Double Star Calculator - Orbit

Orbital Elements for STF1540AB
WDS: STF1540AB WDS ID/Discoverer
P: 32000.000 Orbital period (years)
a: 40.76 Semi-major axis (arcseconds)
i: 126.6 Inclination (degrees)
Ω: 164.3 Longitude of ascending node (degrees)
T: 5200.000 Epoch of periastron passage (year)
e: 0.46 Eccentricity
ω: 112.9 Longitude of periastron (degrees)
Start-Year: -13975.0 Year
End-Year: 18025.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1540AB
Position: 112645.32+030047.2 Epoch-2000 right ascension and declination
WDS-ID: 11268+0301 WDS designation
Discoverer Code: STF1540AB Discover designation and components
ADS number: 8162 Aitken Double Star catalog
HD number: 99491 HD catalog number
Hipparcos number: 55846 Hipparcos catalog number
V1: 6.55 Magnitude of the primary
V2: 7.50 Magnitude of the secondary
Equinox: 1900 Equinox
Date: 1959 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: Hop1960a Reference

Double Star Orbit for STF1540AB



WDS 6th Orbit including measures of STF1540AB

-- 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 STF1540AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50   28.550   146.63
--------------------------
-13975.00   35.018   241.48
-13875.00   35.156   240.67
-13775.00   35.296   239.88
-13675.00   35.438   239.09
-13575.00   35.582   238.30
-13475.00   35.728   237.52
-13375.00   35.876   236.75
-13275.00   36.026   235.98
-13175.00   36.177   235.23
-13075.00   36.330   234.47
-12975.00   36.484   233.73
-12875.00   36.640   232.99
-12775.00   36.797   232.25
-12675.00   36.955   231.52
-12575.00   37.115   230.80
-12475.00   37.276   230.09
-12375.00   37.437   229.38
-12275.00   37.600   228.68
-12175.00   37.763   227.98
-12075.00   37.928   227.29
-11975.00   38.093   226.60
-11875.00   38.258   225.92
-11775.00   38.425   225.25
-11675.00   38.591   224.58
-11575.00   38.758   223.92
-11475.00   38.926   223.27
-11375.00   39.093   222.62
-11275.00   39.261   221.97
-11175.00   39.428   221.33
-11075.00   39.596   220.70
-10975.00   39.764   220.07
-10875.00   39.931   219.45
-10775.00   40.098   218.83
-10675.00   40.265   218.22
-10575.00   40.431   217.61
-10475.00   40.597   217.01
-10375.00   40.763   216.41
-10275.00   40.927   215.81
-10175.00   41.091   215.23
-10075.00   41.254   214.64
-9975.00   41.416   214.06
-9875.00   41.578   213.49
-9775.00   41.738   212.92
-9675.00   41.897   212.35
-9575.00   42.055   211.79
-9475.00   42.211   211.23
-9375.00   42.367   210.68
-9275.00   42.521   210.13
-9175.00   42.673   209.59
-9075.00   42.824   209.04
-8975.00   42.973   208.51
-8875.00   43.120   207.97
-8775.00   43.266   207.44
-8675.00   43.410   206.92
-8575.00   43.552   206.39
-8475.00   43.692   205.87
-8375.00   43.829   205.36
-8275.00   43.965   204.84
-8175.00   44.098   204.33
-8075.00   44.229   203.82
-7975.00   44.358   203.32
-7875.00   44.484   202.82
-7775.00   44.607   202.32
-7675.00   44.728   201.82
-7575.00   44.847   201.33
-7475.00   44.962   200.84
-7375.00   45.075   200.35
-7275.00   45.184   199.87
-7175.00   45.291   199.38
-7075.00   45.395   198.90
-6975.00   45.495   198.42
-6875.00   45.592   197.95
-6775.00   45.686   197.47
-6675.00   45.777   197.00
-6575.00   45.864   196.53
-6475.00   45.947   196.06
