Double Star Calculator - Orbit

Orbital Elements for STF1957
WDS: STF1957 WDS ID/Discoverer
P: 1524.416 Orbital period (years)
a: 5.64316 Semi-major axis (arcseconds)
i: 91.064 Inclination (degrees)
Ω: 159.772 Longitude of ascending node (degrees)
T: 1746.680 Epoch of periastron passage (year)
e: 0.86815 Eccentricity
ω: 289.557 Longitude of periastron (degrees)
Start-Year: 1262.79205 Year
End-Year: 2787.20795 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1957
Position: 153551.05+125458.7 Epoch-2000 right ascension and declination
WDS-ID: 15359+1255 WDS designation
Discoverer Code: STF1957 Discover designation and components
ADS number: 9708 Aitken Double Star catalog
HD number: 139086 HD catalog number
Hipparcos number: 76368 Hipparcos catalog number
V1: 7.96 Magnitude of the primary
V2: 9.43 Magnitude of the secondary
Equinox: Equinox
Date: 2008 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF1957



WDS 6th Orbit including measures of STF1957

-- 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 STF1957
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.167   103.29
--------------------------
1262.79    4.727   341.65
1272.79    4.751   341.62
1282.79    4.773   341.59
1292.79    4.793   341.56
1302.79    4.811   341.53
1312.79    4.828   341.50
1322.79    4.842   341.47
1332.79    4.855   341.44
1342.79    4.866   341.41
1352.79    4.874   341.38
1362.79    4.881   341.35
1372.79    4.885   341.32
1382.79    4.887   341.29
1392.79    4.887   341.27
1402.79    4.884   341.24
1412.79    4.878   341.21
1422.79    4.870   341.18
1432.79    4.859   341.15
1442.79    4.845   341.12
1452.79    4.827   341.09
1462.79    4.807   341.06
1472.79    4.783   341.03
1482.79    4.756   341.00
1492.79    4.725   340.97
1502.79    4.689   340.94
1512.79    4.650   340.91
1522.79    4.606   340.87
1532.79    4.557   340.84
1542.79    4.503   340.81
1552.79    4.443   340.77
1562.79    4.378   340.74
1572.79    4.306   340.70
1582.79    4.227   340.66
1592.79    4.140   340.62
1602.79    4.045   340.58
1612.79    3.940   340.54
1622.79    3.824   340.49
1632.79    3.697   340.44
1642.79    3.556   340.39
1652.79    3.400   340.33
1662.79    3.225   340.27
1672.79    3.028   340.20
1682.79    2.805   340.12
1692.79    2.548   340.02
1702.79    2.246   339.90
1712.79    1.885   339.74
1722.79    1.437   339.48
1732.79    0.853   338.93
1742.79    0.081   329.51
1752.79    0.701   160.44
1762.79    1.164   159.64
1772.79    1.401   159.22
1782.79    1.523   158.90
1792.79    1.583   158.61
1802.79    1.605   158.34
1812.79    1.601   158.07
1822.79    1.579   157.80
1832.79    1.544   157.51
1842.79    1.500   157.21
1852.79    1.447   156.89
1862.79    1.388   156.55
1872.79    1.325   156.17
1882.79    1.257   155.76
1892.79    1.187   155.29
1902.79    1.113   154.77
1912.79    1.038   154.17
1922.79    0.961   153.47
1932.79    0.882   152.66
1942.79    0.803   151.68
1952.79    0.722   150.48
1962.79    0.642   148.99
1972.79    0.561   147.06
1982.79    0.480   144.49
1992.79    0.400   140.88
2002.79    0.322   135.49
2012.79    0.249   126.82
2022.79    0.185   111.63
2032.79    0.146    85.07
2042.79    0.151    51.69
2052.79    0.197    27.59
2062.79    0.263    14.05
2072.79    0.337     6.21
2082.79    0.416     1.27
2092.79    0.496   357.91
2102.79    0.578   355.49
2112.79    0.659   353.67
2122.79    0.741   352.25
2132.79    0.823   351.12
2142.79    0.905   350.19
2152.79    0.987   349.41
2162.79    1.069   348.76
2172.79    1.150   348.19
2182.79    1.230   347.70
2192.79    1.311   347.27
2202.79    1.391   346.89
2212.79    1.470   346.55
2222.79    1.549   346.25
2232.79    1.628   345.97
2242.79    1.706   345.72
2252.79    1.783   345.50
2262.79    1.860   345.29
2272.79    1.936   345.10
2282.79    2.012   344.92
2292.79    2.087   344.75
2302.79    2.161   344.60
2312.79    2.235   344.46
2322.79    2.308   344.32
2332.79    2.381   344.20
2342.79    2.453   344.08
2352.79    2.524   343.96
2362.79    2.594   343.86
2372.79    2.664   343.76
2382.79    2.733   343.66
2392.79    2.801   343.57
2402.79    2.868   343.49
2412.79    2.935   343.40
2422.79    3.001   343.33
2432.79    3.066   343.25
2442.79    3.130   343.18
2452.79    3.194   343.11
2462.79    3.256   343.04
2472.79    3.318   342.98
2482.79    3.379   342.92
2492.79    3.439   342.86
2502.79    3.498   342.80
2512.79    3.556   342.74
2522.79    3.614   342.69
2532.79    3.670   342.64
2542.79    3.725   342.59
2552.79    3.780   342.54
2562.79    3.833   342.49
2572.79    3.886   342.44
2582.79    3.937   342.40
2592.79    3.988   342.35
2602.79    4.037   342.31
2612.79    4.085   342.27
2622.79    4.132   342.23
2632.79    4.178   342.19
2642.79    4.223   342.15
2652.79    4.267   342.11
2662.79    4.309   342.07
2672.79    4.351   342.03
2682.79    4.391   342.00
2692.79    4.429   341.96
2702.79    4.467   341.93
2712.79    4.503   341.89
2722.79    4.538   341.86
2732.79    4.571   341.83
2742.79    4.603   341.79
2752.79    4.634   341.76
2762.79    4.663   341.73
2772.79    4.690   341.70
2782.79    4.716   341.66






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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 17:17:21



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