Double Star Calculator - Orbit

Orbital Elements for BU766AB
WDS: BU766AB WDS ID/Discoverer
P: 464.660 Orbital period (years)
a: 0.836 Semi-major axis (arcseconds)
i: 111.8 Inclination (degrees)
Ω: 113.8 Longitude of ascending node (degrees)
T: 2042.140 Epoch of periastron passage (year)
e: 0.201 Eccentricity
ω: 315.3 Longitude of periastron (degrees)
Start-Year: 1792.67 Year
End-Year: 2257.33 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU766AB
Position: 212424.80-410024.1 Epoch-2000 right ascension and declination
WDS-ID: 21244-4100 WDS designation
Discoverer Code: BU766AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 203585 HD catalog number
Hipparcos number: 105696 Hipparcos catalog number
V1: 6.24 Magnitude of the primary
V2: 6.88 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1999 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: Zir2010 Reference

Double Star Orbit for BU766AB



WDS 6th Orbit including measures of BU766AB

-- 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 BU766AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.377   150.11
--------------------------
1792.67    0.664   320.65
1793.67    0.670   320.21
1794.67    0.675   319.77
1795.67    0.681   319.34
1796.67    0.687   318.92
1797.67    0.693   318.51
1798.67    0.699   318.10
1799.67    0.705   317.70
1800.67    0.710   317.31
1801.67    0.716   316.92
1802.67    0.722   316.54
1803.67    0.727   316.17
1804.67    0.733   315.80
1805.67    0.738   315.43
1806.67    0.744   315.07
1807.67    0.749   314.72
1808.67    0.754   314.37
1809.67    0.760   314.03
1810.67    0.765   313.69
1811.67    0.770   313.35
1812.67    0.775   313.02
1813.67    0.780   312.70
1814.67    0.785   312.38
1815.67    0.790   312.06
1816.67    0.795   311.74
1817.67    0.800   311.43
1818.67    0.805   311.13
1819.67    0.809   310.83
1820.67    0.814   310.53
1821.67    0.819   310.23
1822.67    0.823   309.94
1823.67    0.827   309.65
1824.67    0.832   309.36
1825.67    0.836   309.08
1826.67    0.840   308.80
1827.67    0.845   308.52
1828.67    0.849   308.25
1829.67    0.853   307.98
1830.67    0.857   307.71
1831.67    0.861   307.44
1832.67    0.864   307.17
1833.67    0.868   306.91
1834.67    0.872   306.65
1835.67    0.875   306.39
1836.67    0.879   306.14
1837.67    0.882   305.88
1838.67    0.886   305.63
1839.67    0.889   305.38
1840.67    0.892   305.13
1841.67    0.895   304.89
1842.67    0.898   304.64
1843.67    0.901   304.40
1844.67    0.904   304.16
1845.67    0.907   303.91
1846.67    0.910   303.68
1847.67    0.912   303.44
1848.67    0.915   303.20
1849.67    0.917   302.97
1850.67    0.919   302.73
1851.67    0.922   302.50
1852.67    0.924   302.27
1853.67    0.926   302.04
1854.67    0.928   301.81
1855.67    0.930   301.58
1856.67    0.932   301.36
1857.67    0.934   301.13
1858.67    0.935   300.90
1859.67    0.937   300.68
1860.67    0.938   300.45
1861.67    0.940   300.23
1862.67    0.941   300.01
1863.67    0.942   299.79
1864.67    0.943   299.56
1865.67    0.944   299.34
1866.67    0.945   299.12
1867.67    0.946   298.90
1868.67    0.946   298.68
1869.67    0.947   298.46
1870.67    0.948   298.24
1871.67    0.948   298.02
1872.67    0.948   297.80
1873.67    0.948   297.58
1874.67    0.949   297.37
1875.67    0.949   297.15
1876.67    0.948   296.93