-6375.00   46.027   195.59
-6275.00   46.103   195.12
-6175.00   46.175   194.66
-6075.00   46.244   194.19
-5975.00   46.308   193.73
-5875.00   46.368   193.27
-5775.00   46.424   192.81
-5675.00   46.476   192.35
-5575.00   46.524   191.90
-5475.00   46.567   191.44
-5375.00   46.606   190.98
-5275.00   46.640   190.53
-5175.00   46.670   190.07
-5075.00   46.694   189.62
-4975.00   46.714   189.17
-4875.00   46.729   188.71
-4775.00   46.739   188.26
-4675.00   46.744   187.81
-4575.00   46.743   187.35
-4475.00   46.737   186.90
-4375.00   46.726   186.45
-4275.00   46.709   185.99
-4175.00   46.686   185.54
-4075.00   46.658   185.09
-3975.00   46.624   184.63
-3875.00   46.584   184.18
-3775.00   46.537   183.72
-3675.00   46.485   183.26
-3575.00   46.426   182.80
-3475.00   46.361   182.34
-3375.00   46.289   181.88
-3275.00   46.210   181.42
-3175.00   46.125   180.96
-3075.00   46.033   180.49
-2975.00   45.934   180.02
-2875.00   45.827   179.55
-2775.00   45.713   179.08
-2675.00   45.592   178.60
-2575.00   45.463   178.13
-2475.00   45.327   177.65
-2375.00   45.182   177.16
-2275.00   45.030   176.68
-2175.00   44.869   176.19
-2075.00   44.701   175.69
-1975.00   44.523   175.20
-1875.00   44.337   174.70
-1775.00   44.143   174.19
-1675.00   43.939   173.68
-1575.00   43.726   173.17
-1475.00   43.504   172.65
-1375.00   43.273   172.12
-1275.00   43.032   171.59
-1175.00   42.781   171.05
-1075.00   42.521   170.51
-975.00   42.250   169.96
-875.00   41.969   169.40
-775.00   41.678   168.83
-675.00   41.375   168.26
-575.00   41.062   167.68
-475.00   40.738   167.08
-375.00   40.403   166.48
-275.00   40.056   165.87
-175.00   39.698   165.25
-75.00   39.328   164.62
25.00   38.946   163.97
125.00   38.552   163.31
225.00   38.145   162.64
325.00   37.726   161.95
425.00   37.294   161.25
525.00   36.850   160.53
625.00   36.392   159.79
725.00   35.921   159.03
825.00   35.437   158.26
925.00   34.939   157.46
1025.00   34.428   156.63
1125.00   33.903   155.79
1225.00   33.364   154.91
1325.00   32.811   154.01
1425.00   32.245   153.07
1525.00   31.665   152.10
1625.00   31.071   151.10
1725.00   30.463   150.05
1825.00   29.842   148.96
1925.00   29.207   147.83
2025.00   28.560   146.64
2125.00   27.900   145.40
2225.00   27.228   144.10
2325.00   26.544   142.73
2425.00   25.850   141.29
2525.00   25.146   139.77
2625.00   24.433   138.16
2725.00   23.713   136.45
2825.00   22.987   134.63
2925.00   22.257   132.70
3025.00   21.526   130.63
3125.00   20.795   128.42
3225.00   20.069   126.05
3325.00   19.350   123.50
3425.00   18.642   120.76
3525.00   17.952   117.80
3625.00   17.283   114.61
3725.00   16.642   111.17
3825.00   16.037   107.46
3925.00   15.474   103.47
4025.00   14.962    99.20
4125.00   14.509    94.64
4225.00   14.124    89.80
4325.00   13.816    84.73
4425.00   13.590    79.45
4525.00   13.453    74.03
4625.00   13.407    68.54
4725.00   13.454    63.05
4825.00   13.592    57.63
4925.00   13.815    52.36
5025.00   14.118    47.28
5125.00   14.493    42.44
5225.00   14.930    37.86
5325.00   15.420    33.56
5425.00   15.954    29.54
5525.00   16.523    25.79
5625.00   17.118    22.29
5725.00   17.732    19.03
5825.00   18.358    15.99
5925.00   18.990    13.15
6025.00   19.623    10.49
