Double Star Calculator - Orbit

Orbital Elements for AC11
WDS: AC11 WDS ID/Discoverer
P: 440.600 Orbital period (years)
a: 0.77 Semi-major axis (arcseconds)
i: 93.3 Inclination (degrees)
Ω: 176.3 Longitude of ascending node (degrees)
T: 1888.700 Epoch of periastron passage (year)
e: 0.47 Eccentricity
ω: 55.8 Longitude of periastron (degrees)
Start-Year: 1804.7 Year
End-Year: 2245.3 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for AC11
Position: 182457.21-013445.6 Epoch-2000 right ascension and declination
WDS-ID: 18250-0135 WDS designation
Discoverer Code: AC11 Discover designation and components
ADS number: 11324 Aitken Double Star catalog
HD number: 169493 HD catalog number
Hipparcos number: 90253 Hipparcos catalog number
V1: 6.71 Magnitude of the primary
V2: 7.21 Magnitude of the secondary
Equinox: Equinox
Date: 2021 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: Tok2021f Reference

Double Star Orbit for AC11



WDS 6th Orbit including measures of AC11

-- 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 AC11
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.911   354.68
--------------------------
1804.70    0.318   184.00
1805.70    0.324   183.76
1806.70    0.331   183.53
1807.70    0.337   183.31
1808.70    0.344   183.10
1809.70    0.350   182.89
1810.70    0.356   182.69
1811.70    0.362   182.50
1812.70    0.368   182.32
1813.70    0.374   182.14
1814.70    0.380   181.97
1815.70    0.386   181.80
1816.70    0.391   181.64
1817.70    0.397   181.48
1818.70    0.403   181.32
1819.70    0.408   181.17
1820.70    0.413   181.03
1821.70    0.419   180.89
1822.70    0.424   180.75
1823.70    0.429   180.61
1824.70    0.434   180.48
1825.70    0.439   180.35
1826.70    0.443   180.22
1827.70    0.448   180.10
1828.70    0.452   179.98
1829.70    0.457   179.86
1830.70    0.461   179.74
1831.70    0.465   179.63
1832.70    0.469   179.51
1833.70    0.472   179.40
1834.70    0.476   179.29
1835.70    0.479   179.19
1836.70    0.483   179.08
1837.70    0.486   178.97
1838.70    0.489   178.87
1839.70    0.491   178.77
1840.70    0.494   178.67
1841.70    0.496   178.57
1842.70    0.498   178.47
1843.70    0.500   178.37
1844.70    0.502   178.27
1845.70    0.503   178.17
1846.70    0.504   178.07
1847.70    0.505   177.98
1848.70    0.506   177.88
1849.70    0.506   177.78
1850.70    0.506   177.69
1851.70    0.506   177.59
1852.70    0.506   177.50
1853.70    0.505   177.40
1854.70    0.504   177.30
1855.70    0.502   177.21
1856.70    0.501   177.11
1857.70    0.499   177.01
1858.70    0.496   176.91
1859.70    0.493   176.81
1860.70    0.490   176.71
1861.70    0.487   176.60
1862.70    0.483   176.50
1863.70    0.479   176.39
1864.70    0.474   176.28
1865.70    0.469   176.17
1866.70    0.463   176.06
1867.70    0.457   175.94
1868.70    0.451   175.83
1869.70    0.444   175.70
1870.70    0.437   175.58
1871.70    0.429   175.44
1872.70    0.421   175.31
1873.70    0.412   175.17
1874.70    0.403   175.02
1875.70    0.394   174.86
1876.70    0.384   174.70
1877.70    0.373   174.53
1878.70    0.362   174.35
1879.70    0.351   174.15
1880.70    0.339   173.95
1881.70    0.327   173.72
