Double Star Calculator - Orbit

Orbital Elements for STF1769AB
WDS: STF1769AB WDS ID/Discoverer
P: 2616.357 Orbital period (years)
a: 4.97148 Semi-major axis (arcseconds)
i: 75.356 Inclination (degrees)
Ω: 173.088 Longitude of ascending node (degrees)
T: 2327.790 Epoch of periastron passage (year)
e: 0.79906 Eccentricity
ω: 40.904 Longitude of periastron (degrees)
Start-Year: 716.8217 Year
End-Year: 3333.1783 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1769AB
Position: 133801.95+391041.0 Epoch-2000 right ascension and declination
WDS-ID: 13381+3910 WDS designation
Discoverer Code: STF1769AB Discover designation and components
ADS number: 8981 Aitken Double Star catalog
HD number: 118742 HD catalog number
Hipparcos number: 66514 Hipparcos catalog number
V1: 7.91 Magnitude of the primary
V2: 10.42 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF1769AB



WDS 6th Orbit including measures of STF1769AB

-- 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 STF1769AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.468    47.09
--------------------------
716.82    7.325     2.40
726.82    7.322     2.50
736.82    7.319     2.59
746.82    7.315     2.69
756.82    7.310     2.79
766.82    7.304     2.88
776.82    7.298     2.98
786.82    7.291     3.08
796.82    7.283     3.18
806.82    7.274     3.27
816.82    7.264     3.37
826.82    7.254     3.47
836.82    7.243     3.57
846.82    7.232     3.67
856.82    7.219     3.76
866.82    7.206     3.86
876.82    7.193     3.96
886.82    7.178     4.06
896.82    7.163     4.16
906.82    7.147     4.27
916.82    7.130     4.37
926.82    7.113     4.47
936.82    7.095     4.57
946.82    7.076     4.67
956.82    7.057     4.78
966.82    7.037     4.88
976.82    7.016     4.99
986.82    6.995     5.09
996.82    6.973     5.20
1006.82    6.950     5.30
1016.82    6.927     5.41
1026.82    6.903     5.52
1036.82    6.878     5.63
1046.82    6.853     5.74
1056.82    6.827     5.85
1066.82    6.800     5.96
1076.82    6.773     6.07
1086.82    6.745     6.19
1096.82    6.716     6.30
1106.82    6.687     6.42
1116.82    6.657     6.53
1126.82    6.627     6.65
1136.82    6.595     6.77
1146.82    6.564     6.89
1156.82    6.531     7.01
1166.82    6.498     7.13
1176.82    6.464     7.25
1186.82    6.430     7.38
1196.82    6.395     7.50
1206.82    6.360     7.63
1216.82    6.323     7.76
1226.82    6.287     7.89
1236.82    6.249     8.02
1246.82    6.211     8.15
1256.82    6.172     8.29
1266.82    6.133     8.42
1276.82    6.093     8.56
1286.82    6.053     8.70
1296.82    6.011     8.84
1306.82    5.970     8.99
1316.82    5.927     9.13
1326.82    5.884     9.28
1336.82    5.841     9.43
1346.82    5.796     9.59
1356.82    5.751     9.74
1366.82    5.706     9.90
1376.82    5.660    10.06
1386.82    5.613    10.22
1396.82    5.566    10.39
1406.82    5.518    10.55
1416.82    5.470    10.73
1426.82    5.420    10.90
1436.82    5.371    11.08
1446.82    5.320    11.26
1456.82    5.269    11.44
1466.82    5.218    11.63
1476.82    5.166    11.82
1486.82    5.113    12.02
1496.82    5.059    12.22
1506.82    5.005    12.42
1516.82    4.951    12.63
1526.82    4.896    12.84
1536.82    4.840    13.06
1546.82    4.783    13.29
1556.82    4.726    13.51
1566.82    4.669    13.75
1576.82    4.610    13.99
1586.82    4.552    14.24
1596.82    4.492    14.49
1606.82    4.432    14.75
1616.82    4.371    15.01
1626.82    4.310    15.29
1636.82    4.248    15.57
1646.82    4.186    15.86
1656.82    4.123    16.16
1666.82    4.059    16.47
1676.82    3.995    16.79
1686.82    3.930    17.12
1696.82    3.865    17.46
1706.82    3.799    17.81
1716.82    3.732    18.18
1726.82    3.665    18.55
1736.82    3.597    18.95
1746.82    3.529    19.35
1756.82    3.460    19.78
1766.82    3.390    20.22
1776.82    3.320    20.68
1786.82    3.250    21.16
1796.82    3.179    21.66
1806.82    3.107    22.18
1816.82    3.035    22.73
1826.82    2.963    23.30
1836.82    2.890    23.91
