Double Star Calculator - Orbit

Orbital Elements for STF2315AB

WDS:	STF2315AB	WDS ID/Discoverer
P:	2094.000	Orbital period (years)
a:	2.062	Semi-major axis (arcseconds)
i:	107.6	Inclination (degrees)
Ω:	127.7	Longitude of ascending node (degrees)
T:	1982.000	Epoch of periastron passage (year)
e:	0.6877	Eccentricity
ω:	352.4	Longitude of periastron (degrees)
Start-Year:	978.0	Year
End-Year:	3072.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2315AB
Position:	182458.46+272341.3	Epoch-2000 right ascension and declination
WDS-ID:	18250+2724	WDS designation
Discoverer Code:	STF2315AB	Discover designation and components
ADS number:	11334	Aitken Double Star catalog
HD number:	169718	HD catalog number
Hipparcos number:	90256	Hipparcos catalog number
V1:	6.57	Magnitude of the primary
V2:	7.77	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2003	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:	WSI2004b	Reference

Double Star Orbit for STF2315AB

WDS 6th Orbit including measures of STF2315AB

-- 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 STF2315AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.574   111.81
--------------------------
978.00    3.460   309.43
988.00    3.460   309.30
998.00    3.460   309.17
1008.00    3.459   309.03
1018.00    3.457   308.90
1028.00    3.455   308.76
1038.00    3.452   308.63
1048.00    3.448   308.49
1058.00    3.444   308.36
1068.00    3.439   308.22
1078.00    3.433   308.09
1088.00    3.427   307.95
1098.00    3.420   307.81
1108.00    3.413   307.68
1118.00    3.404   307.54
1128.00    3.396   307.40
1138.00    3.386   307.26
1148.00    3.376   307.12
1158.00    3.365   306.98
1168.00    3.353   306.84
1178.00    3.341   306.69
1188.00    3.328   306.55
1198.00    3.315   306.40
1208.00    3.300   306.26
1218.00    3.286   306.11
1228.00    3.270   305.96
1238.00    3.253   305.81
1248.00    3.236   305.66
1258.00    3.219   305.50
1268.00    3.200   305.35
1278.00    3.181   305.19
1288.00    3.161   305.03
1298.00    3.140   304.87
1308.00    3.119   304.70
1318.00    3.096   304.54
1328.00    3.073   304.37
1338.00    3.050   304.20
1348.00    3.025   304.02
1358.00    3.000   303.85
1368.00    2.974   303.67
1378.00    2.947   303.48
1388.00    2.919   303.30
1398.00    2.890   303.11
1408.00    2.861   302.91
1418.00    2.831   302.71
1428.00    2.800   302.51
1438.00    2.768   302.30
1448.00    2.735   302.09
1458.00    2.701   301.88
1468.00    2.667   301.65
1478.00    2.631   301.42
1488.00    2.595   301.19
1498.00    2.558   300.95
1508.00    2.519   300.70
1518.00    2.480   300.44
1528.00    2.440   300.18
1538.00    2.399   299.90
1548.00    2.357   299.62
1558.00    2.313   299.32
1568.00    2.269   299.02
1578.00    2.224   298.70
1588.00    2.177   298.37
1598.00    2.130   298.02
1608.00    2.081   297.66
1618.00    2.031   297.28
1628.00    1.980   296.88
1638.00    1.928   296.46
1648.00    1.875   296.02
1658.00    1.820   295.55
1668.00    1.764   295.05
1678.00    1.707   294.52
1688.00    1.649   293.95
1698.00    1.589   293.33
1708.00    1.528   292.67
1718.00    1.466   291.96
1728.00    1.402   291.18
1738.00    1.337   290.32
1748.00    1.271   289.38
1758.00    1.203   288.33
1768.00    1.134   287.15
1778.00    1.063   285.82
1788.00    0.991   284.30
1798.00    0.918   282.53
1808.00    0.844   280.46