1877.67    0.948   296.71
1878.67    0.948   296.49
1879.67    0.948   296.27
1880.67    0.947   296.05
1881.67    0.946   295.83
1882.67    0.946   295.61
1883.67    0.945   295.39
1884.67    0.944   295.17
1885.67    0.943   294.95
1886.67    0.942   294.73
1887.67    0.941   294.50
1888.67    0.939   294.28
1889.67    0.938   294.06
1890.67    0.936   293.83
1891.67    0.935   293.61
1892.67    0.933   293.38
1893.67    0.931   293.16
1894.67    0.929   292.93
1895.67    0.927   292.70
1896.67    0.925   292.47
1897.67    0.922   292.24
1898.67    0.920   292.01
1899.67    0.917   291.77
1900.67    0.915   291.54
1901.67    0.912   291.30
1902.67    0.909   291.06
1903.67    0.906   290.82
1904.67    0.903   290.58
1905.67    0.900   290.34
1906.67    0.896   290.10
1907.67    0.893   289.85
1908.67    0.889   289.60
1909.67    0.886   289.35
1910.67    0.882   289.10
1911.67    0.878   288.85
1912.67    0.874   288.59
1913.67    0.870   288.33
1914.67    0.866   288.07
1915.67    0.861   287.80
1916.67    0.857   287.54
1917.67    0.853   287.27
1918.67    0.848   287.00
1919.67    0.843   286.72
1920.67    0.838   286.44
1921.67    0.833   286.16
1922.67    0.828   285.87
1923.67    0.823   285.58
1924.67    0.818   285.29
1925.67    0.812   285.00
1926.67    0.807   284.69
1927.67    0.801   284.39
1928.67    0.795   284.08
1929.67    0.789   283.77
1930.67    0.783   283.45
1931.67    0.777   283.12
1932.67    0.771   282.80
1933.67    0.765   282.46
1934.67    0.758   282.12
1935.67    0.752   281.78
1936.67    0.745   281.42
1937.67    0.738   281.07
1938.67    0.732   280.70
1939.67    0.725   280.33
1940.67    0.718   279.95
1941.67    0.711   279.57
1942.67    0.703   279.17
1943.67    0.696   278.77
1944.67    0.689   278.36
1945.67    0.681   277.94
1946.67    0.674   277.51
1947.67    0.666   277.07
1948.67    0.658   276.62
1949.67    0.650   276.16
1950.67    0.642   275.69
1951.67    0.634   275.20
1952.67    0.626   274.71
1953.67    0.618   274.20
1954.67    0.610   273.68
1955.67    0.601   273.14
1956.67    0.593   272.59
1957.67    0.584   272.02
1958.67    0.576   271.43
1959.67    0.567   270.83
1960.67    0.559   270.21
1961.67    0.550   269.57
1962.67    0.541   268.91
1963.67    0.532   268.22
1964.67    0.523   267.51
1965.67    0.515   266.78
1966.67    0.506   266.03
1967.67    0.497   265.24
1968.67    0.488   264.43
1969.67    0.479   263.59
1970.67    0.470   262.71
1971.67    0.461   261.80
1972.67    0.452   260.86
1973.67    0.443   259.87
1974.67    0.434   258.85
1975.67    0.425   257.78
1976.67    0.416   256.67
1977.67    0.408   255.51
1978.67    0.399   254.30
1979.67    0.390   253.03
1980.67    0.382   251.71
1981.67    0.374   250.33
1982.67    0.365   248.89
1983.67    0.357   247.38
1984.67    0.349   245.80
1985.67    0.341   244.14
1986.67    0.334   242.42
1987.67    0.327   240.61
1988.67    0.319   238.72
1989.67    0.313   236.75
1990.67    0.306   234.69
1991.67    0.300   232.54
1992.67    0.294   230.31
1993.67    0.289   227.99
1994.67    0.284   225.58
1995.67    0.279   223.09
1996.67    0.275   220.52
1997.67    0.271   217.88
1998.67    0.268   215.17
1999.67    0.265   212.40
2000.67    0.263   209.59
2001.67    0.262   206.73
2002.67    0.261   203.85
2003.67    0.261   200.95
2004.67    0.261   198.05
