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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:26:41

Orbital Elements for STT515AB

WDS:	STT515AB	WDS ID/Discoverer
P:	554.000	Orbital period (years)
a:	0.573	Semi-major axis (arcseconds)
i:	142.2	Inclination (degrees)
Ω:	337.2	Longitude of ascending node (degrees)
T:	1907.450	Epoch of periastron passage (year)
e:	0.385	Eccentricity
ω:	112.6	Longitude of periastron (degrees)
Start-Year:	1748.0	Year
End-Year:	2302.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT515AB

Position:	010930.12+471430.6	Epoch-2000 right ascension and declination
WDS-ID:	01095+4715	WDS designation
Discoverer Code:	STT515AB	Discover designation and components
ADS number:	940	Aitken Double Star catalog
HD number:	6811	HD catalog number
Hipparcos number:	5434	Hipparcos catalog number
V1:	4.59	Magnitude of the primary
V2:	5.61	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:	n	Flags

Double Star Orbit for STT515AB

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ValueError

Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:26:41 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 = [0.009496161640617388, 0.013575977661168297, 0.0176547888990368, 0.021732283423651393, 0.025808144472594653, 0.02988205033913106, 0.03395367425710874, 0.03802268428316287, 0.042088743176157226, 0.046151508273797055, 0.05021063136635481, 0.054265758567426055, 0.058316530181652095, 0.06236258056934708, 0.06640353800794307, 0.07043902492549614, 0.07446865628422525, 0.07849204159590435, 0.08250878335491008, 0.08651847722979193, ...], y_list = [0.6633114046247874, 0.6623315422098541, 0.6613026784893364, 0.6602245090272099, 0.659096727101424, 0.657919023699896, 0.6566910875177707, 0.655412604956024, 0.6540832601214909, 0.6527027348284099, 0.6512707086015731, 0.6497868586811801, 0.6482508600295009, 0.6466623853394505, 0.6450211050451953, 0.6433266871747271, 0.6415787979871939, 0.6397771010828076, 0.6379212580115717, 0.636010928152605, ...]

/var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.009496161640617388, 0.013575977661168297, 0.0176547888990368, 0.021732283423651393, 0.025808144472594653, 0.02988205033913106, 0.03395367425710874, 0.03802268428316287, 0.042088743176157226, 0.046151508273797055, 0.05021063136635481, 0.054265758567426055, 0.058316530181652095, 0.06236258056934708, 0.06640353800794307, 0.07043902492549614, 0.07446865628422525, 0.07849204159590435, 0.08250878335491008, 0.08651847722979193, ...], y_list=[0.6633114046247874, 0.6623315422098541, 0.6613026784893364, 0.6602245090272099, 0.659096727101424, 0.657919023699896, 0.6566910875177707, 0.655412604956024, 0.6540832601214909, 0.6527027348284099, 0.6512707086015731, 0.6497868586811801, 0.6482508600295009, 0.6466623853394505, 0.6450211050451953, 0.6433266871747271, 0.6415787979871939, 0.6397771010828076, 0.6379212580115717, 0.636010928152605, ...])

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([-0.55941662, -0.55862421, -0.55778985, -0...56217213, -0.56154484, -0.56087667, -0.56016735]), y = array([-0.00181484, -0.00666642, -0.0115175 , -0...01758927, 0.01273928, 0.00788837, 0.00303688]), s undefined, per undefined

/usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.55941662, -0.55862421, -0.55778985, -0...56217213, -0.56154484, -0.56087667, -0.56016735]), array([-0.00181484, -0.00666642, -0.0115175 , -0...01758927, 0.01273928, 0.00788837, 0.00303688])], 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([-0.55941662, -0.55862421, -0.55778985, -0...56217213, -0.56154484, -0.56087667, -0.56016735]), array([-0.00181484, -0.00666642, -0.0115175 , -0...01758927, 0.01273928, 0.00788837, 0.00303688])], 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([[-0.55941662, -0.55862421, -0.55778985, .... 0.01273928, 0.00788837, -0.00181484]]), w=array([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. , 0.00158841, 0.0031789 , 0.004... 0.99366702, 0.9952472 , 0.99682942, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=561, 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([[-0.55941662, -0.55862421, -0.55778985, .... 0.01273928, 0.00788837, -0.00181484]]), w = array([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. , 0.00158841, 0.0031789 , 0.004... 0.99366702, 0.9952472 , 0.99682942, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 561, 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>