Double Star Calculator - Orbit

Orbital Elements for AC2AB
WDS: AC2AB WDS ID/Discoverer
P: 385.879 Orbital period (years)
a: 1.17441 Semi-major axis (arcseconds)
i: 64.035 Inclination (degrees)
Ω: 68.018 Longitude of ascending node (degrees)
T: 1889.510 Epoch of periastron passage (year)
e: 0.21372 Eccentricity
ω: 69.87 Longitude of periastron (degrees)
Start-Year: 1832.0606 Year
End-Year: 2217.9394 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for AC2AB
Position: 031822.43-005549.0 Epoch-2000 right ascension and declination
WDS-ID: 03184-0056 WDS designation
Discoverer Code: AC2AB Discover designation and components
ADS number: 2459 Aitken Double Star catalog
HD number: 20559 HD catalog number
Hipparcos number: 15383 Hipparcos catalog number
V1: 5.60 Magnitude of the primary
V2: 7.97 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 AC2AB



WDS 6th Orbit including measures of AC2AB

-- 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 AC2AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.171   264.51
--------------------------
1832.06    1.061    65.17
1833.06    1.059    65.65
1834.06    1.057    66.15
1835.06    1.054    66.64
1836.06    1.050    67.14
1837.06    1.047    67.64
1838.06    1.043    68.14
1839.06    1.039    68.65
1840.06    1.034    69.16
1841.06    1.030    69.68
1842.06    1.024    70.20
1843.06    1.019    70.73
1844.06    1.013    71.26
1845.06    1.007    71.80
1846.06    1.001    72.35
1847.06    0.994    72.90
1848.06    0.987    73.46
1849.06    0.980    74.03
1850.06    0.972    74.61
1851.06    0.964    75.19
1852.06    0.956    75.79
1853.06    0.947    76.40
1854.06    0.938    77.02
1855.06    0.929    77.65
1856.06    0.919    78.30
1857.06    0.909    78.95
1858.06    0.899    79.63
1859.06    0.889    80.32
1860.06    0.878    81.02
1861.06    0.867    81.74
1862.06    0.856    82.48
1863.06    0.844    83.25
1864.06    0.832    84.03
1865.06    0.820    84.84
1866.06    0.808    85.67
1867.06    0.796    86.52
1868.06    0.783    87.41
1869.06    0.770    88.32
1870.06    0.757    89.26
1871.06    0.743    90.24
1872.06    0.730    91.26
1873.06    0.716    92.31
1874.06    0.703    93.40
1875.06    0.689    94.54
1876.06    0.675    95.72
1877.06    0.661    96.96
1878.06    0.647    98.24
1879.06    0.633    99.59
1880.06    0.619   100.99
1881.06    0.605   102.46
1882.06    0.591   104.00
1883.06    0.577   105.61
1884.06    0.564   107.30
1885.06    0.551   109.08
1886.06    0.538   110.94
1887.06    0.525   112.89
1888.06    0.512   114.94
1889.06    0.500   117.08
1890.06    0.489   119.33
1891.06    0.478   121.69
1892.06    0.467   124.16
1893.06    0.458   126.73
1894.06    0.448   129.42
1895.06    0.440   132.20
1896.06    0.433   135.10
1897.06    0.426   138.08
1898.06    0.421   141.15
1899.06    0.416   144.30
1900.06    0.412   147.51
1901.06    0.410   150.76
1902.06    0.409   154.05
1903.06    0.409   157.35
1904.06    0.410   160.64
1905.06    0.412   163.90
1906.06    0.415   167.13
1907.06    0.419   170.29
1908.06    0.424   173.39
1909.06    0.431   176.40
1910.06    0.438   179.32
1911.06    0.446   182.14
1912.06    0.455   184.85
1913.06    0.465   187.45
1914.06    0.475   189.95
1915.06    0.486   192.33
1916.06    0.498   194.61
1917.06    0.510   196.78
1918.06    0.522   198.85
1919.06    0.535   200.82
1920.06    0.548   202.69
1921.06    0.562   204.48
1922.06    0.576   206.18
1923.06    0.590   207.80
1924.06    0.604   209.35
1925.06    0.618   210.82
1926.06    0.633   212.23
1927.06    0.647   213.57
1928.06    0.662   214.86
1929.06    0.677   216.08
1930.06    0.691   217.26
1931.06    0.706   218.39
1932.06    0.721   219.47
1933.06    0.735   220.51
1934.06    0.750   221.51
