Double Star Calculator - Orbit

Orbital Elements for STF1954AB

WDS:	STF1954AB	WDS ID/Discoverer
P:	1150.104	Orbital period (years)
a:	6.37793	Semi-major axis (arcseconds)
i:	101.216	Inclination (degrees)
Ω:	162.085	Longitude of ascending node (degrees)
T:	2138.944	Epoch of periastron passage (year)
e:	0.68349	Eccentricity
ω:	80.433	Longitude of periastron (degrees)
Start-Year:	1449.94775	Year
End-Year:	2600.0522499999997	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1954AB
Position:	153448.14+103220.0	Epoch-2000 right ascension and declination
WDS-ID:	15348+1032	WDS designation
Discoverer Code:	STF1954AB	Discover designation and components
ADS number:	9701	Aitken Double Star catalog
HD number:	138917	HD catalog number
Hipparcos number:	76276	Hipparcos catalog number
V1:	4.17	Magnitude of the primary
V2:	5.16	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	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 STF1954AB

WDS 6th Orbit including measures of STF1954AB

-- 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 STF1954AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    4.020   170.86
--------------------------
1449.95    3.892   312.52
1459.95    3.789   311.30
1469.95    3.684   310.00
1479.95    3.579   308.63
1489.95    3.474   307.18
1499.95    3.369   305.63
1509.95    3.265   303.99
1519.95    3.161   302.24
1529.95    3.059   300.37
1539.95    2.958   298.37
1549.95    2.859   296.23
1559.95    2.762   293.94
1569.95    2.669   291.49
1579.95    2.579   288.86
1589.95    2.493   286.05
1599.95    2.412   283.04
1609.95    2.337   279.83
1619.95    2.268   276.42
1629.95    2.206   272.81
1639.95    2.152   269.00
1649.95    2.107   265.00
1659.95    2.070   260.86
1669.95    2.044   256.58
1679.95    2.028   252.22
1689.95    2.022   247.80
1699.95    2.027   243.39
1709.95    2.043   239.02
1719.95    2.069   234.74
1729.95    2.104   230.58
1739.95    2.149   226.58
1749.95    2.202   222.76
1759.95    2.262   219.13
1769.95    2.329   215.69
1779.95    2.403   212.46
1789.95    2.481   209.43
1799.95    2.563   206.58
1809.95    2.650   203.92
1819.95    2.739   201.43
1829.95    2.830   199.10
1839.95    2.922   196.91
1849.95    3.015   194.86
1859.95    3.109   192.93
1869.95    3.202   191.11
1879.95    3.294   189.40
1889.95    3.384   187.78
1899.95    3.472   186.24
1909.95    3.557   184.78
1919.95    3.638   183.38
1929.95    3.715   182.04
1939.95    3.787   180.76
1949.95    3.853   179.52
1959.95    3.911   178.32
1969.95    3.962   177.15
1979.95    4.003   176.01
1989.95    4.033   174.89
1999.95    4.051   173.79
2009.95    4.054   172.69
2019.95    4.040   171.59
2029.95    4.006   170.47
2039.95    3.948   169.33
2049.95    3.861   168.14
2059.95    3.741   166.89
2069.95    3.579   165.55
2079.95    3.366   164.05
2089.95    3.090   162.32
2099.95    2.737   160.19
2109.95    2.289   157.32
2119.95    1.735   152.81
2129.95    1.085   143.28
2139.95    0.466   105.37
2149.95    0.668    18.23
2159.95    1.342   357.88
2169.95    1.987   351.15
2179.95    2.552   347.60
2189.95    3.038   345.28
2199.95    3.452   343.56
2209.95    3.806   342.19
2219.95    4.108   341.04
2229.95    4.365   340.03
2239.95    4.585   339.13
2249.95    4.773   338.30
2259.95    4.932   337.54
2269.95    5.067   336.81
2279.95    5.180   336.13
2289.95    5.274   335.46
2299.95    5.350   334.82
2309.95    5.411   334.20
2319.95    5.457   333.59
2329.95    5.491   332.98
2339.95    5.513   332.39
2349.95    5.524   331.79
2359.95    5.526   331.20
2369.95    5.518   330.61
2379.95    5.502   330.01
2389.95    5.479   329.41
2399.95    5.448   328.81
2409.95    5.411   328.20
2419.95    5.367   327.57
2429.95    5.317   326.94
2439.95    5.263   326.29
2449.95    5.203   325.63
2459.95    5.138   324.96
2469.95    5.069   324.26
2479.95    4.996   323.55
2489.95    4.919   322.81
2499.95    4.839   322.06
2509.95    4.755   321.27
2519.95    4.669   320.46
2529.95    4.579   319.61
2539.95    4.487   318.73
2549.95    4.393   317.81
2559.95    4.296   316.85
2569.95    4.198   315.85
2579.95    4.098   314.80
2589.95    3.996   313.70
2599.95    3.893   312.54

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 17:17:07