Double Star Calculator - Orbit

Orbital Elements for AG366

WDS:	AG366	WDS ID/Discoverer
P:	1260.888	Orbital period (years)
a:	2.68488	Semi-major axis (arcseconds)
i:	145.5	Inclination (degrees)
Ω:	180.5	Longitude of ascending node (degrees)
T:	2078.309	Epoch of periastron passage (year)
e:	0.656	Eccentricity
ω:	75.1	Longitude of periastron (degrees)
Start-Year:	1394.556	Year
End-Year:	2655.444	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for AG366
Position:	185803.46+471130.1	Epoch-2000 right ascension and declination
WDS-ID:	18581+4711	WDS designation
Discoverer Code:	AG366	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.54	Magnitude of the primary
V2:	8.67	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	WSI2021	Reference

Double Star Orbit for AG366

WDS 6th Orbit including measures of AG366

-- 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 AG366

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.294   179.53
--------------------------
1394.56    3.737   293.30
1404.56    3.736   292.38
1414.56    3.734   291.46
1424.56    3.732   290.54
1434.56    3.728   289.62
1444.56    3.723   288.70
1454.56    3.717   287.77
1464.56    3.710   286.85
1474.56    3.702   285.91
1484.56    3.693   284.98
1494.56    3.682   284.04
1504.56    3.671   283.09
1514.56    3.659   282.14
1524.56    3.646   281.18
1534.56    3.631   280.21
1544.56    3.616   279.23
1554.56    3.600   278.25
1564.56    3.582   277.26
1574.56    3.564   276.25
1584.56    3.544   275.24
1594.56    3.524   274.22
1604.56    3.502   273.18
1614.56    3.480   272.13
1624.56    3.456   271.06
1634.56    3.432   269.98
1644.56    3.406   268.89
1654.56    3.379   267.78
1664.56    3.351   266.65
1674.56    3.323   265.50
1684.56    3.293   264.33
1694.56    3.262   263.13
1704.56    3.229   261.92
1714.56    3.196   260.68
1724.56    3.162   259.41
1734.56    3.126   258.12
1744.56    3.089   256.79
1754.56    3.051   255.43
1764.56    3.012   254.04
1774.56    2.972   252.61
1784.56    2.930   251.14
1794.56    2.887   249.63
1804.56    2.843   248.07
1814.56    2.797   246.46
1824.56    2.749   244.79
1834.56    2.701   243.07
1844.56    2.650   241.28
1854.56    2.598   239.42
1864.56    2.545   237.49
1874.56    2.489   235.46
1884.56    2.432   233.35
1894.56    2.372   231.13
1904.56    2.311   228.80
1914.56    2.247   226.33
1924.56    2.181   223.72
1934.56    2.112   220.94
1944.56    2.040   217.97
1954.56    1.965   214.77
1964.56    1.886   211.32
1974.56    1.804   207.56
1984.56    1.717   203.42
1994.56    1.625   198.84
2004.56    1.528   193.69
2014.56    1.425   187.81
2024.56    1.316   180.99
2034.56    1.201   172.90
2044.56    1.083   163.06
2054.56    0.966   150.81
2064.56    0.861   135.35
2074.56    0.788   116.30
2084.56    0.768    94.84
2094.56    0.810    74.01
2104.56    0.904    56.38
2114.56    1.026    42.53
2124.56    1.161    31.78
2134.56    1.299    23.29
2144.56    1.434    16.42
2154.56    1.564    10.72
2164.56    1.688     5.87
2174.56    1.805     1.68
2184.56    1.916   357.98
2194.56    2.022   354.67
2204.56    2.121   351.69
2214.56    2.216   348.97
2224.56    2.305   346.46
2234.56    2.390   344.14
2244.56    2.470   341.97
2254.56    2.547   339.94
2264.56    2.619   338.02
2274.56    2.688   336.20
2284.56    2.754   334.47
2294.56    2.817   332.82
2304.56    2.876   331.24
2314.56    2.933   329.72
2324.56    2.987   328.26
2334.56    3.038   326.85
2344.56    3.087   325.49
2354.56    3.134   324.16
2364.56    3.178   322.88
2374.56    3.220   321.63
2384.56    3.260   320.41
2394.56    3.298   319.22
2404.56    3.334   318.05
2414.56    3.368   316.91
2424.56    3.401   315.80
2434.56    3.431   314.70
2444.56    3.460   313.62
2454.56    3.488   312.56
2464.56    3.513   311.52
2474.56    3.537   310.49
2484.56    3.560   309.47
2494.56    3.581   308.46
2504.56    3.600   307.47
2514.56    3.618   306.49
2524.56    3.635   305.52
2534.56    3.650   304.55
2544.56    3.665   303.59
2554.56    3.677   302.64
2564.56    3.689   301.70
2574.56    3.699   300.76
2584.56    3.708   299.83
2594.56    3.715   298.90
2604.56    3.722   297.97
2614.56    3.727   297.05
2624.56    3.731   296.13
2634.56    3.734   295.21
2644.56    3.736   294.29
2654.56    3.737   293.38

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 17:57:46