Double Star Calculator - Orbit

Orbital Elements for STF1321AB
WDS: STF1321AB WDS ID/Discoverer
P: 1986.300 Orbital period (years)
a: 25.77 Semi-major axis (arcseconds)
i: 38.3 Inclination (degrees)
Ω: 48.7 Longitude of ascending node (degrees)
T: 1937.200 Epoch of periastron passage (year)
e: 0.241 Eccentricity
ω: 32.1 Longitude of periastron (degrees)
Start-Year: 1031.85 Year
End-Year: 3018.15 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1321AB
Position: 091422.79+524111.8 Epoch-2000 right ascension and declination
WDS-ID: 09144+5241 WDS designation
Discoverer Code: STF1321AB Discover designation and components
ADS number: 7251 Aitken Double Star catalog
HD number: 79210 HD catalog number
Hipparcos number: 45343 Hipparcos catalog number
V1: 7.79 Magnitude of the primary
V2: 7.88 Magnitude of the secondary
Equinox: Equinox
Date: 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: PkO2020 Reference

Double Star Orbit for STF1321AB



WDS 6th Orbit including measures of STF1321AB

-- 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 STF1321AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50   16.928   101.24
--------------------------
1031.85   28.941   264.10
1041.85   28.771   265.20
1051.85   28.598   266.31
1061.85   28.420   267.44
1071.85   28.237   268.58
1081.85   28.051   269.74
1091.85   27.862   270.91
1101.85   27.668   272.10
1111.85   27.472   273.31
1121.85   27.273   274.53
1131.85   27.072   275.77
1141.85   26.868   277.03
1151.85   26.662   278.31
1161.85   26.454   279.61
1171.85   26.246   280.93
1181.85   26.036   282.28
1191.85   25.825   283.64
1201.85   25.615   285.02
1211.85   25.404   286.43
1221.85   25.193   287.87
1231.85   24.984   289.32
1241.85   24.775   290.80
1251.85   24.568   292.31
1261.85   24.362   293.84
1271.85   24.159   295.40
1281.85   23.959   296.98
1291.85   23.761   298.59
1301.85   23.567   300.23
1311.85   23.376   301.89
1321.85   23.190   303.59
1331.85   23.008   305.30
1341.85   22.831   307.05
1351.85   22.659   308.82
1361.85   22.493   310.62
1371.85   22.333   312.44
1381.85   22.179   314.30
1391.85   22.032   316.17
1401.85   21.891   318.07
1411.85   21.758   320.00
1421.85   21.632   321.94
1431.85   21.514   323.91
1441.85   21.403   325.91
1451.85   21.300   327.92
1461.85   21.206   329.95
1471.85   21.119   331.99
1481.85   21.040   334.06
1491.85   20.969   336.13
1501.85   20.906   338.23
1511.85   20.851   340.33
1521.85   20.804   342.44
1531.85   20.764   344.56
1541.85   20.731   346.69
1551.85   20.705   348.83
1561.85   20.685   350.97
1571.85   20.671   353.12
1581.85   20.662   355.26
1591.85   20.659   357.41
1601.85   20.659   359.56
1611.85   20.663     1.70
1621.85   20.670     3.85
1631.85   20.680     6.00
1641.85   20.691     8.14
1651.85   20.702    10.28
1661.85   20.714    12.42
1671.85   20.725    14.55
1681.85   20.734    16.68
1691.85   20.740    18.82
1701.85   20.744    20.95
1711.85   20.742    23.08
1721.85   20.736    25.21
1731.85   20.724    27.34
1741.85   20.706    29.48
1751.85   20.680    31.62
1761.85   20.646    33.77
1771.85   20.603    35.92
1781.85   20.551    38.09
1791.85   20.489    40.26
1801.85   20.417    42.45
1811.85   20.334    44.66
1821.85   20.241    46.89