1935.06    0.764   222.47
1936.06    0.778   223.40
1937.06    0.792   224.29
1938.06    0.806   225.15
1939.06    0.820   225.98
1940.06    0.834   226.78
1941.06    0.848   227.56
1942.06    0.861   228.32
1943.06    0.874   229.05
1944.06    0.887   229.76
1945.06    0.900   230.45
1946.06    0.913   231.12
1947.06    0.925   231.77
1948.06    0.938   232.40
1949.06    0.950   233.02
1950.06    0.962   233.62
1951.06    0.973   234.21
1952.06    0.985   234.78
1953.06    0.996   235.34
1954.06    1.007   235.89
1955.06    1.017   236.43
1956.06    1.028   236.96
1957.06    1.038   237.47
1958.06    1.048   237.98
1959.06    1.058   238.48
1960.06    1.067   238.96
1961.06    1.076   239.44
1962.06    1.085   239.91
1963.06    1.094   240.38
1964.06    1.102   240.83
1965.06    1.110   241.28
1966.06    1.118   241.73
1967.06    1.126   242.16
1968.06    1.134   242.60
1969.06    1.141   243.02
1970.06    1.148   243.44
1971.06    1.154   243.86
1972.06    1.161   244.27
1973.06    1.167   244.67
1974.06    1.173   245.08
1975.06    1.179   245.47
1976.06    1.184   245.87
1977.06    1.189   246.26
1978.06    1.194   246.65
1979.06    1.199   247.03
1980.06    1.203   247.41
1981.06    1.207   247.79
1982.06    1.211   248.17
1983.06    1.215   248.54
1984.06    1.218   248.91
1985.06    1.222   249.28
1986.06    1.225   249.65
1987.06    1.227   250.02
1988.06    1.230   250.38
1989.06    1.232   250.75
1990.06    1.234   251.11
1991.06    1.236   251.47
1992.06    1.238   251.83
1993.06    1.239   252.19
1994.06    1.240   252.54
1995.06    1.241   252.90
1996.06    1.242   253.26
1997.06    1.243   253.61
1998.06    1.243   253.97
1999.06    1.243   254.33
2000.06    1.243   254.68
2001.06    1.243   255.04
2002.06    1.242   255.40
2003.06    1.241   255.75
2004.06    1.240   256.11
2005.06    1.239   256.47
2006.06    1.238   256.83
2007.06    1.236   257.19
2008.06    1.235   257.55
2009.06    1.233   257.91
2010.06    1.231   258.27
2011.06    1.228   258.64
2012.06    1.226   259.00
2013.06    1.223   259.37
2014.06    1.220   259.74
2015.06    1.217   260.11
2016.06    1.214   260.48
2017.06    1.211   260.85
2018.06    1.207   261.23
2019.06    1.204   261.61
2020.06    1.200   261.99
2021.06    1.196   262.37
2022.06    1.192   262.76
2023.06    1.187   263.15
2024.06    1.183   263.54
2025.06    1.178   263.94
2026.06    1.173   264.33
2027.06    1.168   264.74
2028.06    1.163   265.14
2029.06    1.158   265.55
2030.06    1.153   265.96
2031.06    1.147   266.38
2032.06    1.142   266.80
2033.06    1.136   267.22
2034.06    1.130   267.65
2035.06    1.124   268.08
2036.06    1.118   268.52
2037.06    1.112   268.96
2038.06    1.106   269.41
2039.06    1.099   269.86
2040.06    1.093   270.32
2041.06    1.086   270.79
2042.06    1.079   271.26
2043.06    1.072   271.73
2044.06    1.065   272.21
2045.06    1.058   272.70
2046.06    1.051   273.20
2047.06    1.044   273.70
2048.06    1.037   274.21
2049.06    1.029   274.72
2050.06    1.022   275.25
2051.06    1.014   275.78
2052.06    1.006   276.32
2053.06    0.999   276.86
2054.06    0.991   277.42
2055.06    0.983   277.99
2056.06    0.975   278.56
2057.06    0.967   279.14
2058.06    0.960   279.74
2059.06    0.952   280.34
2060.06    0.944   280.95
2061.06    0.935   281.57
2062.06    0.927   282.21
2063.06    0.919   282.85
2064.06    0.911   283.51
2065.06    0.903   284.18
2066.06    0.895   284.86
2067.06    0.887   285.56
2068.06    0.878   286.26
2069.06    0.870   286.98
2070.06    0.862   287.72
2071.06    0.854   288.46
2072.06    0.846   289.23
2073.06    0.838   290.00
2074.06    0.830   290.79
2075.06    0.822   291.60
2076.06    0.814   292.42
2077.06    0.806   293.26
