Double Star Calculator - Orbit

Orbital Elements for BU239
WDS: BU239 WDS ID/Discoverer
P: 429.190 Orbital period (years)
a: 0.836 Semi-major axis (arcseconds)
i: 66.9 Inclination (degrees)
Ω: 126.6 Longitude of ascending node (degrees)
T: 2217.250 Epoch of periastron passage (year)
e: 0.337 Eccentricity
ω: 75.5 Longitude of periastron (degrees)
Start-Year: 1810.405 Year
End-Year: 2239.595 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU239
Position: 145839.26-273926.3 Epoch-2000 right ascension and declination
WDS-ID: 14587-2739 WDS designation
Discoverer Code: BU239 Discover designation and components
ADS number: 9453 Aitken Double Star catalog
HD number: 132219 HD catalog number
Hipparcos number: 73284 Hipparcos catalog number
V1: 6.17 Magnitude of the primary
V2: 6.79 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1998 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: Lin1998a Reference

Double Star Orbit for BU239



WDS 6th Orbit including measures of BU239

-- 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 BU239
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.440    26.73
--------------------------
1810.40    0.319   265.38
1811.40    0.330   267.44
1812.40    0.341   269.37
1813.40    0.353   271.16
1814.40    0.364   272.85
1815.40    0.376   274.43
1816.40    0.388   275.92
1817.40    0.400   277.31
1818.40    0.411   278.63
1819.40    0.423   279.88
1820.40    0.435   281.05
1821.40    0.446   282.17
1822.40    0.458   283.23
1823.40    0.469   284.23
1824.40    0.481   285.19
1825.40    0.492   286.11
1826.40    0.503   286.98
1827.40    0.514   287.82
1828.40    0.525   288.62
1829.40    0.536   289.39
1830.40    0.547   290.13
1831.40    0.557   290.84
1832.40    0.567   291.52
1833.40    0.578   292.19
1834.40    0.588   292.82
1835.40    0.597   293.44
1836.40    0.607   294.04
1837.40    0.616   294.62
1838.40    0.626   295.18
1839.40    0.635   295.72
1840.40    0.644   296.25
1841.40    0.652   296.77
1842.40    0.661   297.27
1843.40    0.669   297.76
1844.40    0.677   298.24
1845.40    0.685   298.71
1846.40    0.693   299.16
1847.40    0.701   299.61
1848.40    0.708   300.04
1849.40    0.715   300.47
1850.40    0.723   300.89
1851.40    0.729   301.30
1852.40    0.736   301.70
1853.40    0.743   302.10
1854.40    0.749   302.49
1855.40    0.755   302.87
1856.40    0.761   303.25
1857.40    0.767   303.62
1858.40    0.772   303.99
1859.40    0.778   304.35
1860.40    0.783   304.70
1861.40    0.788   305.05
1862.40    0.793   305.40
1863.40    0.798   305.74
1864.40    0.803   306.08
1865.40    0.807   306.41
1866.40    0.811   306.74
1867.40    0.815   307.07
1868.40    0.819   307.40
1869.40    0.823   307.72
1870.40    0.827   308.03
1871.40    0.830   308.35
1872.40    0.833   308.66
1873.40    0.836   308.97
1874.40    0.839   309.28
1875.40    0.842   309.59
1876.40    0.845   309.89
1877.40    0.848   310.20
1878.40    0.850   310.50
1879.40    0.852   310.80
1880.40    0.854   311.09
1881.40    0.856   311.39
1882.40    0.858   311.68
1883.40    0.860   311.98
1884.40    0.861   312.27
1885.40    0.863   312.56
1886.40    0.864   312.85
1887.40    0.865   313.14
1888.40    0.866   313.43
1889.40    0.867   313.72
1890.40    0.868   314.01
1891.40    0.869   314.29
1892.40    0.869   314.58
1893.40    0.870   314.87
1894.40    0.870   315.15
1895.40    0.870   315.44
1896.40    0.870   315.72
1897.40    0.870   316.01
1898.40    0.870   316.30
1899.40    0.870   316.58
1900.40    0.869   316.87
1901.40    0.869   317.16
1902.40    0.868   317.44
1903.40    0.867   317.73
1904.40    0.867   318.02
1905.40    0.866   318.31
1906.40    0.865   318.60
1907.40    0.864   318.89
1908.40    0.862   319.18
1909.40    0.861   319.47
1910.40    0.860   319.76
1911.40    0.858   320.06
1912.40    0.857   320.35
1913.40    0.855   320.65
1914.40    0.853   320.94
1915.40    0.851   321.24
1916.40    0.849   321.54
1917.40    0.847   321.84
1918.40    0.845   322.14
1919.40    0.843   322.45
1920.40    0.841   322.75
1921.40    0.838   323.06
1922.40    0.836   323.37
1923.40    0.833   323.68
1924.40    0.831   323.99
1925.40    0.828   324.31
