Double Star Calculator - Orbit

Orbital Elements for STF2658AB
WDS: STF2658AB WDS ID/Discoverer
P: 5631.853 Orbital period (years)
a: 19.14603 Semi-major axis (arcseconds)
i: 102.938 Inclination (degrees)
Ω: 44.121 Longitude of ascending node (degrees)
T: 2806.193 Epoch of periastron passage (year)
e: 0.83512 Eccentricity
ω: 67.495 Longitude of periastron (degrees)
Start-Year: -790.9267 Year
End-Year: 4840.9267 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2658AB
Position: 201340.74+530730.3 Epoch-2000 right ascension and declination
WDS-ID: 20136+5307 WDS designation
Discoverer Code: STF2658AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 192679 HD catalog number
Hipparcos number: 99680 Hipparcos catalog number
V1: 7.19 Magnitude of the primary
V2: 9.38 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 STF2658AB



WDS 6th Orbit including measures of STF2658AB

-- 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 STF2658AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    5.376   105.21
--------------------------
-790.93   18.285   203.65
-780.93   18.260   203.57
-770.93   18.234   203.48
-760.93   18.208   203.39
-750.93   18.181   203.31
-740.93   18.154   203.22
-730.93   18.126   203.13
-720.93   18.098   203.04
-710.93   18.070   202.95
-700.93   18.042   202.87
-690.93   18.013   202.78
-680.93   17.983   202.69
-670.93   17.954   202.60
-660.93   17.923   202.51
-650.93   17.893   202.42
-640.93   17.862   202.33
-630.93   17.831   202.24
-620.93   17.800   202.15
-610.93   17.768   202.06
-600.93   17.736   201.96
-590.93   17.703   201.87
-580.93   17.670   201.78
-570.93   17.637   201.69
-560.93   17.603   201.59
-550.93   17.570   201.50
-540.93   17.535   201.41
-530.93   17.501   201.31
-520.93   17.466   201.22
-510.93   17.431   201.12
-500.93   17.395   201.03
-490.93   17.359   200.93
-480.93   17.323   200.84
-470.93   17.287   200.74
-460.93   17.250   200.64
-450.93   17.213   200.55
-440.93   17.175   200.45
-430.93   17.137   200.35
-420.93   17.099   200.25
-410.93   17.061   200.15
-400.93   17.022   200.05
-390.93   16.983   199.95
-380.93   16.944   199.85
-370.93   16.904   199.75
-360.93   16.864   199.65
-350.93   16.824   199.55
-340.93   16.784   199.45
-330.93   16.743   199.35
-320.93   16.702   199.24
-310.93   16.660   199.14
-300.93   16.619   199.03
-290.93   16.577   198.93
-280.93   16.534   198.82
-270.93   16.492   198.72
-260.93   16.449   198.61
-250.93   16.406   198.51
-240.93   16.363   198.40
-230.93   16.319   198.29
-220.93   16.275   198.18
-210.93   16.231   198.07
-200.93   16.186   197.96
-190.93   16.142   197.85
-180.93   16.097   197.74
-170.93   16.051   197.63
-160.93   16.006   197.52
-150.93   15.960   197.40
-140.93   15.914   197.29
-130.93   15.868   197.18
-120.93   15.821   197.06
-110.93   15.774   196.94
-100.93   15.727   196.83
-90.93   15.680   196.71
-80.93   15.632   196.59
-70.93   15.585   196.48
-60.93   15.537   196.36
-50.93   15.488   196.24
-40.93   15.440   196.12
-30.93   15.391   195.99
-20.93   15.342   195.87
-10.93   15.293   195.75
-0.93   15.243   195.63
9.07   15.193   195.50
19.07   15.143   195.38
29.07   15.093   195.25
39.07   15.043   195.12
49.07   14.992   194.99
59.07   14.941   194.86
69.07   14.890   194.74
79.07   14.838   194.60
89.07   14.787   194.47
99.07   14.735   194.34
109.07   14.683   194.21
119.07   14.631   194.07
129.07   14.578   193.94
139.07   14.526   193.80
149.07   14.473   193.66
159.07   14.420   193.53
169.07   14.367   193.39
179.07   14.313   193.25
189.07   14.259   193.10
199.07   14.205   192.96
209.07   14.151   192.82
219.07   14.097   192.67
229.07   14.043   192.53
239.07   13.988   192.38
249.07   13.933   192.23
259.07   13.878   192.08
269.07   13.823   191.93
279.07   13.767   191.78
289.07   13.711   191.63
299.07   13.656   191.47
309.07   13.600   191.32
319.07   13.543   191.16
329.07   13.487   191.00
