Double Star Calculator - Orbit

Orbital Elements for STF1553
WDS: STF1553 WDS ID/Discoverer
P: 1996.000 Orbital period (years)
a: 4.611 Semi-major axis (arcseconds)
i: 110.4 Inclination (degrees)
Ω: 165.8 Longitude of ascending node (degrees)
T: 1247.000 Epoch of periastron passage (year)
e: 0.39 Eccentricity
ω: 200.0 Longitude of periastron (degrees)
Start-Year: 1027.0 Year
End-Year: 3023.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1553
Position: 113635.69+560807.3 Epoch-2000 right ascension and declination
WDS-ID: 11366+5608 WDS designation
Discoverer Code: STF1553 Discover designation and components
ADS number: 8236 Aitken Double Star catalog
HD number: 100831 HD catalog number
Hipparcos number: 56622 Hipparcos catalog number
V1: 7.73 Magnitude of the primary
V2: 8.17 Magnitude of the secondary
Equinox: Equinox
Date: 2018 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: Kiy2018a Reference

Double Star Orbit for STF1553



WDS 6th Orbit including measures of STF1553

-- 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 STF1553
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    6.188   165.53
--------------------------
1027.00    2.117    17.71
1037.00    2.192    15.05
1047.00    2.266    12.57
1057.00    2.339    10.25
1067.00    2.411     8.07
1077.00    2.480     6.01
1087.00    2.546     4.06
1097.00    2.608     2.21
1107.00    2.665     0.44
1117.00    2.717   358.74
1127.00    2.764   357.10
1137.00    2.803   355.51
1147.00    2.835   353.97
1157.00    2.860   352.45
1167.00    2.876   350.95
1177.00    2.883   349.47
1187.00    2.881   347.99
1197.00    2.870   346.50
1207.00    2.849   345.00
1217.00    2.817   343.46
1227.00    2.776   341.89
1237.00    2.725   340.26
1247.00    2.664   338.57
1257.00    2.594   336.79
1267.00    2.516   334.91
1277.00    2.430   332.89
1287.00    2.336   330.73
1297.00    2.236   328.37
1307.00    2.131   325.79
1317.00    2.023   322.93
1327.00    1.912   319.75
1337.00    1.801   316.18
1347.00    1.691   312.14
1357.00    1.585   307.54
1367.00    1.485   302.31
1377.00    1.395   296.36
1387.00    1.317   289.64
1397.00    1.256   282.18
1407.00    1.214   274.08
1417.00    1.195   265.57
1427.00    1.200   256.96
1437.00    1.229   248.58
1447.00    1.279   240.73
1457.00    1.349   233.58
1467.00    1.435   227.21
1477.00    1.534   221.61
1487.00    1.642   216.72
1497.00    1.759   212.45
1507.00    1.881   208.73
1517.00    2.006   205.47
1527.00    2.135   202.59
1537.00    2.265   200.05
1547.00    2.396   197.78
1557.00    2.527   195.75
1567.00    2.657   193.91
1577.00    2.787   192.25
1587.00    2.916   190.74
1597.00    3.043   189.35
1607.00    3.169   188.07
1617.00    3.293   186.89
1627.00    3.414   185.80
1637.00    3.534   184.78
1647.00    3.651   183.83
1657.00    3.766   182.93
1667.00    3.878   182.09
1677.00    3.988   181.29
1687.00    4.096   180.54
1697.00    4.201   179.82
1707.00    4.303   179.14
1717.00    4.402   178.49
1727.00    4.499   177.87
1737.00    4.594   177.28
1747.00    4.685   176.70
1757.00    4.774   176.15
1767.00    4.860   175.62
1777.00    4.944   175.11
1787.00    5.025   174.62
1797.00    5.103   174.14
1807.00    5.178   173.67
1817.00    5.251   173.22
