Double Star Calculator - Orbit

Orbital Elements for STF202AB
WDS: STF202AB WDS ID/Discoverer
P: 3267.400 Orbital period (years)
a: 7.4 Semi-major axis (arcseconds)
i: 113.4 Inclination (degrees)
Ω: 3.7 Longitude of ascending node (degrees)
T: 2188.580 Epoch of periastron passage (year)
e: 0.465 Eccentricity
ω: 147.9 Longitude of periastron (degrees)
Start-Year: 391.29999999999995 Year
End-Year: 3658.7 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF202AB
Position: 020202.80+024549.4 Epoch-2000 right ascension and declination
WDS-ID: 02020+0246 WDS designation
Discoverer Code: STF202AB Discover designation and components
ADS number: 1615 Aitken Double Star catalog
HD number: 12446 HD catalog number
Hipparcos number: 9487 Hipparcos catalog number
V1: 4.10 Magnitude of the primary
V2: 5.17 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2015 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Sca2015c Reference

Double Star Orbit for STF202AB



WDS 6th Orbit including measures of STF202AB

-- 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 STF202AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.852   256.08
--------------------------
391.30    8.731    21.87
401.30    8.782    21.59
411.30    8.833    21.32
421.30    8.883    21.05
431.30    8.932    20.78
441.30    8.980    20.52
451.30    9.028    20.26
461.30    9.074    20.00
471.30    9.120    19.74
481.30    9.164    19.49
491.30    9.208    19.24
501.30    9.251    18.99
511.30    9.293    18.74
521.30    9.334    18.50
531.30    9.374    18.25
541.30    9.413    18.01
551.30    9.451    17.77
561.30    9.488    17.54
571.30    9.524    17.30
581.30    9.560    17.07
591.30    9.594    16.84
601.30    9.627    16.61
611.30    9.660    16.38
621.30    9.691    16.15
631.30    9.722    15.93
641.30    9.751    15.71
651.30    9.779    15.48
661.30    9.807    15.26
671.30    9.833    15.04
681.30    9.858    14.82
691.30    9.883    14.61
701.30    9.906    14.39
711.30    9.928    14.17
721.30    9.949    13.96
731.30    9.969    13.74
741.30    9.988    13.53
751.30   10.006    13.32
761.30   10.023    13.11
771.30   10.039    12.90
781.30   10.054    12.69
791.30   10.067    12.48
801.30   10.080    12.27
811.30   10.091    12.06
821.30   10.102    11.85
831.30   10.111    11.64
841.30   10.119    11.44
851.30   10.126    11.23
861.30   10.131    11.02
871.30   10.136    10.82
881.30   10.139    10.61
891.30   10.142    10.40
901.30   10.143    10.20
911.30   10.143     9.99
921.30   10.141     9.78
931.30   10.139     9.58
941.30   10.135     9.37
951.30   10.130     9.16
961.30   10.124     8.96
971.30   10.116     8.75
981.30   10.108     8.54
991.30   10.098     8.34
1001.30   10.086     8.13
1011.30   10.074     7.92
1021.30   10.060     7.71
1031.30   10.045     7.50
1041.30   10.029     7.29
1051.30   10.011     7.08
1061.30    9.992     6.87
1071.30    9.972     6.65
1081.30    9.950     6.44
1091.30    9.927     6.22
1101.30    9.903     6.01
1111.30    9.877     5.79
1121.30    9.850     5.57
1131.30    9.822     5.35
1141.30    9.792     5.13
1151.30    9.761     4.91
1161.30    9.728     4.69
1171.30    9.694     4.46
1181.30    9.658     4.24
1191.30    9.621     4.01
1201.30    9.583     3.78