1882.70    0.314   173.48
1883.70    0.301   173.22
1884.70    0.288   172.94
1885.70    0.274   172.63
1886.70    0.260   172.28
1887.70    0.245   171.89
1888.70    0.230   171.46
1889.70    0.215   170.96
1890.70    0.200   170.39
1891.70    0.184   169.72
1892.70    0.168   168.92
1893.70    0.152   167.96
1894.70    0.136   166.76
1895.70    0.119   165.24
1896.70    0.103   163.24
1897.70    0.087   160.47
1898.70    0.070   156.43
1899.70    0.055   150.03
1900.70    0.040   138.75
1901.70    0.029   116.85
1902.70    0.025    80.11
1903.70    0.032    47.75
1904.70    0.045    30.41
1905.70    0.060    21.25
1906.70    0.076    15.85
1907.70    0.092    12.33
1908.70    0.109     9.88
1909.70    0.125     8.07
1910.70    0.142     6.68
1911.70    0.158     5.58
1912.70    0.174     4.68
1913.70    0.190     3.94
1914.70    0.207     3.32
1915.70    0.222     2.78
1916.70    0.238     2.31
1917.70    0.254     1.91
1918.70    0.269     1.55
1919.70    0.284     1.23
1920.70    0.299     0.94
1921.70    0.314     0.67
1922.70    0.329     0.44
1923.70    0.343     0.22
1924.70    0.357     0.02
1925.70    0.371   359.83
1926.70    0.385   359.66
1927.70    0.399   359.50
1928.70    0.412   359.35
1929.70    0.425   359.21
1930.70    0.438   359.08
1931.70    0.451   358.95
1932.70    0.463   358.83
1933.70    0.476   358.72
1934.70    0.488   358.62
1935.70    0.500   358.52
1936.70    0.511   358.42
1937.70    0.523   358.33
1938.70    0.534   358.24
1939.70    0.545   358.15
1940.70    0.556   358.07
1941.70    0.566   357.99
1942.70    0.577   357.92
1943.70    0.587   357.85
1944.70    0.597   357.78
1945.70    0.607   357.71
1946.70    0.616   357.64
1947.70    0.626   357.58
1948.70    0.635   357.52
1949.70    0.644   357.46
1950.70    0.653   357.40
1951.70    0.661   357.34
1952.70    0.670   357.29
1953.70    0.678   357.23
1954.70    0.686   357.18
1955.70    0.694   357.13
1956.70    0.702   357.08
1957.70    0.710   357.03
1958.70    0.717   356.98
1959.70    0.724   356.93
1960.70    0.731   356.88
1961.70    0.738   356.84
1962.70    0.745   356.79
1963.70    0.752   356.75
1964.70    0.758   356.71
1965.70    0.764   356.66
1966.70    0.770   356.62
1967.70    0.776   356.58
1968.70    0.782   356.54
1969.70    0.788   356.50
1970.70    0.793   356.46
1971.70    0.799   356.42
1972.70    0.804   356.38
1973.70    0.809   356.35
1974.70    0.814   356.31
1975.70    0.819   356.27
1976.70    0.824   356.24
1977.70    0.828   356.20
1978.70    0.832   356.16
1979.70    0.837   356.13
1980.70    0.841   356.09
1981.70    0.845   356.06
1982.70    0.849   356.02
1983.70    0.852   355.99
1984.70    0.856   355.96
1985.70    0.860   355.92
1986.70    0.863   355.89
1987.70    0.866   355.86
1988.70    0.869   355.82
1989.70    0.872   355.79
1990.70    0.875   355.76
1991.70    0.878   355.73
1992.70    0.881   355.70
1993.70    0.883   355.66
1994.70    0.886   355.63
1995.70    0.888   355.60
1996.70    0.890   355.57
1997.70    0.892   355.54
1998.70    0.894   355.51
1999.70    0.896   355.48
2000.70    0.898   355.45
2001.70    0.900   355.42
2002.70    0.901   355.39
2003.70    0.903   355.36
2004.70    0.904   355.33