339.07   13.431   190.85
349.07   13.374   190.68
359.07   13.317   190.52
369.07   13.260   190.36
379.07   13.203   190.19
389.07   13.145   190.03
399.07   13.088   189.86
409.07   13.030   189.69
419.07   12.972   189.52
429.07   12.914   189.35
439.07   12.856   189.17
449.07   12.798   189.00
459.07   12.739   188.82
469.07   12.680   188.64
479.07   12.622   188.46
489.07   12.563   188.28
499.07   12.504   188.10
509.07   12.444   187.91
519.07   12.385   187.72
529.07   12.326   187.54
539.07   12.266   187.34
549.07   12.206   187.15
559.07   12.146   186.96
569.07   12.086   186.76
579.07   12.026   186.56
589.07   11.966   186.36
599.07   11.906   186.16
609.07   11.845   185.95
619.07   11.784   185.75
629.07   11.724   185.54
639.07   11.663   185.33
649.07   11.602   185.11
659.07   11.541   184.90
669.07   11.480   184.68
679.07   11.419   184.46
689.07   11.358   184.24
699.07   11.296   184.01
709.07   11.235   183.79
719.07   11.173   183.56
729.07   11.112   183.32
739.07   11.050   183.09
749.07   10.988   182.85
759.07   10.926   182.61
769.07   10.864   182.37
779.07   10.803   182.12
789.07   10.741   181.87
799.07   10.679   181.62
809.07   10.616   181.37
819.07   10.554   181.11
829.07   10.492   180.85
839.07   10.430   180.59
849.07   10.368   180.32
859.07   10.305   180.05
869.07   10.243   179.77
879.07   10.181   179.50
889.07   10.119   179.22
899.07   10.056   178.93
909.07    9.994   178.65
919.07    9.932   178.36
929.07    9.869   178.06
939.07    9.807   177.76
949.07    9.745   177.46
959.07    9.682   177.16
969.07    9.620   176.85
979.07    9.558   176.53
989.07    9.496   176.21
999.07    9.434   175.89
1009.07    9.372   175.57
1019.07    9.310   175.23
1029.07    9.248   174.90
1039.07    9.186   174.56
1049.07    9.124   174.22
1059.07    9.062   173.87
1069.07    9.001   173.51
1079.07    8.939   173.15
1089.07    8.878   172.79
1099.07    8.816   172.42
1109.07    8.755   172.05
1119.07    8.694   171.67
1129.07    8.633   171.28
1139.07    8.572   170.89
1149.07    8.512   170.50
1159.07    8.451   170.10
1169.07    8.391   169.69
1179.07    8.331   169.28
1189.07    8.271   168.86
1199.07    8.211   168.43
1209.07    8.152   168.00
1219.07    8.093   167.57
1229.07    8.034   167.12
1239.07    7.975   166.67
1249.07    7.916   166.21
1259.07    7.858   165.75
1269.07    7.800   165.28
1279.07    7.742   164.80
1289.07    7.685   164.32
1299.07    7.627   163.82
1309.07    7.571   163.32
1319.07    7.514   162.82
1329.07    7.458   162.30
1339.07    7.402   161.78
1349.07    7.347   161.25
1359.07    7.292   160.71
1369.07    7.237   160.16
1379.07    7.183   159.61
1389.07    7.129   159.04
1399.07    7.076   158.47
1409.07    7.023   157.89
1419.07    6.971   157.30
1429.07    6.919   156.70
1439.07    6.867   156.10
1449.07    6.816   155.48
1459.07    6.766   154.85
1469.07    6.716   154.22
1479.07    6.667   153.57
1489.07    6.619   152.92
1499.07    6.571   152.26
1509.07    6.523   151.58
1519.07    6.477   150.90
1529.07    6.431   150.21
1539.07    6.385   149.51
1549.07    6.341   148.79
1559.07    6.297   148.07
1569.07    6.254   147.34
1579.07    6.211   146.59
1589.07    6.170   145.84
1599.07    6.129   145.08
1609.07    6.089   144.30
1619.07    6.050   143.52
1629.07    6.011   142.73
1639.07    5.974   141.92
1649.07    5.938   141.11
1659.07    5.902   140.29
1669.07    5.868   139.45
1679.07    5.834   138.61
1689.07    5.801   137.76
1699.07    5.770   136.90
1709.07    5.739   136.02
1719.07    5.710   135.14
1729.07    5.681   134.25
1739.07    5.654   133.35
1749.07    5.627   132.45
1759.07    5.602   131.53
1769.07    5.578   130.61
1779.07    5.555   129.68
1789.07    5.533   128.74
1799.07    5.513   127.79
1809.07    5.493   126.84
1819.07    5.475   125.88
1829.07    5.458   124.91
1839.07    5.442   123.94
1849.07    5.428   122.97
1859.07    5.415   121.98