2005.67    0.262   195.17
2006.67    0.263   192.31
2007.67    0.265   189.49
2008.67    0.268   186.71
2009.67    0.271   183.99
2010.67    0.274   181.34
2011.67    0.278   178.76
2012.67    0.283   176.26
2013.67    0.288   173.84
2014.67    0.293   171.51
2015.67    0.299   169.26
2016.67    0.305   167.10
2017.67    0.311   165.02
2018.67    0.318   163.03
2019.67    0.325   161.12
2020.67    0.332   159.30
2021.67    0.339   157.55
2022.67    0.347   155.88
2023.67    0.355   154.28
2024.67    0.362   152.74
2025.67    0.370   151.28
2026.67    0.379   149.87
2027.67    0.387   148.53
2028.67    0.395   147.24
2029.67    0.403   146.00
2030.67    0.412   144.81
2031.67    0.420   143.67
2032.67    0.428   142.58
2033.67    0.437   141.52
2034.67    0.445   140.51
2035.67    0.453   139.53
2036.67    0.462   138.59
2037.67    0.470   137.68
2038.67    0.478   136.80
2039.67    0.486   135.96
2040.67    0.494   135.14
2041.67    0.502   134.34
2042.67    0.510   133.57
2043.67    0.518   132.83
2044.67    0.525   132.10
2045.67    0.533   131.40
2046.67    0.541   130.72
2047.67    0.548   130.05
2048.67    0.555   129.40
2049.67    0.562   128.77
2050.67    0.569   128.16
2051.67    0.576   127.56
2052.67    0.583   126.97
2053.67    0.589   126.40
2054.67    0.596   125.84
2055.67    0.602   125.29
2056.67    0.608   124.75
2057.67    0.614   124.22
2058.67    0.620   123.70
2059.67    0.625   123.19
2060.67    0.631   122.69
2061.67    0.636   122.20
2062.67    0.641   121.72
2063.67    0.646   121.24
2064.67    0.651   120.77
2065.67    0.655   120.31
2066.67    0.659   119.86
2067.67    0.664   119.41
2068.67    0.668   118.96
2069.67    0.671   118.52
2070.67    0.675   118.09
2071.67    0.679   117.66
2072.67    0.682   117.23
2073.67    0.685   116.81
2074.67    0.688   116.39
2075.67    0.691   115.98
2076.67    0.693   115.57
2077.67    0.695   115.16
2078.67    0.698   114.75
2079.67    0.700   114.35
2080.67    0.701   113.95
2081.67    0.703   113.55
2082.67    0.704   113.15
2083.67    0.706   112.75
2084.67    0.707   112.36
2085.67    0.708   111.96
2086.67    0.708   111.57
2087.67    0.709   111.18
2088.67    0.709   110.79
2089.67    0.709   110.39
2090.67    0.709   110.00
2091.67    0.709   109.61
2092.67    0.709   109.22
2093.67    0.708   108.83
2094.67    0.708   108.43
2095.67    0.707   108.04
2096.67    0.706   107.65
2097.67    0.705   107.25
2098.67    0.703   106.85
2099.67    0.702   106.45
2100.67    0.700   106.05
2101.67    0.699   105.65
2102.67    0.697   105.25
2103.67    0.695   104.84
2104.67    0.692   104.43
2105.67    0.690   104.02
2106.67    0.688   103.60
2107.67    0.685   103.18
2108.67    0.682   102.76
2109.67    0.679   102.34
2110.67    0.676   101.91
2111.67    0.673   101.47
2112.67    0.670   101.04
2113.67    0.666   100.60
2114.67    0.663   100.15
2115.67    0.659    99.70
2116.67    0.656    99.24
2117.67    0.652    98.78
2118.67    0.648    98.32
2119.67    0.644    97.84
2120.67    0.640    97.37
2121.67    0.635    96.88
2122.67    0.631    96.39
2123.67    0.627    95.89
2124.67    0.622    95.39
2125.67    0.618    94.87
2126.67    0.613    94.35
2127.67    0.608    93.83
2128.67    0.603    93.29
2129.67    0.598    92.74
2130.67    0.593    92.19
2131.67    0.588    91.62
2132.67    0.583    91.05
2133.67    0.578    90.46
