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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 16:56:24

Orbital Elements for STT531AB
WDS: STT531AB WDS ID/Discoverer
P: 590.000 Orbital period (years)
a: 3.87 Semi-major axis (arcseconds)
i: 104.0 Inclination (degrees)
Ω: 160.3 Longitude of ascending node (degrees)
T: 2070.000 Epoch of periastron passage (year)
e: 0.25 Eccentricity
ω: 195.0 Longitude of periastron (degrees)
Start-Year: 1730.0 Year
End-Year: 2320.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT531AB
Position: 040734.35+380428.3 Epoch-2000 right ascension and declination
WDS-ID: 04076+3804 WDS designation
Discoverer Code: STT531AB Discover designation and components
ADS number: 2995 Aitken Double Star catalog
HD number: 25893 HD catalog number
Hipparcos number: 19255 Hipparcos catalog number
V1: 7.32 Magnitude of the primary
V2: 9.69 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1985 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STT531AB
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ValueError		 Python 3.12.3: /usr/bin/python3
Fri Jul 11 16:56:24 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 = [-1.5642596790147671, -1.5730338407265723, -1.5817127106050175, -1.5902959458742865, -1.5987832068975907, -1.6071741571198659, -1.6154684630116132, -1.6236657940138945, -1.6317658224844551, -1.6397682236449445, -1.6476726755292523, -1.6554788589329068, -1.6631864579861324, -1.6707951574898396, -1.6783046470016842, -1.685714617875539, -1.6930247639901355, -1.7002347817046364, -1.7073443698151958, -1.7143532295125028, ...], y_list = [-4.499145165809378, -4.500498063680042, -4.501578328229099, -4.502386414782459, -4.502922782203634, -4.503187892850658, -4.503182212535501, -4.502906210485954, -4.502360359309941, -4.501545134962228, -4.500461016713491, -4.499108487121711, -4.497488031863255, -4.495600140288893, -4.493445304519879, -4.491024020021698, -4.488336785438256, -4.485384102576585, -4.482166476393668, -4.478684414985397, ...]
 /var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[-1.5642596790147671, -1.5730338407265723, -1.5817127106050175, -1.5902959458742865, -1.5987832068975907, -1.6071741571198659, -1.6154684630116132, -1.6236657940138945, -1.6317658224844551, -1.6397682236449445, -1.6476726755292523, -1.6554788589329068, -1.6631864579861324, -1.6707951574898396, -1.6783046470016842, -1.685714617875539, -1.6930247639901355, -1.7002347817046364, -1.7073443698151958, -1.7143532295125028, ...], y_list=[-4.499145165809378, -4.500498063680042, -4.501578328229099, -4.502386414782459, -4.502922782203634, -4.503187892850658, -4.503182212535501, -4.502906210485954, -4.502360359309941, -4.501545134962228, -4.500461016713491, -4.499108487121711, -4.497488031863255, -4.495600140288893, -4.493445304519879, -4.491024020021698, -4.488336785438256, -4.485384102576585, -4.482166476393668, -4.478684414985397, ...])
    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([-1.02254463e+00, -1.03731050e+00, -1.0519....77606168e-01, -9.92691696e-01, -1.00767145e+00]), y = array([-0.01763252, -0.05442312, -0.09120805, -0...7, 0.09273479, 0.05595034, 0.01915993]), s undefined, per undefined
 /usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-1.02254463e+00, -1.03731050e+00, -1.0519....77606168e-01, -9.92691696e-01, -1.00767145e+00]), array([-0.01763252, -0.05442312, -0.09120805, -0...7, 0.09273479, 0.05595034, 0.01915993])], 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([-1.02254463e+00, -1.03731050e+00, -1.0519....77606168e-01, -9.92691696e-01, -1.00767145e+00]), array([-0.01763252, -0.05442312, -0.09120805, -0...7, 0.09273479, 0.05595034, 0.01915993])], 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([[-1.02254463, -1.0373105 , -1.05196832, .... 0.09273479, 0.05595034, -0.01763252]]), 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. , 0.00240833, 0.0048139 , 0.007...4352, 0.99276067, 0.99517595, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=597, 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([[-1.02254463, -1.0373105 , -1.05196832, .... 0.09273479, 0.05595034, -0.01763252]]), 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. , 0.00240833, 0.0048139 , 0.007...4352, 0.99276067, 0.99517595, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 597, 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>