1926.40    0.825   324.62
1927.40    0.823   324.94
1928.40    0.820   325.26
1929.40    0.817   325.59
1930.40    0.814   325.91
1931.40    0.811   326.24
1932.40    0.807   326.57
1933.40    0.804   326.91
1934.40    0.801   327.24
1935.40    0.798   327.58
1936.40    0.794   327.92
1937.40    0.791   328.27
1938.40    0.787   328.62
1939.40    0.784   328.97
1940.40    0.780   329.32
1941.40    0.776   329.68
1942.40    0.773   330.04
1943.40    0.769   330.40
1944.40    0.765   330.77
1945.40    0.761   331.15
1946.40    0.757   331.52
1947.40    0.753   331.90
1948.40    0.749   332.28
1949.40    0.745   332.67
1950.40    0.741   333.06
1951.40    0.737   333.46
1952.40    0.733   333.86
1953.40    0.728   334.27
1954.40    0.724   334.68
1955.40    0.720   335.09
1956.40    0.716   335.51
1957.40    0.711   335.94
1958.40    0.707   336.37
1959.40    0.702   336.81
1960.40    0.698   337.25
1961.40    0.693   337.70
1962.40    0.689   338.15
1963.40    0.684   338.61
1964.40    0.680   339.07
1965.40    0.675   339.55
1966.40    0.671   340.02
1967.40    0.666   340.51
1968.40    0.662   341.00
1969.40    0.657   341.50
1970.40    0.652   342.00
1971.40    0.648   342.52
1972.40    0.643   343.04
1973.40    0.638   343.56
1974.40    0.634   344.10
1975.40    0.629   344.64
1976.40    0.624   345.19
1977.40    0.620   345.75
1978.40    0.615   346.32
1979.40    0.610   346.90
1980.40    0.606   347.48
1981.40    0.601   348.08
1982.40    0.596   348.68
1983.40    0.592   349.30
1984.40    0.587   349.92
1985.40    0.583   350.55
1986.40    0.578   351.20
1987.40    0.573   351.85
1988.40    0.569   352.51
1989.40    0.564   353.19
1990.40    0.560   353.87
1991.40    0.556   354.57
1992.40    0.551   355.28
1993.40    0.547   355.99
1994.40    0.542   356.72
1995.40    0.538   357.47
1996.40    0.534   358.22
1997.40    0.530   358.99
1998.40    0.526   359.76
1999.40    0.521     0.55
2000.40    0.517     1.36
2001.40    0.513     2.17
2002.40    0.509     3.00
2003.40    0.506     3.84
2004.40    0.502     4.69
2005.40    0.498     5.56
2006.40    0.494     6.44
2007.40    0.491     7.33
2008.40    0.487     8.24
2009.40    0.484     9.16
2010.40    0.481    10.09
2011.40    0.477    11.03
2012.40    0.474    11.99
2013.40    0.471    12.96
2014.40    0.468    13.94
2015.40    0.465    14.94
2016.40    0.462    15.94
2017.40    0.460    16.96
2018.40    0.457    17.99
2019.40    0.455    19.04
2020.40    0.452    20.09
2021.40    0.450    21.15
2022.40    0.448    22.23
2023.40    0.446    23.31
2024.40    0.444    24.41
2025.40    0.442    25.51
2026.40    0.440    26.62
2027.40    0.439    27.74
2028.40    0.437    28.87
2029.40    0.436    30.01
2030.40    0.435    31.15
2031.40    0.434    32.30
2032.40    0.433    33.45
2033.40    0.432    34.60
2034.40    0.432    35.76
2035.40    0.431    36.92
2036.40    0.431    38.09
2037.40    0.431    39.25
2038.40    0.431    40.42
2039.40    0.431    41.59
2040.40    0.431    42.75
2041.40    0.432    43.92
2042.40    0.432    45.08
2043.40    0.433    46.24
2044.40    0.433    47.39
2045.40    0.434    48.54
2046.40    0.435    49.69
2047.40    0.437    50.83
2048.40    0.438    51.96
2049.40    0.439    53.08
2050.40    0.441    54.20
2051.40    0.442    55.31
2052.40    0.444    56.41
2053.40    0.446    57.51
2054.40    0.448    58.59
2055.40    0.450    59.66
2056.40    0.453    60.72
2057.40    0.455    61.78
2058.40    0.457    62.82
2059.40    0.460    63.85
2060.40    0.463    64.86
2061.40    0.465    65.87
2062.40    0.468    66.86
2063.40    0.471    67.85
2064.40    0.474    68.81
2065.40    0.477    69.77
2066.40    0.480    70.72
2067.40    0.484    71.65
2068.40    0.487    72.57
2069.40    0.490    73.47
2070.40    0.494    74.37
2071.40    0.498    75.25
2072.40    0.501    76.12
2073.40    0.505    76.97
2074.40    0.508    77.82
2075.40    0.512    78.65
2076.40    0.516    79.47
2077.40    0.520    80.27
2078.40    0.524    81.07
2079.40    0.528    81.85
2080.40    0.532    82.62
2081.40    0.536    83.38
2082.40    0.540    84.13
2083.40    0.544    84.87
2084.40    0.548    85.60
2085.40    0.552    86.31
2086.40    0.556    87.02