2078.06    0.798   294.12
2079.06    0.790   294.99
2080.06    0.782   295.88
2081.06    0.775   296.79
2082.06    0.767   297.72
2083.06    0.760   298.66
2084.06    0.752   299.62
2085.06    0.745   300.61
2086.06    0.738   301.61
2087.06    0.731   302.63
2088.06    0.724   303.67
2089.06    0.717   304.73
2090.06    0.710   305.81
2091.06    0.704   306.91
2092.06    0.698   308.03
2093.06    0.691   309.17
2094.06    0.685   310.33
2095.06    0.680   311.52
2096.06    0.674   312.72
2097.06    0.669   313.94
2098.06    0.663   315.18
2099.06    0.658   316.44
2100.06    0.654   317.72
2101.06    0.649   319.02
2102.06    0.645   320.33
2103.06    0.641   321.66
2104.06    0.637   323.01
2105.06    0.633   324.38
2106.06    0.630   325.76
2107.06    0.627   327.15
2108.06    0.624   328.55
2109.06    0.622   329.97
2110.06    0.620   331.40
2111.06    0.618   332.83
2112.06    0.616   334.28
2113.06    0.615   335.73
2114.06    0.614   337.19
2115.06    0.614   338.65
2116.06    0.613   340.11
2117.06    0.613   341.57
2118.06    0.614   343.04
2119.06    0.614   344.50
2120.06    0.615   345.95
2121.06    0.616   347.41
2122.06    0.618   348.85
2123.06    0.619   350.29
2124.06    0.621   351.72
2125.06    0.624   353.14
2126.06    0.626   354.55
2127.06    0.629   355.95
2128.06    0.632   357.33
2129.06    0.636   358.70
2130.06    0.639     0.06
2131.06    0.643     1.39
2132.06    0.647     2.72
2133.06    0.652     4.02
2134.06    0.656     5.31
2135.06    0.661     6.57
2136.06    0.666     7.82
2137.06    0.671     9.05
2138.06    0.677    10.26
2139.06    0.683    11.46
2140.06    0.688    12.63
2141.06    0.694    13.78
2142.06    0.700    14.91
2143.06    0.707    16.02
2144.06    0.713    17.12
2145.06    0.719    18.19
2146.06    0.726    19.24
2147.06    0.733    20.28
2148.06    0.740    21.29
2149.06    0.746    22.29
2150.06    0.754    23.27
2151.06    0.761    24.23
2152.06    0.768    25.17
2153.06    0.775    26.10
2154.06    0.782    27.00
2155.06    0.790    27.89
2156.06    0.797    28.77
2157.06    0.804    29.63
2158.06    0.812    30.47
2159.06    0.819    31.30
2160.06    0.826    32.11
2161.06    0.834    32.91
2162.06    0.841    33.70
2163.06    0.849    34.47
2164.06    0.856    35.22
2165.06    0.863    35.97
2166.06    0.871    36.70
2167.06    0.878    37.42
2168.06    0.885    38.13
2169.06    0.892    38.83
2170.06    0.899    39.51
2171.06    0.906    40.19
2172.06    0.913    40.85
2173.06    0.920    41.51
2174.06    0.927    42.15
2175.06    0.934    42.79
2176.06    0.940    43.41
2177.06    0.947    44.03
2178.06    0.953    44.64
2179.06    0.960    45.24
2180.06    0.966    45.84
2181.06    0.972    46.42
2182.06    0.978    47.00
2183.06    0.984    47.57
2184.06    0.989    48.14
2185.06    0.995    48.70
2186.06    1.000    49.25
2187.06    1.005    49.80
2188.06    1.010    50.34
2189.06    1.015    50.88
2190.06    1.020    51.41
2191.06    1.024    51.94
2192.06    1.029    52.46
2193.06    1.033    52.98
2194.06    1.037    53.49
2195.06    1.040    54.00
2196.06    1.044    54.51
2197.06    1.047    55.01
2198.06    1.050    55.51
2199.06    1.053    56.01
2200.06    1.056    56.50
2201.06    1.058    57.00
2202.06    1.061    57.49
2203.06    1.063    57.97
2204.06    1.064    58.46
2205.06    1.066    58.95
2206.06    1.067    59.43
2207.06    1.068    59.91
2208.06    1.069    60.39
2209.06    1.069    60.88
2210.06    1.070    61.36
2211.06    1.070    61.84
2212.06    1.069    62.32
2213.06    1.069    62.80
2214.06    1.068    63.28
2215.06    1.066    63.77
2216.06    1.065    64.25
2217.06    1.063    64.74






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 15:09:32



www.stella-vega.de