2134.67    0.573    89.87
2135.67    0.568    89.26
2136.67    0.562    88.65
2137.67    0.557    88.02
2138.67    0.552    87.38
2139.67    0.546    86.72
2140.67    0.541    86.06
2141.67    0.535    85.38
2142.67    0.530    84.68
2143.67    0.524    83.97
2144.67    0.519    83.25
2145.67    0.513    82.51
2146.67    0.508    81.75
2147.67    0.502    80.98
2148.67    0.497    80.19
2149.67    0.491    79.38
2150.67    0.485    78.55
2151.67    0.480    77.71
2152.67    0.474    76.84
2153.67    0.469    75.96
2154.67    0.464    75.05
2155.67    0.458    74.12
2156.67    0.453    73.18
2157.67    0.448    72.20
2158.67    0.442    71.21
2159.67    0.437    70.19
2160.67    0.432    69.15
2161.67    0.427    68.08
2162.67    0.422    66.99
2163.67    0.418    65.87
2164.67    0.413    64.73
2165.67    0.408    63.56
2166.67    0.404    62.37
2167.67    0.399    61.15
2168.67    0.395    59.90
2169.67    0.391    58.62
2170.67    0.387    57.32
2171.67    0.383    55.99
2172.67    0.379    54.63
2173.67    0.376    53.25
2174.67    0.372    51.84
2175.67    0.369    50.41
2176.67    0.366    48.96
2177.67    0.363    47.48
2178.67    0.361    45.97
2179.67    0.358    44.45
2180.67    0.356    42.91
2181.67    0.354    41.35
2182.67    0.352    39.77
2183.67    0.351    38.17
2184.67    0.349    36.57
2185.67    0.348    34.95
2186.67    0.347    33.32
2187.67    0.347    31.68
2188.67    0.346    30.04
2189.67    0.346    28.40
2190.67    0.346    26.76
2191.67    0.347    25.12
2192.67    0.347    23.48
2193.67    0.348    21.85
2194.67    0.349    20.22
2195.67    0.350    18.61
2196.67    0.352    17.01
2197.67    0.353    15.43
2198.67    0.355    13.86
2199.67    0.357    12.30
2200.67    0.360    10.77
2201.67    0.362     9.26
2202.67    0.365     7.77
2203.67    0.368     6.30
2204.67    0.371     4.86
2205.67    0.375     3.45
2206.67    0.378     2.05
2207.67    0.382     0.69
2208.67    0.386   359.35
2209.67    0.390   358.04
2210.67    0.394   356.76
2211.67    0.398   355.50
2212.67    0.403   354.27
2213.67    0.407   353.07
2214.67    0.412   351.90
2215.67    0.417   350.75
2216.67    0.422   349.63
2217.67    0.427   348.53
2218.67    0.432   347.46
2219.67    0.437   346.42
2220.67    0.443   345.40
2221.67    0.448   344.41
2222.67    0.453   343.44
2223.67    0.459   342.49
2224.67    0.465   341.57
2225.67    0.470   340.67
2226.67    0.476   339.79
2227.67    0.482   338.93
2228.67    0.488   338.09
2229.67    0.494   337.28
2230.67    0.500   336.48
2231.67    0.506   335.70
2232.67    0.512   334.94
2233.67    0.518   334.20
2234.67    0.524   333.47
2235.67    0.530   332.76
2236.67    0.536   332.07
2237.67    0.543   331.39
2238.67    0.549   330.73
2239.67    0.555   330.09
2240.67    0.561   329.45
2241.67    0.567   328.83
2242.67    0.574   328.23
2243.67    0.580   327.64
2244.67    0.586   327.06
2245.67    0.592   326.49
2246.67    0.598   325.93
2247.67    0.605   325.39
2248.67    0.611   324.86
2249.67    0.617   324.33
2250.67    0.623   323.82
2251.67    0.629   323.32
2252.67    0.635   322.83
2253.67    0.642   322.34
2254.67    0.648   321.87
2255.67    0.654   321.40
2256.67    0.660   320.95






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 18:26:10



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