0.13776953352530458, 0.16579527024673935, 0.18703972666277374, 0.20379631208937957, 0.21729888125977573, 0.22829772399792753, 0.23728818542084978, 0.24461717627345053, ...])

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([-1.28937851e-02, 1.86376663e-05, 1.3773....72371544e-02, 2.61169078e-02, -1.58340040e-03]), y = array([-0.05588378, -0.07446865, -0.07533841, -0...7, 0.13776953, 0.09775256, 0.02917728]), s undefined, per undefined

/usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.28937851e-02, 1.86376663e-05, 1.3773....72371544e-02, 2.61169078e-02, -1.58340040e-03]), array([-0.05588378, -0.07446865, -0.07533841, -0...7, 0.13776953, 0.09775256, 0.02917728])], 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([-1.28937851e-02, 1.86376663e-05, 1.3773....72371544e-02, 2.61169078e-02, -1.58340040e-03]), array([-0.05588378, -0.07446865, -0.07533841, -0...7, 0.13776953, 0.09775256, 0.02917728])], 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([[-1.28937851e-02, 1.86376663e-05, 1.377...e-01, 9.77525646e-02, -5.58837818e-02]]), 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. , 0.0271254 , 0.0436452 , 0.060...0445, 0.75576601, 0.81000237, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=73, 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([[-1.28937851e-02, 1.86376663e-05, 1.377...e-01, 9.77525646e-02, -5.58837818e-02]]), 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. , 0.0271254 , 0.0436452 , 0.060...0445, 0.75576601, 0.81000237, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 73, 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>