Double Star Calculator - Orbit

Orbital Elements for STF2106AB

WDS:	STF2106AB	WDS ID/Discoverer
P:	1270.020	Orbital period (years)
a:	1.398	Semi-major axis (arcseconds)
i:	103.8	Inclination (degrees)
Ω:	159.5	Longitude of ascending node (degrees)
T:	1915.400	Epoch of periastron passage (year)
e:	0.349	Eccentricity
ω:	261.6	Longitude of periastron (degrees)
Start-Year:	1389.99	Year
End-Year:	2660.01	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2106AB
Position:	165107.42+092415.5	Epoch-2000 right ascension and declination
WDS-ID:	16511+0924	WDS designation
Discoverer Code:	STF2106AB	Discover designation and components
ADS number:	10229	Aitken Double Star catalog
HD number:	152113	HD catalog number
Hipparcos number:	82460	Hipparcos catalog number
V1:	7.07	Magnitude of the primary
V2:	8.20	Magnitude of the secondary
Equinox:		Equinox
Date:	1999	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Sca2001g	Reference

Double Star Orbit for STF2106AB

WDS 6th Orbit including measures of STF2106AB

-- 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 STF2106AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.871   169.24
--------------------------
1389.99    0.504    39.55
1399.99    0.526    34.87
1409.99    0.551    30.60
1419.99    0.578    26.71
1429.99    0.607    23.18
1439.99    0.638    19.98
1449.99    0.669    17.08
1459.99    0.702    14.44
1469.99    0.734    12.04
1479.99    0.767     9.84
1489.99    0.801     7.83
1499.99    0.834     5.97
1509.99    0.867     4.26
1519.99    0.899     2.67
1529.99    0.931     1.19
1539.99    0.962   359.80
1549.99    0.992   358.51
1559.99    1.021   357.28
1569.99    1.049   356.13
1579.99    1.076   355.03
1589.99    1.101   353.99
1599.99    1.125   352.99
1609.99    1.147   352.03
1619.99    1.168   351.11
1629.99    1.186   350.21
1639.99    1.202   349.34
1649.99    1.216   348.50
1659.99    1.228   347.67
1669.99    1.236   346.85
1679.99    1.242   346.05
1689.99    1.246   345.25
1699.99    1.245   344.45
1709.99    1.242   343.65
1719.99    1.235   342.84
1729.99    1.224   342.02
1739.99    1.209   341.19
1749.99    1.190   340.33
1759.99    1.166   339.43
1769.99    1.138   338.50
1779.99    1.105   337.52
1789.99    1.067   336.47
1799.99    1.024   335.34
1809.99    0.976   334.10
1819.99    0.923   332.73
1829.99    0.864   331.17
1839.99    0.800   329.38
1849.99    0.732   327.27
1859.99    0.660   324.71
1869.99    0.584   321.50
1879.99    0.506   317.31
1889.99    0.427   311.57
1899.99    0.351   303.27
1909.99    0.283   290.69
1919.99    0.233   271.57
1929.99    0.218   246.46
1939.99    0.244   222.54
1949.99    0.300   205.39
1959.99    0.371   194.21
1969.99    0.449   186.77
1979.99    0.529   181.55
1989.99    0.607   177.70
1999.99    0.684   174.72
2009.99    0.758   172.33
2019.99    0.828   170.36
2029.99    0.894   168.69
2039.99    0.956   167.24
2049.99    1.013   165.96
2059.99    1.066   164.81
2069.99    1.114   163.77
2079.99    1.158   162.81
2089.99    1.198   161.92
2099.99    1.233   161.08
2109.99    1.265   160.29
2119.99    1.293   159.53
2129.99    1.316   158.81
2139.99    1.336   158.10
2149.99    1.353   157.42
2159.99    1.366   156.75
2169.99    1.376   156.09
2179.99    1.384   155.44
2189.99    1.388   154.79
2199.99    1.389   154.15
2209.99    1.388   153.51
2219.99    1.384   152.87
2229.99    1.377   152.22
2239.99    1.369   151.56
2249.99    1.358   150.89
2259.99    1.345   150.22
2269.99    1.331   149.52
2279.99    1.314   148.82
2289.99    1.295   148.09
2299.99    1.275   147.34
2309.99    1.254   146.56
2319.99    1.231   145.76
2329.99    1.206   144.93
2339.99    1.180   144.06
2349.99    1.153   143.15
2359.99    1.125   142.19
2369.99    1.096   141.19
2379.99    1.066   140.13
2389.99    1.035   139.01
2399.99    1.003   137.81
2409.99    0.970   136.54
2419.99    0.937   135.18
2429.99    0.904   133.72
2439.99    0.870   132.14
2449.99    0.836   130.44
2459.99    0.802   128.59
2469.99    0.768   126.58
2479.99    0.734   124.39
2489.99    0.701   121.98
2499.99    0.668   119.34
2509.99    0.636   116.42
2519.99    0.606   113.21
2529.99    0.577   109.66
2539.99    0.549   105.75
2549.99    0.524   101.45
2559.99    0.502    96.74
2569.99    0.483    91.63
2579.99    0.468    86.14
2589.99    0.456    80.33
2599.99    0.449    74.28
2609.99    0.447    68.10
2619.99    0.450    61.94
2629.99    0.457    55.90
2639.99    0.469    50.11
2649.99    0.484    44.64
2659.99    0.504    39.56

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.

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Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 17:31:17