1831.85   20.137    49.14
1841.85   20.022    51.41
1851.85   19.896    53.71
1861.85   19.760    56.04
1871.85   19.613    58.41
1881.85   19.458    60.81
1891.85   19.293    63.25
1901.85   19.121    65.74
1911.85   18.943    68.27
1921.85   18.758    70.85
1931.85   18.570    73.48
1941.85   18.379    76.17
1951.85   18.188    78.91
1961.85   17.997    81.71
1971.85   17.810    84.57
1981.85   17.627    87.49
1991.85   17.451    90.47
2001.85   17.285    93.51
2011.85   17.130    96.61
2021.85   16.988    99.76
2031.85   16.862   102.96
2041.85   16.753   106.20
2051.85   16.664   109.49
2061.85   16.595   112.80
2071.85   16.549   116.14
2081.85   16.526   119.49
2091.85   16.528   122.85
2101.85   16.555   126.20
2111.85   16.607   129.54
2121.85   16.684   132.85
2131.85   16.787   136.12
2141.85   16.914   139.35
2151.85   17.066   142.53
2161.85   17.240   145.64
2171.85   17.436   148.69
2181.85   17.653   151.67
2191.85   17.889   154.58
2201.85   18.142   157.40
2211.85   18.412   160.15
2221.85   18.696   162.81
2231.85   18.994   165.39
2241.85   19.303   167.89
2251.85   19.621   170.31
2261.85   19.949   172.66
2271.85   20.283   174.92
2281.85   20.623   177.11
2291.85   20.967   179.23
2301.85   21.315   181.28
2311.85   21.665   183.27
2321.85   22.016   185.19
2331.85   22.367   187.05
2341.85   22.717   188.86
2351.85   23.065   190.61
2361.85   23.411   192.30
2371.85   23.753   193.95
2381.85   24.092   195.56
2391.85   24.426   197.11
2401.85   24.755   198.63
2411.85   25.078   200.11
2421.85   25.396   201.54
2431.85   25.707   202.95
2441.85   26.011   204.32
2451.85   26.307   205.66
2461.85   26.597   206.97
2471.85   26.878   208.25
2481.85   27.152   209.51
2491.85   27.417   210.74
2501.85   27.674   211.95
2511.85   27.922   213.13
2521.85   28.161   214.30
2531.85   28.391   215.45
2541.85   28.613   216.57
2551.85   28.825   217.69
2561.85   29.028   218.78
2571.85   29.221   219.86
2581.85   29.405   220.93
2591.85   29.580   221.98
2601.85   29.746   223.03
2611.85   29.902   224.06
2621.85   30.048   225.08
2631.85   30.185   226.09
2641.85   30.313   227.09
2651.85   30.431   228.08
2661.85   30.540   229.07
2671.85   30.639   230.05
2681.85   30.729   231.02
2691.85   30.810   231.99
2701.85   30.881   232.95
2711.85   30.944   233.91
2721.85   30.997   234.87
2731.85   31.041   235.82
2741.85   31.076   236.77
2751.85   31.103   237.72
2761.85   31.120   238.67
2771.85   31.129   239.61
2781.85   31.130   240.56
2791.85   31.121   241.51
2801.85   31.105   242.45
2811.85   31.080   243.40
2821.85   31.047   244.35
2831.85   31.005   245.30
2841.85   30.956   246.26
2851.85   30.899   247.22
2861.85   30.835   248.18
2871.85   30.762   249.14
2881.85   30.683   250.12
2891.85   30.596   251.09
2901.85   30.502   252.07
2911.85   30.401   253.06
2921.85   30.293   254.06
2931.85   30.179   255.06
2941.85   30.058   256.07
2951.85   29.931   257.09
2961.85   29.797   258.12
2971.85   29.658   259.16
2981.85   29.513   260.20
2991.85   29.362   261.26
3001.85   29.206   262.33
3011.85   29.045   263.41






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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 16:15:57



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