Double Star Calculator - Orbit

Orbital Elements for I129AB
WDS: I129AB WDS ID/Discoverer
P: 1743.121 Orbital period (years)
a: 11.62162 Semi-major axis (arcseconds)
i: 99.648 Inclination (degrees)
Ω: 90.748 Longitude of ascending node (degrees)
T: 1763.602 Epoch of periastron passage (year)
e: 0.94298 Eccentricity
ω: 289.829 Longitude of periastron (degrees)
Start-Year: 1153.4396000000002 Year
End-Year: 2896.5604 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for I129AB
Position: 205626.63-591625.0 Epoch-2000 right ascension and declination
WDS-ID: 20564-5916 WDS designation
Discoverer Code: I129AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 198943 HD catalog number
Hipparcos number: 103361 Hipparcos catalog number
V1: 8.22 Magnitude of the primary
V2: 9.96 Magnitude of the secondary
Equinox: Equinox
Date: 2014 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for I129AB



WDS 6th Orbit including measures of I129AB

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --


Legend:
Green plus signs:Visual (micrometric) measures
Violet asterisks:Photographic measures
Blue symbols:Various interferometric techniques
Dot-dash line:Indicates the line of nodes

Ephemeris of I129AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.783   332.40
--------------------------
1153.44    9.484   290.70
1163.44    9.500   290.53
1173.44    9.515   290.35
1183.44    9.527   290.18
1193.44    9.538   290.01
1203.44    9.546   289.84
1213.44    9.553   289.67
1223.44    9.557   289.50
1233.44    9.559   289.33
1243.44    9.559   289.16
1253.44    9.556   288.99
1263.44    9.552   288.82
1273.44    9.544   288.65
1283.44    9.535   288.48
1293.44    9.522   288.31
1303.44    9.508   288.13
1313.44    9.490   287.96
1323.44    9.470   287.79
1333.44    9.447   287.61
1343.44    9.421   287.44
1353.44    9.392   287.26
1363.44    9.361   287.09
1373.44    9.326   286.91
1383.44    9.288   286.73
1393.44    9.246   286.55
1403.44    9.201   286.36
1413.44    9.153   286.18
1423.44    9.100   285.99
1433.44    9.044   285.80
1443.44    8.984   285.61
1453.44    8.920   285.42
1463.44    8.852   285.22
1473.44    8.779   285.02
1483.44    8.701   284.82
1493.44    8.618   284.61
1503.44    8.530   284.40
1513.44    8.436   284.18
1523.44    8.337   283.96
1533.44    8.232   283.73
1543.44    8.120   283.50
1553.44    8.001   283.26
1563.44    7.875   283.01
1573.44    7.741   282.76
1583.44    7.599   282.50
1593.44    7.447   282.22
1603.44    7.286   281.93
1613.44    7.114   281.63
1623.44    6.929   281.32
1633.44    6.732   280.98
1643.44    6.520   280.63
1653.44    6.292   280.25
1663.44    6.044   279.84
1673.44    5.776   279.40
1683.44    5.481   278.91
1693.44    5.157   278.36
1703.44    4.794   277.73
1713.44    4.385   276.99
1723.44    3.912   276.08
1733.44    3.348   274.90
1743.44    2.639   273.16
1753.44    1.642   269.69
1763.44    0.215   120.42
1773.44    1.373    84.72
1783.44    1.644    78.06
1793.44    1.733    72.65
1803.44    1.757    67.56
1813.44    1.752    62.51
1823.44    1.734    57.40
1833.44    1.713    52.16
1843.44    1.694    46.80
1853.44    1.680    41.32
1863.44    1.674    35.79
1873.44    1.678    30.25
1883.44    1.692    24.76
1893.44    1.717    19.40
1903.44    1.753    14.23
1913.44    1.799     9.29
1923.44    1.855     4.62
1933.44    1.919     0.24
1943.44    1.991   356.17
1953.44    2.070   352.39
1963.44    2.155   348.90
1973.44    2.245   345.68
1983.44    2.340   342.72
1993.44    2.439   339.99
2003.44    2.540   337.48
2013.44    2.644   335.17
2023.44    2.750   333.03
2033.44    2.858   331.05
2043.44    2.968   329.21
2053.44    3.078   327.51
2063.44    3.190   325.92
2073.44    3.302   324.45
2083.44    3.414   323.07
2093.44    3.527   321.77
2103.44    3.639   320.56
2113.44    3.752   319.42
2123.44    3.864   318.35
2133.44    3.976   317.34
2143.44    4.088   316.38
2153.44    4.200   315.47
2163.44    4.311   314.61
2173.44    4.421   313.80
2183.44    4.531   313.02
2193.44    4.640   312.28
2203.44    4.748   311.57
2213.44    4.856   310.90
2223.44    4.962   310.25
2233.44    5.068   309.63
2243.44    5.173   309.04
2253.44    5.278   308.47
2263.44    5.381   307.92
2273.44    5.483   307.39
2283.44    5.585   306.89
2293.44    5.685   306.40
2303.44    5.785   305.92
2313.44    5.883   305.47
2323.44    5.981   305.02
2333.44    6.077   304.60
2343.44    6.173   304.18
2353.44    6.267   303.78
2363.44    6.361   303.39
2373.44    6.453   303.01
2383.44    6.544   302.64
2393.44    6.634   302.28
2403.44    6.723   301.93
2413.44    6.811   301.59
2423.44    6.897   301.26
2433.44    6.983   300.94
2443.44    7.067   300.62
2453.44    7.150   300.32
2463.44    7.232   300.02
2473.44    7.313   299.72
2483.44    7.393   299.43
2493.44    7.471   299.15
2503.44    7.548   298.88
2513.44    7.624   298.61
2523.44    7.699   298.34
2533.44    7.772   298.08
2543.44    7.845   297.82
2553.44    7.916   297.57
2563.44    7.985   297.33
2573.44    8.054   297.09
2583.44    8.121   296.85
2593.44    8.186   296.61
2603.44    8.251   296.38
2613.44    8.314   296.16
2623.44    8.376   295.93
2633.44    8.436   295.71
2643.44    8.495   295.50
2653.44    8.553   295.28
2663.44    8.609   295.07
2673.44    8.664   294.86
2683.44    8.718   294.66
2693.44    8.769   294.45
2703.44    8.820   294.25
2713.44    8.869   294.05
2723.44    8.917   293.86
2733.44    8.963   293.66
2743.44    9.007   293.47
2753.44    9.050   293.28
2763.44    9.092   293.09
2773.44    9.131   292.90
2783.44    9.170   292.72
2793.44    9.206   292.53
2803.44    9.241   292.35
2813.44    9.275   292.17
2823.44    9.306   291.99
2833.44    9.336   291.81
2843.44    9.364   291.63
2853.44    9.391   291.45
2863.44    9.415   291.28
2873.44    9.438   291.10
2883.44    9.459   290.93
2893.44    9.478   290.75



 

Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.


Acknowledgements
The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.


Report Information
Double Star Calculator:   Version 1.2 ($Rev: 2397 $)
Report created:   2026-06-25 18:20:21


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