Double Star Calculator - Orbit

Orbital Elements for STF982AB
WDS: STF982AB WDS ID/Discoverer
P: 1749.905 Orbital period (years)
a: 11.96064 Semi-major axis (arcseconds)
i: 116.481 Inclination (degrees)
Ω: 36.824 Longitude of ascending node (degrees)
T: 1678.603 Epoch of periastron passage (year)
e: 0.84082 Eccentricity
ω: 104.38 Longitude of periastron (degrees)
Start-Year: 1150.0475999999999 Year
End-Year: 2899.9524 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF982AB
Position: 065438.63+131040.1 Epoch-2000 right ascension and declination
WDS-ID: 06546+1311 WDS designation
Discoverer Code: STF982AB Discover designation and components
ADS number: 5559 Aitken Double Star catalog
HD number: 50635 HD catalog number
Hipparcos number: 33202 Hipparcos catalog number
V1: 4.75 Magnitude of the primary
V2: 7.80 Magnitude of the secondary
Equinox: Equinox
Date: 2014 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: Izm2019 Reference

Double Star Orbit for STF982AB



WDS 6th Orbit including measures of STF982AB

-- 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 STF982AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    7.441   141.74
--------------------------
1150.05   11.788    78.44
1160.05   11.778    77.92
1170.05   11.764    77.41
1180.05   11.749    76.90
1190.05   11.730    76.38
1200.05   11.709    75.87
1210.05   11.684    75.35
1220.05   11.657    74.82
1230.05   11.627    74.30
1240.05   11.594    73.77
1250.05   11.557    73.24
1260.05   11.517    72.71
1270.05   11.473    72.17
1280.05   11.426    71.63
1290.05   11.375    71.08
1300.05   11.320    70.53
1310.05   11.261    69.97
1320.05   11.198    69.41
1330.05   11.130    68.84
1340.05   11.058    68.26
1350.05   10.981    67.68
1360.05   10.899    67.09
1370.05   10.811    66.48
1380.05   10.718    65.87
1390.05   10.620    65.25
1400.05   10.515    64.61
1410.05   10.404    63.96
1420.05   10.286    63.30
1430.05   10.160    62.62
1440.05   10.027    61.92
1450.05    9.886    61.20
1460.05    9.736    60.47
1470.05    9.577    59.70
1480.05    9.408    58.92
1490.05    9.228    58.10
1500.05    9.036    57.25
1510.05    8.832    56.36
1520.05    8.613    55.42
1530.05    8.379    54.44
1540.05    8.128    53.40
1550.05    7.858    52.28
1560.05    7.567    51.09
1570.05    7.251    49.80
1580.05    6.908    48.38
1590.05    6.532    46.81
1600.05    6.118    45.03
1610.05    5.658    42.98
1620.05    5.142    40.54
1630.05    4.556    37.52
1640.05    3.879    33.52
1650.05    3.084    27.62
1660.05    2.145    16.98
1670.05    1.143   347.60
1680.05    1.044   266.52
1690.05    1.969   231.34
1700.05    2.770   218.54
1710.05    3.362   210.98
1720.05    3.808   205.46
1730.05    4.159   200.99
1740.05    4.444   197.16
1750.05    4.682   193.75
1760.05    4.886   190.65
1770.05    5.064   187.78
1780.05    5.222   185.09
1790.05    5.365   182.56
1800.05    5.495   180.15
1810.05    5.616   177.85
1820.05    5.728   175.64
1830.05    5.834   173.51
1840.05    5.934   171.46
1850.05    6.030   169.48
1860.05    6.122   167.55
1870.05    6.211   165.69
1880.05    6.297   163.87
1890.05    6.382   162.10
1900.05    6.464   160.38
1910.05    6.545   158.70
1920.05    6.625   157.06
1930.05    6.704   155.46
1940.05    6.782   153.90
1950.05    6.860   152.37
1960.05    6.937   150.88
1970.05    7.013   149.42
1980.05    7.090   147.99
1990.05    7.166   146.59
2000.05    7.241   145.23
2010.05    7.317   143.88
2020.05    7.392   142.57
2030.05    7.467   141.28
2040.05    7.543   140.02
2050.05    7.618   138.79
2060.05    7.693   137.57
2070.05    7.768   136.39
2080.05    7.842   135.22
2090.05    7.917   134.08
2100.05    7.992   132.95
2110.05    8.067   131.85
2120.05    8.141   130.77
2130.05    8.215   129.71
2140.05    8.290   128.66
2150.05    8.364   127.64
2160.05    8.438   126.63
2170.05    8.511   125.64
2180.05    8.585   124.67
2190.05    8.658   123.72
2200.05    8.731   122.78
2210.05    8.804   121.85
2220.05    8.877   120.94
2230.05    8.949   120.05
2240.05    9.021   119.17
2250.05    9.092   118.30
2260.05    9.163   117.45
2270.05    9.234   116.61
2280.05    9.304   115.78
2290.05    9.374   114.97
2300.05    9.443   114.17
2310.05    9.512   113.38
2320.05    9.580   112.60
2330.05    9.648   111.83
2340.05    9.715   111.07
2350.05    9.782   110.32
2360.05    9.848   109.58
2370.05    9.913   108.86
2380.05    9.978   108.14
2390.05   10.042   107.43
2400.05   10.105   106.73
2410.05   10.167   106.04
2420.05   10.229   105.36
2430.05   10.290   104.68
2440.05   10.350   104.01
2450.05   10.410   103.35
2460.05   10.468   102.70
2470.05   10.526   102.06
2480.05   10.583   101.42
2490.05   10.639   100.79
2500.05   10.693   100.16
2510.05   10.747    99.55
2520.05   10.800    98.93
2530.05   10.852    98.33
2540.05   10.903    97.73
2550.05   10.953    97.13
2560.05   11.001    96.54
2570.05   11.049    95.96
2580.05   11.095    95.38
2590.05   11.141    94.81
2600.05   11.185    94.24
2610.05   11.228    93.67
2620.05   11.269    93.11
2630.05   11.309    92.55
2640.05   11.348    92.00
2650.05   11.386    91.45
2660.05   11.422    90.90
2670.05   11.457    90.36
2680.05   11.491    89.82
2690.05   11.523    89.28
2700.05   11.553    88.75
2710.05   11.582    88.22
2720.05   11.609    87.69
2730.05   11.635    87.16
2740.05   11.659    86.64
2750.05   11.682    86.12
2760.05   11.702    85.60
2770.05   11.721    85.08
2780.05   11.739    84.56
2790.05   11.754    84.05
2800.05   11.768    83.54
2810.05   11.779    83.02
2820.05   11.789    82.51
2830.05   11.796    82.00
2840.05   11.802    81.49
2850.05   11.805    80.98
2860.05   11.806    80.47
2870.05   11.805    79.96
2880.05   11.802    79.45
2890.05   11.796    78.94






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 15:52:38



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