1211.30    9.543     3.55
1221.30    9.501     3.31
1231.30    9.458     3.08
1241.30    9.414     2.84
1251.30    9.368     2.60
1261.30    9.321     2.35
1271.30    9.271     2.11
1281.30    9.221     1.86
1291.30    9.169     1.61
1301.30    9.115     1.36
1311.30    9.059     1.10
1321.30    9.002     0.84
1331.30    8.944     0.58
1341.30    8.884     0.31
1351.30    8.822     0.04
1361.30    8.758   359.76
1371.30    8.693   359.49
1381.30    8.626   359.20
1391.30    8.557   358.91
1401.30    8.487   358.62
1411.30    8.415   358.33
1421.30    8.341   358.02
1431.30    8.265   357.72
1441.30    8.188   357.40
1451.30    8.109   357.08
1461.30    8.028   356.76
1471.30    7.945   356.42
1481.30    7.861   356.08
1491.30    7.774   355.74
1501.30    7.686   355.38
1511.30    7.596   355.02
1521.30    7.504   354.65
1531.30    7.410   354.27
1541.30    7.314   353.87
1551.30    7.216   353.47
1561.30    7.117   353.06
1571.30    7.015   352.63
1581.30    6.912   352.20
1591.30    6.806   351.75
1601.30    6.699   351.28
1611.30    6.590   350.80
1621.30    6.478   350.30
1631.30    6.365   349.79
1641.30    6.250   349.26
1651.30    6.133   348.70
1661.30    6.014   348.13
1671.30    5.893   347.53
1681.30    5.770   346.90
1691.30    5.646   346.25
1701.30    5.519   345.57
1711.30    5.391   344.86
1721.30    5.261   344.11
1731.30    5.129   343.33
1741.30    4.996   342.50
1751.30    4.860   341.62
1761.30    4.724   340.70
1771.30    4.586   339.72
1781.30    4.446   338.68
1791.30    4.306   337.57
1801.30    4.164   336.39
1811.30    4.021   335.12
1821.30    3.878   333.76
1831.30    3.734   332.30
1841.30    3.590   330.72
1851.30    3.447   329.00
1861.30    3.304   327.14
1871.30    3.161   325.11
1881.30    3.021   322.88
1891.30    2.882   320.45
1901.30    2.747   317.77
1911.30    2.616   314.82
1921.30    2.489   311.56
1931.30    2.369   307.96
1941.30    2.256   303.98
1951.30    2.153   299.61
1961.30    2.061   294.83
1971.30    1.982   289.63
1981.30    1.917   284.04
1991.30    1.870   278.11
2001.30    1.841   271.94
2011.30    1.831   265.63
2021.30    1.840   259.32
2031.30    1.868   253.14
2041.30    1.914   247.20
2051.30    1.977   241.58
2061.30    2.053   236.35
2071.30    2.141   231.52
2081.30    2.239   227.09
2091.30    2.345   223.05
2101.30    2.457   219.37
2111.30    2.572   216.01
2121.30    2.690   212.95
2131.30    2.809   210.14
2141.30    2.928   207.56
2151.30    3.046   205.18
2161.30    3.161   202.98
2171.30    3.273   200.93
2181.30    3.381   199.01
2191.30    3.484   197.21
2201.30    3.582   195.51
2211.30    3.675   193.90
2221.30    3.761   192.37
2231.30    3.841   190.90
2241.30    3.915   189.49
2251.30    3.982   188.13
2261.30    4.042   186.81
2271.30    4.095   185.53
2281.30    4.142   184.28
2291.30    4.181   183.05
2301.30    4.214   181.85
2311.30    4.240   180.66
2321.30    4.260   179.49
2331.30    4.274   178.32
2341.30    4.282   177.16
2351.30    4.284   176.01
2361.30    4.281   174.85
2371.30    4.273   173.69
2381.30    4.260   172.53
2391.30    4.242   171.35
2401.30    4.221   170.17
2411.30    4.195   168.97
2421.30    4.166   167.76
2431.30    4.133   166.53
2441.30    4.098   165.27
2451.30    4.059   164.00