1818.00    0.770   278.00
1828.00    0.695   275.00
1838.00    0.620   271.27
1848.00    0.547   266.54
1858.00    0.476   260.36
1868.00    0.410   252.12
1878.00    0.354   241.02
1888.00    0.314   226.43
1898.00    0.296   208.88
1908.00    0.305   190.84
1918.00    0.338   175.14
1928.00    0.388   162.85
1938.00    0.445   153.53
1948.00    0.503   146.36
1958.00    0.556   140.63
1968.00    0.600   135.83
1978.00    0.631   131.60
1988.00    0.646   127.68
1998.00    0.646   123.85
2008.00    0.631   119.93
2018.00    0.604   115.74
2028.00    0.568   111.07
2038.00    0.526   105.70
2048.00    0.482    99.37
2058.00    0.439    91.76
2068.00    0.400    82.60
2078.00    0.371    71.74
2088.00    0.354    59.46
2098.00    0.353    46.53
2108.00    0.367    34.07
2118.00    0.396    22.98
2128.00    0.436    13.64
2138.00    0.483     6.00
2148.00    0.537   359.81
2158.00    0.594   354.77
2168.00    0.653   350.62
2178.00    0.714   347.18
2188.00    0.775   344.28
2198.00    0.837   341.81
2208.00    0.899   339.68
2218.00    0.961   337.82
2228.00    1.022   336.19
2238.00    1.083   334.74
2248.00    1.143   333.44
2258.00    1.202   332.28
2268.00    1.261   331.22
2278.00    1.319   330.25
2288.00    1.376   329.37
2298.00    1.432   328.55
2308.00    1.487   327.80
2318.00    1.541   327.10
2328.00    1.595   326.45
2338.00    1.648   325.84
2348.00    1.699   325.26
2358.00    1.750   324.72
2368.00    1.800   324.22
2378.00    1.849   323.73
2388.00    1.898   323.28
2398.00    1.945   322.84
2408.00    1.991   322.43
2418.00    2.037   322.03
2428.00    2.082   321.65
2438.00    2.126   321.29
2448.00    2.169   320.94
2458.00    2.211   320.61
2468.00    2.253   320.29
2478.00    2.294   319.98
2488.00    2.334   319.68
2498.00    2.373   319.39
2508.00    2.411   319.11
2518.00    2.449   318.83
2528.00    2.486   318.57
2538.00    2.522   318.31
2548.00    2.557   318.07
2558.00    2.592   317.82
2568.00    2.626   317.59
2578.00    2.659   317.36
2588.00    2.691   317.13
2598.00    2.723   316.91
2608.00    2.754   316.70
2618.00    2.784   316.49
2628.00    2.813   316.29
2638.00    2.842   316.09
2648.00    2.870   315.89
2658.00    2.898   315.70
2668.00    2.925   315.51
2678.00    2.951   315.32
2688.00    2.976   315.14
2698.00    3.001   314.96
2708.00    3.025   314.78
2718.00    3.048   314.61
2728.00    3.071   314.44
2738.00    3.093   314.27
2748.00    3.114   314.10
2758.00    3.135   313.94
2768.00    3.155   313.77
2778.00    3.174   313.61
2788.00    3.193   313.46
2798.00    3.211   313.30
2808.00    3.228   313.14
2818.00    3.245   312.99
2828.00    3.261   312.84
2838.00    3.277   312.69
2848.00    3.292   312.54
2858.00    3.306   312.39
2868.00    3.320   312.25
2878.00    3.333   312.10
2888.00    3.345   311.96
2898.00    3.357   311.81
2908.00    3.368   311.67
2918.00    3.378   311.53
2928.00    3.388   311.39
2938.00    3.397   311.25
2948.00    3.406   311.11
2958.00    3.414   310.98
2968.00    3.421   310.84
2978.00    3.428   310.70
2988.00    3.434   310.57
2998.00    3.439   310.43
3008.00    3.444   310.29
3018.00    3.448   310.16
3028.00    3.452   310.02
3038.00    3.455   309.89
3048.00    3.457   309.75
3058.00    3.459   309.62
3068.00    3.460   309.49

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 17:51:37