2005.70    0.905   355.30
2006.70    0.906   355.27
2007.70    0.908   355.24
2008.70    0.908   355.21
2009.70    0.909   355.18
2010.70    0.910   355.15
2011.70    0.911   355.12
2012.70    0.911   355.09
2013.70    0.912   355.06
2014.70    0.912   355.03
2015.70    0.913   355.00
2016.70    0.913   354.97
2017.70    0.913   354.94
2018.70    0.913   354.91
2019.70    0.913   354.88
2020.70    0.913   354.85
2021.70    0.913   354.82
2022.70    0.913   354.79
2023.70    0.912   354.76
2024.70    0.912   354.73
2025.70    0.911   354.70
2026.70    0.911   354.67
2027.70    0.910   354.64
2028.70    0.909   354.61
2029.70    0.908   354.58
2030.70    0.907   354.55
2031.70    0.906   354.52
2032.70    0.905   354.49
2033.70    0.904   354.46
2034.70    0.903   354.43
2035.70    0.901   354.40
2036.70    0.900   354.37
2037.70    0.899   354.34
2038.70    0.897   354.31
2039.70    0.895   354.28
2040.70    0.894   354.25
2041.70    0.892   354.22
2042.70    0.890   354.19
2043.70    0.888   354.16
2044.70    0.886   354.13
2045.70    0.884   354.10
2046.70    0.882   354.06
2047.70    0.880   354.03
2048.70    0.878   354.00
2049.70    0.876   353.97
2050.70    0.873   353.94
2051.70    0.871   353.90
2052.70    0.868   353.87
2053.70    0.866   353.84
2054.70    0.863   353.81
2055.70    0.860   353.77
2056.70    0.858   353.74
2057.70    0.855   353.71
2058.70    0.852   353.67
2059.70    0.849   353.64
2060.70    0.846   353.60
2061.70    0.843   353.57
2062.70    0.840   353.53
2063.70    0.837   353.50
2064.70    0.834   353.46
2065.70    0.830   353.43
2066.70    0.827   353.39
2067.70    0.823   353.36
2068.70    0.820   353.32
2069.70    0.817   353.28
2070.70    0.813   353.25
2071.70    0.809   353.21
2072.70    0.806   353.17
2073.70    0.802   353.13
2074.70    0.798   353.09
2075.70    0.794   353.06
2076.70    0.790   353.02
2077.70    0.786   352.98
2078.70    0.782   352.94
2079.70    0.778   352.90
2080.70    0.774   352.86
2081.70    0.770   352.81
2082.70    0.766   352.77
2083.70    0.762   352.73
2084.70    0.757   352.69
2085.70    0.753   352.64
2086.70    0.749   352.60
2087.70    0.744   352.56
2088.70    0.740   352.51
2089.70    0.735   352.47
2090.70    0.731   352.42
2091.70    0.726   352.37
2092.70    0.721   352.33
2093.70    0.716   352.28
2094.70    0.712   352.23
2095.70    0.707   352.18
2096.70    0.702   352.13
2097.70    0.697   352.08
2098.70    0.692   352.03
2099.70    0.687   351.98
2100.70    0.682   351.93
2101.70    0.677   351.87
2102.70    0.672   351.82
2103.70    0.667   351.76
2104.70    0.661   351.71
2105.70    0.656   351.65
2106.70    0.651   351.59
2107.70    0.646   351.54
2108.70    0.640   351.48
2109.70    0.635   351.42
2110.70    0.629   351.35
2111.70    0.624   351.29
2112.70    0.618   351.23
2113.70    0.613   351.16
2114.70    0.607   351.10
2115.70    0.601   351.03
2116.70    0.596   350.96
2117.70    0.590   350.89
2118.70    0.584   350.82
2119.70    0.578   350.75
2120.70    0.572   350.67
2121.70    0.567   350.60
2122.70    0.561   350.52
2123.70    0.555   350.44
2124.70    0.549   350.36
2125.70    0.543   350.28
2126.70    0.537   350.19