2461.30    4.019   162.70
2471.30    3.976   161.37
2481.30    3.931   160.01
2491.30    3.885   158.62
2501.30    3.838   157.20
2511.30    3.789   155.74
2521.30    3.740   154.25
2531.30    3.690   152.71
2541.30    3.641   151.13
2551.30    3.591   149.51
2561.30    3.541   147.84
2571.30    3.492   146.12
2581.30    3.444   144.36
2591.30    3.397   142.55
2601.30    3.352   140.68
2611.30    3.308   138.77
2621.30    3.265   136.81
2631.30    3.225   134.79
2641.30    3.187   132.73
2651.30    3.152   130.62
2661.30    3.120   128.46
2671.30    3.090   126.26
2681.30    3.064   124.02
2691.30    3.040   121.74
2701.30    3.021   119.43
2711.30    3.005   117.09
2721.30    2.993   114.73
2731.30    2.984   112.36
2741.30    2.980   109.97
2751.30    2.979   107.58
2761.30    2.983   105.19
2771.30    2.991   102.81
2781.30    3.003   100.45
2791.30    3.018    98.11
2801.30    3.038    95.80
2811.30    3.061    93.51
2821.30    3.089    91.27
2831.30    3.120    89.07
2841.30    3.154    86.91
2851.30    3.192    84.81
2861.30    3.233    82.75
2871.30    3.278    80.75
2881.30    3.325    78.80
2891.30    3.375    76.91
2901.30    3.428    75.08
2911.30    3.483    73.30
2921.30    3.541    71.58
2931.30    3.600    69.92
2941.30    3.662    68.31
2951.30    3.726    66.75
2961.30    3.791    65.25
2971.30    3.858    63.80
2981.30    3.927    62.40
2991.30    3.997    61.05
3001.30    4.068    59.74
3011.30    4.140    58.48
3021.30    4.213    57.27
3031.30    4.288    56.09
3041.30    4.363    54.96
3051.30    4.439    53.86
3061.30    4.515    52.80
3071.30    4.592    51.78
3081.30    4.670    50.79
3091.30    4.748    49.84
3101.30    4.826    48.91
3111.30    4.905    48.01
3121.30    4.984    47.15
3131.30    5.063    46.30
3141.30    5.143    45.49
3151.30    5.222    44.70
3161.30    5.301    43.93
3171.30    5.381    43.19
3181.30    5.460    42.47
3191.30    5.540    41.77
3201.30    5.619    41.09
3211.30    5.698    40.42
3221.30    5.777    39.78
3231.30    5.856    39.15
3241.30    5.934    38.54
3251.30    6.012    37.95
3261.30    6.090    37.37
3271.30    6.167    36.80
3281.30    6.245    36.25
3291.30    6.321    35.71
3301.30    6.398    35.19
3311.30    6.474    34.68
3321.30    6.549    34.18
3331.30    6.624    33.69
3341.30    6.699    33.21
3351.30    6.773    32.74
3361.30    6.846    32.28
3371.30    6.919    31.84
3381.30    6.991    31.40
3391.30    7.063    30.97
3401.30    7.134    30.55
3411.30    7.205    30.13
3421.30    7.275    29.73
3431.30    7.345    29.33
3441.30    7.413    28.94
3451.30    7.481    28.56
3461.30    7.549    28.19
3471.30    7.616    27.82
3481.30    7.682    27.45
3491.30    7.747    27.10
3501.30    7.812    26.75
3511.30    7.876    26.40
3521.30    7.939    26.06
3531.30    8.002    25.73
3541.30    8.064    25.40
3551.30    8.125    25.08
3561.30    8.185    24.76
3571.30    8.244    24.44
3581.30    8.303    24.13
3591.30    8.361    23.83
3601.30    8.418    23.53
3611.30    8.475    23.23
3621.30    8.530    22.94
3631.30    8.585    22.65
3641.30    8.639    22.36
3651.30    8.692    22.08






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 14:56:09



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