1869.07    5.402   121.00
1879.07    5.392   120.01
1889.07    5.382   119.01
1899.07    5.374   118.01
1909.07    5.367   117.01
1919.07    5.361   116.01
1929.07    5.356   115.00
1939.07    5.353   114.00
1949.07    5.351   112.99
1959.07    5.350   111.98
1969.07    5.350   110.97
1979.07    5.352   109.97
1989.07    5.355   108.96
1999.07    5.359   107.95
2009.07    5.364   106.95
2019.07    5.370   105.95
2029.07    5.378   104.95
2039.07    5.387   103.95
2049.07    5.396   102.96
2059.07    5.407   101.97
2069.07    5.419   100.99
2079.07    5.432   100.01
2089.07    5.446    99.03
2099.07    5.461    98.06
2109.07    5.477    97.10
2119.07    5.494    96.14
2129.07    5.512    95.18
2139.07    5.530    94.24
2149.07    5.550    93.30
2159.07    5.570    92.36
2169.07    5.591    91.44
2179.07    5.613    90.52
2189.07    5.635    89.60
2199.07    5.658    88.70
2209.07    5.682    87.80
2219.07    5.706    86.91
2229.07    5.731    86.03
2239.07    5.756    85.15
2249.07    5.781    84.29
2259.07    5.807    83.43
2269.07    5.833    82.57
2279.07    5.859    81.73
2289.07    5.885    80.89
2299.07    5.912    80.06
2309.07    5.938    79.24
2319.07    5.965    78.43
2329.07    5.991    77.62
2339.07    6.017    76.82
2349.07    6.043    76.02
2359.07    6.068    75.24
2369.07    6.093    74.46
2379.07    6.118    73.68
2389.07    6.141    72.92
2399.07    6.164    72.15
2409.07    6.186    71.40
2419.07    6.208    70.64
2429.07    6.228    69.90
2439.07    6.247    69.16
2449.07    6.264    68.42
2459.07    6.280    67.69
2469.07    6.294    66.96
2479.07    6.306    66.23
2489.07    6.316    65.50
2499.07    6.324    64.78
2509.07    6.330    64.06
2519.07    6.332    63.34
2529.07    6.332    62.62
2539.07    6.328    61.90
2549.07    6.320    61.18
2559.07    6.308    60.46
2569.07    6.292    59.73
2579.07    6.270    59.00
2589.07    6.243    58.26
2599.07    6.210    57.52
2609.07    6.170    56.76
2619.07    6.122    56.00
2629.07    6.066    55.22
2639.07    6.000    54.43
2649.07    5.924    53.62
2659.07    5.835    52.78
2669.07    5.733    51.92
2679.07    5.615    51.02
2689.07    5.479    50.09
2699.07    5.323    49.10
2709.07    5.142    48.05
2719.07    4.935    46.91
2729.07    4.696    45.67
2739.07    4.421    44.28
2749.07    4.104    42.69
2759.07    3.740    40.81
2769.07    3.324    38.50
2779.07    2.853    35.46
2789.07    2.332    31.14
2799.07    1.774    24.18
2809.07    1.218    10.76
2819.07    0.792   339.47
2829.07    0.821   289.05
2839.07    1.275   260.41
2849.07    1.846   248.08
2859.07    2.431   241.66
2869.07    3.003   237.71
2879.07    3.551   235.01
2889.07    4.074   233.01
2899.07    4.570   231.46
2909.07    5.040   230.21
2919.07    5.487   229.17
2929.07    5.912   228.28
2939.07    6.317   227.51
2949.07    6.703   226.83
2959.07    7.071   226.22
2969.07    7.423   225.67
2979.07    7.760   225.17
2989.07    8.083   224.71
2999.07    8.394   224.28
3009.07    8.692   223.89
3019.07    8.980   223.52
3029.07    9.256   223.17
3039.07    9.523   222.84
3049.07    9.781   222.53
3059.07   10.031   222.24
3069.07   10.272   221.96
3079.07   10.505   221.69
3089.07   10.731   221.44
3099.07   10.950   221.19
3109.07   11.162   220.95
3119.07   11.368   220.73
3129.07   11.569   220.51
3139.07   11.763   220.30
3149.07   11.952   220.09
3159.07   12.136   219.89
3169.07   12.315   219.70
3179.07   12.489   219.51
3189.07   12.659   219.33
3199.07   12.824   219.15
3209.07   12.985   218.98
3219.07   13.142   218.81
3229.07   13.295   218.64
3239.07   13.444   218.48
3249.07   13.589   218.32
3259.07   13.731   218.17
3269.07   13.870   218.02
3279.07   14.005   217.87
3289.07   14.137   217.72
3299.07   14.266   217.58
3309.07   14.392   217.44
3319.07   14.515   217.30
3329.07   14.635   217.17
3339.07   14.753   217.03
3349.07   14.867   216.90
3359.07   14.980   216.77
3369.07   15.089   216.64
3379.07   15.197   216.52
