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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:34:29

Orbital Elements for HU981

WDS:	HU981	WDS ID/Discoverer
P:	934.000	Orbital period (years)
a:	0.612	Semi-major axis (arcseconds)
i:	102.0	Inclination (degrees)
Ω:	53.0	Longitude of ascending node (degrees)
T:	1904.600	Epoch of periastron passage (year)
e:	0.65	Eccentricity
ω:	116.9	Longitude of periastron (degrees)
Start-Year:	1558.0	Year
End-Year:	2492.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU981

Position:	223032.63+613725.6	Epoch-2000 right ascension and declination
WDS-ID:	22305+6137	WDS designation
Discoverer Code:	HU981	Discover designation and components
ADS number:	16011	Aitken Double Star catalog
HD number:	213530	HD catalog number
Hipparcos number:	111112	Hipparcos catalog number
V1:	7.61	Magnitude of the primary
V2:	7.90	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HU981

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ValueError

Python 3.12.3: /usr/bin/python3
Fri Jul 11 19:34:29 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 = [-0.5881646488620057, -0.5887147724708829, -0.5892580039730931, -0.5897943191838423, -0.5903236937508156, -0.5908461031524435, -0.591361522696139, -0.5918699275165133, -0.5923712925735777, -0.592865592650914, -0.5933528023538273, -0.5938328961074752, -0.5943058481549737, -0.5947716325554775, -0.5952302231822424, -0.5956815937206547, -0.5961257176662428, -0.5965625683226611, -0.5969921187996458, -0.5974143420109526, ...], y_list = [0.25230602979472677, 0.25321886502141094, 0.25412873580154405, 0.25503562379574624, 0.2559395105512667, 0.2568403775005862, 0.2577382059599933, 0.25863297712814404, 0.25952467208461083, 0.260413271788405, 0.2612987570764844, 0.26218110866224287, 0.26306030713397893, 0.2639363329533453, 0.2648091664537822, 0.265678787838923, 0.26654517718098797, 0.26740831441915075, 0.2682681793578851, 0.2691247516652961, ...]

/var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-0.5881646488620057, -0.5887147724708829, -0.5892580039730931, -0.5897943191838423, -0.5903236937508156, -0.5908461031524435, -0.591361522696139, -0.5918699275165133, -0.5923712925735777, -0.592865592650914, -0.5933528023538273, -0.5938328961074752, -0.5943058481549737, -0.5947716325554775, -0.5952302231822424, -0.5956815937206547, -0.5961257176662428, -0.5965625683226611, -0.5969921187996458, -0.5974143420109526, ...], y_list=[0.25230602979472677, 0.25321886502141094, 0.25412873580154405, 0.25503562379574624, 0.2559395105512667, 0.2568403775005862, 0.2577382059599933, 0.25863297712814404, 0.25952467208461083, 0.260413271788405, 0.2612987570764844, 0.26218110866224287, 0.26306030713397893, 0.2639363329533453, 0.2648091664537822, 0.265678787838923, 0.26654517718098797, 0.26740831441915075, 0.2682681793578851, 0.2691247516652961, ...])

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([-3.23419800e-01, -3.21734307e-01, -3.2004....28454403e-01, -3.26779859e-01, -3.25101654e-01]), y = array([-0.00061074, -0.00183846, -0.00306616, -0...00430007, 0.0030724 , 0.00184471, 0.00061699]), s undefined, per undefined

/usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-3.23419800e-01, -3.21734307e-01, -3.2004....28454403e-01, -3.26779859e-01, -3.25101654e-01]), array([-0.00061074, -0.00183846, -0.00306616, -0...00430007, 0.0030724 , 0.00184471, 0.00061699])], 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([-3.23419800e-01, -3.21734307e-01, -3.2004....28454403e-01, -3.26779859e-01, -3.25101654e-01]), array([-0.00061074, -0.00183846, -0.00306616, -0...00430007, 0.0030724 , 0.00184471, 0.00061699])], 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([[-0.3234198 , -0.32173431, -0.32004519, .... 0.0030724 , 0.00184471, -0.00061074]]), 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([0.00000000e+00, 9.78700928e-04, 1.9587728... 9.97072193e-01, 9.98046739e-01, 1.00000000e+00]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=941, 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([[-0.3234198 , -0.32173431, -0.32004519, .... 0.0030724 , 0.00184471, -0.00061074]]), 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([0.00000000e+00, 9.78700928e-04, 1.9587728... 9.97072193e-01, 9.98046739e-01, 1.00000000e+00]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 941, 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>