2087.40    0.560    87.72
2088.40    0.564    88.40
2089.40    0.568    89.08
2090.40    0.573    89.74
2091.40    0.577    90.40
2092.40    0.581    91.04
2093.40    0.585    91.68
2094.40    0.589    92.31
2095.40    0.593    92.93
2096.40    0.597    93.54
2097.40    0.601    94.14
2098.40    0.606    94.74
2099.40    0.610    95.32
2100.40    0.614    95.90
2101.40    0.618    96.47
2102.40    0.622    97.04
2103.40    0.626    97.59
2104.40    0.629    98.14
2105.40    0.633    98.69
2106.40    0.637    99.22
2107.40    0.641    99.75
2108.40    0.645   100.28
2109.40    0.648   100.80
2110.40    0.652   101.31
2111.40    0.656   101.81
2112.40    0.659   102.32
2113.40    0.663   102.81
2114.40    0.666   103.30
2115.40    0.670   103.79
2116.40    0.673   104.27
2117.40    0.676   104.74
2118.40    0.679   105.22
2119.40    0.682   105.68
2120.40    0.685   106.15
2121.40    0.688   106.60
2122.40    0.691   107.06
2123.40    0.694   107.51
2124.40    0.697   107.96
2125.40    0.699   108.40
2126.40    0.702   108.84
2127.40    0.704   109.28
2128.40    0.706   109.72
2129.40    0.709   110.15
2130.40    0.711   110.58
2131.40    0.713   111.01
2132.40    0.715   111.43
2133.40    0.716   111.86
2134.40    0.718   112.28
2135.40    0.720   112.70
2136.40    0.721   113.11
2137.40    0.722   113.53
2138.40    0.723   113.94
2139.40    0.724   114.36
2140.40    0.725   114.77
2141.40    0.726   115.18
2142.40    0.727   115.59
2143.40    0.727   116.00
2144.40    0.728   116.41
2145.40    0.728   116.82
2146.40    0.728   117.23
2147.40    0.728   117.64
2148.40    0.727   118.05
2149.40    0.727   118.45
2150.40    0.726   118.86
2151.40    0.726   119.28
2152.40    0.725   119.69
2153.40    0.723   120.10
2154.40    0.722   120.52
2155.40    0.721   120.93
2156.40    0.719   121.35
2157.40    0.717   121.77
2158.40    0.715   122.19
2159.40    0.713   122.62
2160.40    0.710   123.04
2161.40    0.708   123.47
2162.40    0.705   123.91
2163.40    0.702   124.35
2164.40    0.699   124.79
2165.40    0.695   125.23
2166.40    0.691   125.68
2167.40    0.688   126.14
2168.40    0.683   126.60
2169.40    0.679   127.07
2170.40    0.674   127.54
2171.40    0.670   128.02
2172.40    0.665   128.51
2173.40    0.659   129.00
2174.40    0.654   129.50
2175.40    0.648   130.01
2176.40    0.642   130.53
2177.40    0.636   131.06
2178.40    0.629   131.60
2179.40    0.623   132.16
2180.40    0.616   132.72
2181.40    0.609   133.30
2182.40    0.601   133.89
2183.40    0.594   134.50
2184.40    0.586   135.12
2185.40    0.578   135.76
2186.40    0.569   136.42
2187.40    0.561   137.10
2188.40    0.552   137.80
2189.40    0.543   138.52
2190.40    0.533   139.27
2191.40    0.524   140.04
2192.40    0.514   140.85
2193.40    0.504   141.68
2194.40    0.494   142.55
2195.40    0.484   143.46
2196.40    0.474   144.40
2197.40    0.463   145.39
2198.40    0.452   146.42
2199.40    0.441   147.51
2200.40    0.430   148.65
2201.40    0.419   149.85
2202.40    0.408   151.12
2203.40    0.397   152.46
2204.40    0.385   153.87
2205.40    0.374   155.38
2206.40    0.363   156.97
2207.40    0.351   158.68
2208.40    0.340   160.49
2209.40    0.329   162.43
2210.40    0.318   164.50
2211.40    0.307   166.71
2212.40    0.297   169.09
2213.40    0.287   171.63
2214.40    0.277   174.36
2215.40    0.268   177.28
2216.40    0.259   180.41
2217.40    0.251   183.74
2218.40    0.244   187.28
2219.40    0.237   191.03
2220.40    0.231   194.98
2221.40    0.227   199.11
2222.40    0.223   203.40
2223.40    0.221   207.80
2224.40    0.219   212.28
2225.40    0.219   216.78
2226.40    0.220   221.27
2227.40    0.223   225.69
2228.40    0.226   230.00
2229.40    0.230   234.16
2230.40    0.236   238.15
2231.40    0.242   241.94
2232.40    0.250   245.52
2233.40    0.258   248.89
2234.40    0.266   252.05
2235.40    0.275   255.01
2236.40    0.285   257.77
2237.40    0.295   260.34
2238.40    0.306   262.74
2239.40    0.317   264.97






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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Report created: 2026-06-25 17:11:18



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