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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:08:12

Orbital Elements for MTG4

WDS:	MTG4	WDS ID/Discoverer
P:	60.000	Orbital period (years)
a:	0.703	Semi-major axis (arcseconds)
i:	105.1	Inclination (degrees)
Ω:	168.9	Longitude of ascending node (degrees)
T:	2028.240	Epoch of periastron passage (year)
e:	0.271	Eccentricity
ω:	316.0	Longitude of periastron (degrees)
Start-Year:	1995.0	Year
End-Year:	2055.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MTG4

Position:	194453.80-233759.3	Epoch-2000 right ascension and declination
WDS-ID:	19449-2338	WDS designation
Discoverer Code:	MTG4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	14.1 k	Magnitude of the primary
V2:	15. k	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for MTG4

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ValueError

Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:08:12 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 = [-0.09078490951892289, -0.07394745773535127, -0.05671060343476394, -0.03916978688451805, -0.021419740339238713, -0.003555209854367765, 0.01432831277755607, 0.032133840570363, 0.049762115011326165, 0.06711079665289153, 0.08407361281373679, 0.100539456885219, 0.11639143410382893, 0.131505852643612, 0.14575116465870128, 0.15898687127531083, 0.17106242022787646, 0.18181614745496555, 0.19107434820473862, 0.19865061411205961, ...], y_list = [0.5277811690255365, 0.5727145175027093, 0.6145560806598481, 0.6531047967862051, 0.6881651848744068, 0.7195456932650347, 0.7470572764679606, 0.770512187972758, 0.7897229856405417, 0.8045017633978723, 0.8146596321700359, 0.8200064960156891, 0.8203511903202859, 0.8155020795664455, 0.805268251212999, 0.7894614934123786, 0.7678993111965708, 0.7404093224260447, 0.7068354851841463, 0.6670467449109787, ...]

/var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.09078490951892289, -0.07394745773535127, -0.05671060343476394, -0.03916978688451805, -0.021419740339238713, -0.003555209854367765, 0.01432831277755607, 0.032133840570363, 0.049762115011326165, 0.06711079665289153, 0.08407361281373679, 0.100539456885219, 0.11639143410382893, 0.131505852643612, 0.14575116465870128, 0.15898687127531083, 0.17106242022787646, 0.18181614745496555, 0.19107434820473862, 0.19865061411205961, ...], y_list=[0.5277811690255365, 0.5727145175027093, 0.6145560806598481, 0.6531047967862051, 0.6881651848744068, 0.7195456932650347, 0.7470572764679606, 0.770512187972758, 0.7897229856405417, 0.8045017633978723, 0.8146596321700359, 0.8200064960156891, 0.8203511903202859, 0.8155020795664455, 0.805268251212999, 0.7894614934123786, 0.7678993111965708, 0.7404093224260447, 0.7068354851841463, 0.6670467449109787, ...])

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([-0.21423158, -0.21944441, -0.22279436, -0...8, -0.18896312, -0.1988443 , -0.20731465]), y = array([-0.03852618, -0.09995773, -0.16053507, -0...3, 0.14576631, 0.08479037, 0.02321684]), s undefined, per undefined

/usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.21423158, -0.21944441, -0.22279436, -0...8, -0.18896312, -0.1988443 , -0.20731465]), array([-0.03852618, -0.09995773, -0.16053507, -0...3, 0.14576631, 0.08479037, 0.02321684])], 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([-0.21423158, -0.21944441, -0.22279436, -0...8, -0.18896312, -0.1988443 , -0.20731465]), array([-0.03852618, -0.09995773, -0.16053507, -0...3, 0.14576631, 0.08479037, 0.02321684])], 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([[-0.21423158, -0.21944441, -0.22279436, -... 0.14576631, 0.08479037, -0.03852618]]), 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. , 0.02073876, 0.04114706, 0.061...9062, 0.93741797, 0.95819679, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=67, 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([[-0.21423158, -0.21944441, -0.22279436, -... 0.14576631, 0.08479037, -0.03852618]]), 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. , 0.02073876, 0.04114706, 0.061...9062, 0.93741797, 0.95819679, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 67, 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>