2127.70    0.531   350.10
2128.70    0.524   350.02
2129.70    0.518   349.93
2130.70    0.512   349.83
2131.70    0.506   349.74
2132.70    0.500   349.64
2133.70    0.493   349.54
2134.70    0.487   349.44
2135.70    0.481   349.33
2136.70    0.474   349.23
2137.70    0.468   349.11
2138.70    0.462   349.00
2139.70    0.455   348.88
2140.70    0.449   348.76
2141.70    0.442   348.64
2142.70    0.436   348.51
2143.70    0.429   348.38
2144.70    0.422   348.24
2145.70    0.416   348.10
2146.70    0.409   347.96
2147.70    0.402   347.81
2148.70    0.396   347.65
2149.70    0.389   347.49
2150.70    0.382   347.33
2151.70    0.375   347.16
2152.70    0.369   346.98
2153.70    0.362   346.80
2154.70    0.355   346.60
2155.70    0.348   346.40
2156.70    0.341   346.20
2157.70    0.334   345.98
2158.70    0.327   345.76
2159.70    0.321   345.52
2160.70    0.314   345.28
2161.70    0.307   345.02
2162.70    0.300   344.75
2163.70    0.293   344.47
2164.70    0.286   344.18
2165.70    0.279   343.87
2166.70    0.272   343.54
2167.70    0.265   343.20
2168.70    0.257   342.84
2169.70    0.250   342.46
2170.70    0.243   342.05
2171.70    0.236   341.63
2172.70    0.229   341.17
2173.70    0.222   340.69
2174.70    0.215   340.17
2175.70    0.208   339.62
2176.70    0.201   339.03
2177.70    0.194   338.40
2178.70    0.187   337.72
2179.70    0.180   336.98
2180.70    0.173   336.19
2181.70    0.166   335.33
2182.70    0.159   334.39
2183.70    0.152   333.36
2184.70    0.145   332.24
2185.70    0.138   331.01
2186.70    0.131   329.64
2187.70    0.124   328.13
2188.70    0.118   326.45
2189.70    0.111   324.56
2190.70    0.105   322.45
2191.70    0.098   320.06
2192.70    0.092   317.35
2193.70    0.086   314.26
2194.70    0.081   310.74
2195.70    0.076   306.71
2196.70    0.071   302.12
2197.70    0.067   296.89
2198.70    0.063   290.99
2199.70    0.060   284.44
2200.70    0.058   277.32
2201.70    0.057   269.79
2202.70    0.057   262.09
2203.70    0.057   254.48
2204.70    0.059   247.23
2205.70    0.062   240.51
2206.70    0.065   234.43
2207.70    0.070   229.01
2208.70    0.074   224.24
2209.70    0.079   220.06
2210.70    0.085   216.41
2211.70    0.091   213.21
2212.70    0.097   210.39
2213.70    0.103   207.92
2214.70    0.109   205.73
2215.70    0.116   203.78
2216.70    0.122   202.04
2217.70    0.129   200.48
2218.70    0.136   199.08
2219.70    0.143   197.81
2220.70    0.149   196.65
2221.70    0.156   195.60
2222.70    0.163   194.64
2223.70    0.170   193.75
2224.70    0.177   192.93
2225.70    0.184   192.18
2226.70    0.191   191.48
2227.70    0.198   190.83
2228.70    0.205   190.23
2229.70    0.212   189.66
2230.70    0.219   189.13
2231.70    0.226   188.64
2232.70    0.233   188.17
2233.70    0.240   187.73
2234.70    0.247   187.31
2235.70    0.254   186.92
2236.70    0.261   186.55
2237.70    0.267   186.20
2238.70    0.274   185.86
2239.70    0.281   185.54
2240.70    0.288   185.24
2241.70    0.294   184.94
2242.70    0.301   184.67
2243.70    0.308   184.40
2244.70    0.314   184.15






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 17:51:34



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