1846.82    2.816    24.54
1856.82    2.742    25.21
1866.82    2.668    25.92
1876.82    2.593    26.66
1886.82    2.518    27.46
1896.82    2.442    28.30
1906.82    2.367    29.19
1916.82    2.291    30.14
1926.82    2.215    31.16
1936.82    2.139    32.25
1946.82    2.062    33.43
1956.82    1.986    34.69
1966.82    1.910    36.05
1976.82    1.834    37.53
1986.82    1.759    39.13
1996.82    1.684    40.87
2006.82    1.610    42.78
2016.82    1.537    44.87
2026.82    1.466    47.16
2036.82    1.396    49.69
2046.82    1.328    52.48
2056.82    1.262    55.56
2066.82    1.200    58.98
2076.82    1.141    62.76
2086.82    1.087    66.93
2096.82    1.038    71.51
2106.82    0.995    76.52
2116.82    0.959    81.95
2126.82    0.931    87.74
2136.82    0.912    93.83
2146.82    0.902   100.12
2156.82    0.902   106.48
2166.82    0.911   112.78
2176.82    0.928   118.91
2186.82    0.954   124.75
2196.82    0.986   130.25
2206.82    1.023   135.39
2216.82    1.063   140.14
2226.82    1.105   144.54
2236.82    1.147   148.62
2246.82    1.186   152.41
2256.82    1.219   155.98
2266.82    1.243   159.39
2276.82    1.252   162.71
2286.82    1.239   166.03
2296.82    1.197   169.50
2306.82    1.114   173.35
2316.82    0.980   178.04
2326.82    0.793   184.63
2336.82    0.569   196.01
2346.82    0.359   221.93
2356.82    0.311   275.13
2366.82    0.489   311.22
2376.82    0.736   325.68
2386.82    0.990   332.77
2396.82    1.237   336.98
2406.82    1.475   339.81
2416.82    1.701   341.87
2426.82    1.915   343.46
2436.82    2.120   344.73
2446.82    2.315   345.78
2456.82    2.501   346.67
2466.82    2.679   347.44
2476.82    2.848   348.12
2486.82    3.011   348.72
2496.82    3.168   349.27
2506.82    3.318   349.76
2516.82    3.462   350.21
2526.82    3.601   350.62
2536.82    3.735   351.01
2546.82    3.864   351.36
2556.82    3.988   351.70
2566.82    4.108   352.02
2576.82    4.224   352.31
2586.82    4.337   352.60
2596.82    4.445   352.86
2606.82    4.551   353.12
2616.82    4.652   353.36
2626.82    4.751   353.60
2636.82    4.847   353.82
2646.82    4.939   354.04
2656.82    5.029   354.25
2666.82    5.116   354.45
2676.82    5.201   354.64
2686.82    5.283   354.83
2696.82    5.362   355.01
2706.82    5.439   355.19
2716.82    5.514   355.36
2726.82    5.587   355.53
2736.82    5.658   355.69
2746.82    5.726   355.85
2756.82    5.793   356.01
2766.82    5.857   356.16
2776.82    5.920   356.31
2786.82    5.981   356.46
2796.82    6.040   356.60
2806.82    6.097   356.74
2816.82    6.152   356.88
2826.82    6.206   357.01
2836.82    6.258   357.14
2846.82    6.309   357.28
2856.82    6.358   357.40
2866.82    6.406   357.53
2876.82    6.452   357.66
2886.82    6.496   357.78
2896.82    6.539   357.90
2906.82    6.581   358.02
2916.82    6.622   358.14
2926.82    6.661   358.26
2936.82    6.698   358.37
2946.82    6.735   358.49
2956.82    6.770   358.60
2966.82    6.804   358.71
2976.82    6.836   358.82
2986.82    6.868   358.93
2996.82    6.898   359.04
3006.82    6.927   359.15
3016.82    6.955   359.26
3026.82    6.982   359.37
3036.82    7.008   359.47
3046.82    7.032   359.58
3056.82    7.056   359.68
3066.82    7.078   359.78
3076.82    7.099   359.89
3086.82    7.120   359.99
3096.82    7.139     0.09
3106.82    7.157     0.19
3116.82    7.175     0.29
3126.82    7.191     0.39
3136.82    7.206     0.49
3146.82    7.221     0.59
3156.82    7.234     0.69
3166.82    7.247     0.79
3176.82    7.258     0.89
3186.82    7.269     0.99
3196.82    7.278     1.08
3206.82    7.287     1.18
3216.82    7.295     1.28
3226.82    7.302     1.38
3236.82    7.308     1.47
3246.82    7.314     1.57
3256.82    7.318     1.67
3266.82    7.322     1.76
3276.82    7.325     1.86
3286.82    7.327     1.95
3296.82    7.328     2.05
3306.82    7.328     2.15
3316.82    7.328     2.24
3326.82    7.326     2.34






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 16:58:27



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