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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:51:59

Orbital Elements for AC8

WDS:	AC8	WDS ID/Discoverer
P:	1778.000	Orbital period (years)
a:	0.976	Semi-major axis (arcseconds)
i:	67.5	Inclination (degrees)
Ω:	123.9	Longitude of ascending node (degrees)
T:	2018.000	Epoch of periastron passage (year)
e:	0.94	Eccentricity
ω:	256.5	Longitude of periastron (degrees)
Start-Year:	1136.0	Year
End-Year:	2914.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for AC8

Position:	175252.59+294049.7	Epoch-2000 right ascension and declination
WDS-ID:	17529+2941	WDS designation
Discoverer Code:	AC8	Discover designation and components
ADS number:	10866	Aitken Double Star catalog
HD number:	163032	HD catalog number
Hipparcos number:	87524	Hipparcos catalog number
V1:	9.09	Magnitude of the primary
V2:	8.49	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 AC8

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ValueError

Python 3.12.3: /usr/bin/python3
Fri Jul 11 18:51:59 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 = [0.029728676864875056, 0.030248080436590028, 0.030767432264774384, 0.03128673145884803, 0.03180597712798707, 0.03232516838111683, 0.03284430432689611, 0.033363384073712886, 0.03388240672966226, 0.034401371402545684, 0.034920277199854306, 0.03543912322875729, 0.03595790859608918, 0.03647663240834547, 0.0369952937716626, 0.037513891791811686, 0.03803242557418505, 0.038550894223783244, 0.03906929684520775, 0.03958763254264501, ...], y_list = [-0.8293087466614177, -0.8290141143696823, -0.828718063934692, -0.8284205958047556, -0.828121710423809, -0.8278214082314189, -0.827519689662792, -0.8272165551487742, -0.826912005115863, -0.8266060399862077, -0.8262986601776153, -0.8259898661035572, -0.8256796581731745, -0.8253680367912789, -0.825055002358362, -0.8247405552705984, -0.8244246959198497, -0.8241074246936709, -0.8237887419753135, -0.8234686481437301, ...]

/var/www/cgi-bin/ds_orbit.py in Q_get_smoothed_orbit(x_list=[0.029728676864875056, 0.030248080436590028, 0.030767432264774384, 0.03128673145884803, 0.03180597712798707, 0.03232516838111683, 0.03284430432689611, 0.033363384073712886, 0.03388240672966226, 0.034401371402545684, 0.034920277199854306, 0.03543912322875729, 0.03595790859608918, 0.03647663240834547, 0.0369952937716626, 0.037513891791811686, 0.03803242557418505, 0.038550894223783244, 0.03906929684520775, 0.03958763254264501, ...], y_list=[-0.8293087466614177, -0.8290141143696823, -0.828718063934692, -0.8284205958047556, -0.828121710423809, -0.8278214082314189, -0.827519689662792, -0.8272165551487742, -0.826912005115863, -0.8266060399862077, -0.8262986601776153, -0.8259898661035572, -0.8256796581731745, -0.8253680367912789, -0.825055002358362, -0.8247405552705984, -0.8244246959198497, -0.8241074246936709, -0.8237887419753135, -0.8234686481437301, ...])

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([-0.04748685, -0.06029296, -0.07168089, ..., -0.00080695, -0.01743206, -0.03315959]), y = array([-0.00571166, -0.01646449, -0.02683922, ..., 0.02571128, 0.01588536, 0.00520885]), s undefined, per undefined

/usr/lib/python3/dist-packages/scipy/interpolate/_fitpack_py.py in splprep(x=[array([-0.04748685, -0.06029296, -0.07168089, ..., -0.00080695, -0.01743206, -0.03315959]), array([-0.00571166, -0.01646449, -0.02683922, ..., 0.02571128, 0.01588536, 0.00520885])], 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([-0.04748685, -0.06029296, -0.07168089, ..., -0.00080695, -0.01743206, -0.03315959]), array([-0.00571166, -0.01646449, -0.02683922, ..., 0.02571128, 0.01588536, 0.00520885])], 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([[-0.04748685, -0.06029296, -0.07168089, .... 0.02571128, 0.01588536, -0.00571166]]), w=array([1., 1., 1., ..., 1., 1., 1.]), u=array([0. , 0.00711954, 0.0136785 , ..., 0.9760204 , 0.98424262, 1. ]), ub=0, ue=1, k=3, task=0, s=0.0, t=array([], dtype=float64), full_output=0, nest=1785, 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([[-0.04748685, -0.06029296, -0.07168089, .... 0.02571128, 0.01588536, -0.00571166]]), w = array([1., 1., 1., ..., 1., 1., 1.]), u = array([0. , 0.00711954, 0.0136785 , ..., 0.9760204 , 0.98424262, 1. ]), ub = 0, ue = 1, k = 3, task = 0, ipar = False, s = 0.0, nest = 1785, 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>