3389.07   15.302   216.39
3399.07   15.404   216.27
3409.07   15.504   216.15
3419.07   15.602   216.03
3429.07   15.698   215.91
3439.07   15.792   215.80
3449.07   15.884   215.68
3459.07   15.974   215.57
3469.07   16.061   215.45
3479.07   16.147   215.34
3489.07   16.231   215.23
3499.07   16.313   215.12
3509.07   16.394   215.02
3519.07   16.472   214.91
3529.07   16.549   214.80
3539.07   16.624   214.70
3549.07   16.698   214.60
3559.07   16.770   214.49
3569.07   16.840   214.39
3579.07   16.909   214.29
3589.07   16.976   214.19
3599.07   17.042   214.09
3609.07   17.106   213.99
3619.07   17.169   213.89
3629.07   17.230   213.79
3639.07   17.290   213.70
3649.07   17.349   213.60
3659.07   17.406   213.50
3669.07   17.462   213.41
3679.07   17.517   213.32
3689.07   17.570   213.22
3699.07   17.622   213.13
3709.07   17.673   213.04
3719.07   17.723   212.94
3729.07   17.771   212.85
3739.07   17.819   212.76
3749.07   17.865   212.67
3759.07   17.910   212.58
3769.07   17.954   212.49
3779.07   17.996   212.40
3789.07   18.038   212.31
3799.07   18.079   212.22
3809.07   18.118   212.14
3819.07   18.157   212.05
3829.07   18.194   211.96
3839.07   18.231   211.87
3849.07   18.266   211.79
3859.07   18.301   211.70
3869.07   18.334   211.61
3879.07   18.367   211.53
3889.07   18.398   211.44
3899.07   18.429   211.36
3909.07   18.459   211.27
3919.07   18.488   211.19
3929.07   18.516   211.10
3939.07   18.543   211.02
3949.07   18.569   210.94
3959.07   18.594   210.85
3969.07   18.619   210.77
3979.07   18.642   210.69
3989.07   18.665   210.60
3999.07   18.687   210.52
4009.07   18.708   210.44
4019.07   18.728   210.36
4029.07   18.748   210.27
4039.07   18.767   210.19
4049.07   18.785   210.11
4059.07   18.802   210.03
4069.07   18.818   209.95
4079.07   18.834   209.87
4089.07   18.849   209.78
4099.07   18.863   209.70
4109.07   18.877   209.62
4119.07   18.889   209.54
4129.07   18.901   209.46
4139.07   18.913   209.38
4149.07   18.923   209.30
4159.07   18.933   209.22
4169.07   18.943   209.14
4179.07   18.951   209.06
4189.07   18.959   208.98
4199.07   18.966   208.90
4209.07   18.973   208.82
4219.07   18.979   208.74
4229.07   18.984   208.66
4239.07   18.989   208.58
4249.07   18.993   208.50
4259.07   18.996   208.42
4269.07   18.999   208.34
4279.07   19.001   208.26
4289.07   19.003   208.18
4299.07   19.004   208.10
4309.07   19.004   208.02
4319.07   19.004   207.94
4329.07   19.003   207.86
4339.07   19.002   207.78
4349.07   19.000   207.70
4359.07   18.998   207.62
4369.07   18.994   207.54
4379.07   18.991   207.46
4389.07   18.987   207.38
4399.07   18.982   207.30
4409.07   18.977   207.22
4419.07   18.971   207.14
4429.07   18.964   207.06
4439.07   18.958   206.98
4449.07   18.950   206.90
4459.07   18.942   206.82
4469.07   18.934   206.73
4479.07   18.925   206.65
4489.07   18.915   206.57
4499.07   18.905   206.49
4509.07   18.895   206.41
4519.07   18.884   206.33
4529.07   18.872   206.25
4539.07   18.860   206.17
4549.07   18.848   206.09
4559.07   18.835   206.01
4569.07   18.821   205.93
4579.07   18.807   205.84
4589.07   18.793   205.76
4599.07   18.778   205.68
4609.07   18.763   205.60
4619.07   18.747   205.52
4629.07   18.731   205.43
4639.07   18.714   205.35
4649.07   18.697   205.27
4659.07   18.680   205.19
4669.07   18.662   205.10
4679.07   18.643   205.02
4689.07   18.624   204.94
4699.07   18.605   204.85
4709.07   18.585   204.77
4719.07   18.565   204.69
4729.07   18.544   204.60
4739.07   18.523   204.52
4749.07   18.502   204.44
4759.07   18.480   204.35
4769.07   18.458   204.27
4779.07   18.435   204.18
4789.07   18.412   204.10
4799.07   18.388   204.01
4809.07   18.364   203.93
4819.07   18.340   203.84
4829.07   18.315   203.75
4839.07   18.290   203.67






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 18:12:50



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