6125.00   20.253     8.00
6225.00   20.875     5.66
6325.00   21.487     3.46
6425.00   22.085     1.37
6525.00   22.668   359.40
6625.00   23.234   357.52
6725.00   23.782   355.73
6825.00   24.310   354.02
6925.00   24.818   352.38
7025.00   25.306   350.80
7125.00   25.772   349.28
7225.00   26.218   347.82
7325.00   26.642   346.40
7425.00   27.045   345.03
7525.00   27.428   343.70
7625.00   27.791   342.40
7725.00   28.134   341.13
7825.00   28.457   339.90
7925.00   28.762   338.69
8025.00   29.049   337.50
8125.00   29.317   336.34
8225.00   29.569   335.20
8325.00   29.805   334.08
8425.00   30.024   332.97
8525.00   30.229   331.88
8625.00   30.419   330.81
8725.00   30.595   329.74
8825.00   30.758   328.69
8925.00   30.908   327.65
9025.00   31.046   326.62
9125.00   31.172   325.60
9225.00   31.288   324.58
9325.00   31.393   323.58
9425.00   31.488   322.58
9525.00   31.574   321.58
9625.00   31.652   320.59
9725.00   31.721   319.61
9825.00   31.782   318.62
9925.00   31.835   317.65
10025.00   31.882   316.67
10125.00   31.922   315.70
10225.00   31.956   314.73
10325.00   31.985   313.76
10425.00   32.008   312.79
10525.00   32.027   311.83
10625.00   32.041   310.87
10725.00   32.051   309.90
10825.00   32.057   308.94
10925.00   32.060   307.98
11025.00   32.060   307.01
11125.00   32.056   306.05
11225.00   32.051   305.09
11325.00   32.043   304.12
11425.00   32.034   303.16
11525.00   32.022   302.20
11625.00   32.010   301.23
11725.00   31.996   300.26
11825.00   31.982   299.30
11925.00   31.967   298.33
12025.00   31.952   297.36
12125.00   31.936   296.39
12225.00   31.921   295.42
12325.00   31.906   294.45
12425.00   31.891   293.48
12525.00   31.877   292.50
12625.00   31.864   291.53
12725.00   31.852   290.55
12825.00   31.842   289.58
12925.00   31.832   288.60
13025.00   31.825   287.63
13125.00   31.819   286.65
13225.00   31.814   285.67
13325.00   31.812   284.69
13425.00   31.812   283.72
13525.00   31.814   282.74
13625.00   31.818   281.76
13725.00   31.825   280.78
13825.00   31.835   279.81
13925.00   31.847   278.83
14025.00   31.861   277.86
14125.00   31.879   276.88
14225.00   31.899   275.91
14325.00   31.923   274.94
14425.00   31.949   273.97
14525.00   31.979   273.00
14625.00   32.011   272.03
14725.00   32.047   271.07
14825.00   32.086   270.10
14925.00   32.128   269.14
15025.00   32.173   268.19
15125.00   32.222   267.23
15225.00   32.274   266.28
15325.00   32.330   265.33
15425.00   32.388   264.39
15525.00   32.451   263.45
15625.00   32.516   262.51
15725.00   32.585   261.57
15825.00   32.657   260.64
15925.00   32.732   259.72
16025.00   32.811   258.80
16125.00   32.893   257.88
16225.00   32.978   256.97
16325.00   33.067   256.06
16425.00   33.158   255.16
16525.00   33.253   254.26
16625.00   33.351   253.37
16725.00   33.452   252.48
16825.00   33.556   251.60
16925.00   33.663   250.72
17025.00   33.773   249.85
17125.00   33.885   248.99
17225.00   34.001   248.13
17325.00   34.119   247.28
17425.00   34.240   246.43
17525.00   34.363   245.59
17625.00   34.490   244.76
17725.00   34.618   243.93
17825.00   34.749   243.10
17925.00   34.883   242.29






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 16:38:34



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