1827.00    5.321   172.78
1837.00    5.389   172.35
1847.00    5.454   171.93
1857.00    5.516   171.52
1867.00    5.576   171.12
1877.00    5.633   170.73
1887.00    5.687   170.34
1897.00    5.739   169.97
1907.00    5.789   169.60
1917.00    5.836   169.23
1927.00    5.880   168.87
1937.00    5.922   168.52
1947.00    5.961   168.17
1957.00    5.998   167.83
1967.00    6.033   167.49
1977.00    6.065   167.15
1987.00    6.094   166.82
1997.00    6.122   166.49
2007.00    6.146   166.16
2017.00    6.169   165.84
2027.00    6.189   165.51
2037.00    6.207   165.19
2047.00    6.222   164.88
2057.00    6.235   164.56
2067.00    6.246   164.24
2077.00    6.255   163.93
2087.00    6.261   163.61
2097.00    6.265   163.30
2107.00    6.267   162.99
2117.00    6.267   162.67
2127.00    6.264   162.36
2137.00    6.259   162.04
2147.00    6.252   161.73
2157.00    6.243   161.41
2167.00    6.232   161.10
2177.00    6.218   160.78
2187.00    6.203   160.46
2197.00    6.185   160.14
2207.00    6.165   159.82
2217.00    6.143   159.49
2227.00    6.119   159.17
2237.00    6.093   158.84
2247.00    6.065   158.50
2257.00    6.035   158.17
2267.00    6.003   157.83
2277.00    5.969   157.48
2287.00    5.933   157.14
2297.00    5.895   156.78
2307.00    5.855   156.43
2317.00    5.813   156.07
2327.00    5.769   155.70
2337.00    5.723   155.33
2347.00    5.675   154.95
2357.00    5.626   154.56
2367.00    5.574   154.17
2377.00    5.521   153.77
2387.00    5.466   153.36
2397.00    5.409   152.94
2407.00    5.350   152.52
2417.00    5.289   152.08
2427.00    5.227   151.64
2437.00    5.163   151.18
2447.00    5.097   150.72
2457.00    5.029   150.24
2467.00    4.960   149.74
2477.00    4.889   149.23
2487.00    4.816   148.71
2497.00    4.742   148.17
2507.00    4.667   147.62
2517.00    4.589   147.04
2527.00    4.510   146.45
2537.00    4.430   145.83
2547.00    4.348   145.19
2557.00    4.265   144.53
2567.00    4.181   143.84
2577.00    4.095   143.12
2587.00    4.008   142.37
2597.00    3.919   141.59
2607.00    3.830   140.77
2617.00    3.739   139.91
2627.00    3.648   139.00
2637.00    3.555   138.06
2647.00    3.462   137.06
2657.00    3.368   136.00
2667.00    3.273   134.88
2677.00    3.178   133.70
2687.00    3.082   132.44
2697.00    2.987   131.11
2707.00    2.891   129.68
2717.00    2.795   128.16
2727.00    2.700   126.53
2737.00    2.605   124.78
2747.00    2.511   122.89
2757.00    2.418   120.87
2767.00    2.327   118.68
2777.00    2.238   116.32
2787.00    2.152   113.76
2797.00    2.068   110.99
2807.00    1.988   108.00
2817.00    1.913   104.76
2827.00    1.842   101.27
2837.00    1.777    97.51
2847.00    1.719    93.48
2857.00    1.668    89.18
2867.00    1.626    84.64
2877.00    1.593    79.88
2887.00    1.569    74.95
2897.00    1.556    69.91
2907.00    1.553    64.81
2917.00    1.561    59.73
2927.00    1.579    54.73
2937.00    1.607    49.87
2947.00    1.644    45.21
2957.00    1.689    40.77
2967.00    1.741    36.58
2977.00    1.799    32.65
2987.00    1.862    28.97
2997.00    1.930    25.55
3007.00    2.000    22.36
3017.00    2.073    19.39






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 16:39:51



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