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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:14:16

Orbital Elements for HDS1815

WDS:	HDS1815	WDS ID/Discoverer
P:	100.000	Orbital period (years)
a:	0.31	Semi-major axis (arcseconds)
i:	71.2	Inclination (degrees)
Ω:	17.4	Longitude of ascending node (degrees)
T:	2041.025	Epoch of periastron passage (year)
e:	0.16	Eccentricity
ω:	34.6	Longitude of periastron (degrees)
Start-Year:	1975.0	Year
End-Year:	2075.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1815

Position:	125658.26-543514.3	Epoch-2000 right ascension and declination
WDS-ID:	12570-5435	WDS designation
Discoverer Code:	HDS1815	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	112381	HD catalog number
Hipparcos number:	63204	Hipparcos catalog number
V1:	6.52	Magnitude of the primary
V2:	9.86	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS1815

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ValueError

Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:14:16 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 = [0.08395097769188668, 0.09049735499870136, 0.09678145959553044, 0.10278992757028646, 0.10851037109603962, 0.11393131572867073, 0.11904214226766965, 0.12383303323221356, 0.1282949240019594, 0.13241945824481932, 0.13619894851407918, 0.13962634051317557, 0.14269518218179836, 0.14539959694344273, 0.14773426116636237, 0.14969438578358624, 0.1512757020346742, 0.15247445131077508, 0.1532873791103484, 0.15371173313017453, ...], y_list = [-0.32691251804923754, -0.32953562420627397, -0.3312035095566249, -0.3319279578211766, -0.3317221839702542, -0.33060070719258244, -0.32857924184719095, -0.32567460496988954, -0.3219046389580354, -0.3172881485412257, -0.3118448500435601, -0.3055953332397797, -0.29856103383631627, -0.29076421626416393, -0.28222796600054323, -0.27297619080977603, -0.26303363037255195, -0.2524258738518285, -0.2411793849811052, -0.22932153436679695, ...]

/var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.08395097769188668, 0.09049735499870136, 0.09678145959553044, 0.10278992757028646, 0.10851037109603962, 0.11393131572867073, 0.11904214226766965, 0.12383303323221356, 0.1282949240019594, 0.13241945824481932, 0.13619894851407918, 0.13962634051317557, 0.14269518218179836, 0.14539959694344273, 0.14773426116636237, 0.14969438578358624, 0.1512757020346742, 0.15247445131077508, 0.1532873791103484, 0.15371173313017453, ...], y_list=[-0.32691251804923754, -0.32953562420627397, -0.3312035095566249, -0.3319279578211766, -0.3317221839702542, -0.33060070719258244, -0.32857924184719095, -0.32567460496988954, -0.3219046389580354, -0.3172881485412257, -0.3118448500435601, -0.3055953332397797, -0.29856103383631627, -0.29076421626416393, -0.28222796600054323, -0.27297619080977603, -0.26303363037255195, -0.2524258738518285, -0.2411793849811052, -0.22932153436679695, ...])

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([-8.79254828e-02, -8.22908152e-02, -7.6206...32e-01, -9.76704759e-02, -9.30663712e-02]), y = array([-1.62248192e-02, -3.70108585e-02, -5.7595...22e-02, 2.55010236e-02, 4.65177515e-03]), s undefined, per undefined

/usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-8.79254828e-02, -8.22908152e-02, -7.6206...32e-01, -9.76704759e-02, -9.30663712e-02]), array([-1.62248192e-02, -3.70108585e-02, -5.7595...22e-02, 2.55010236e-02, 4.65177515e-03])], 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([-8.79254828e-02, -8.22908152e-02, -7.6206...32e-01, -9.76704759e-02, -9.30663712e-02]), array([-1.62248192e-02, -3.70108585e-02, -5.7595...22e-02, 2.55010236e-02, 4.65177515e-03])], 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([[-8.79254828e-02, -8.22908152e-02, -7.620...e-02, 2.55010236e-02, -1.62248192e-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. , 0.01575516, 0.03145808, 0.047...8362, 0.95322762, 0.96865338, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=107, 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([[-8.79254828e-02, -8.22908152e-02, -7.620...e-02, 2.55010236e-02, -1.62248192e-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. , 0.01575516, 0.03145808, 0.047...8362, 0.95322762, 0.96865338, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 107, 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>