Double Star Calculator - Orbit

Orbital Elements for BU1158BC
WDS: BU1158BC WDS ID/Discoverer
P: 423.400 Orbital period (years)
a: 0.897 Semi-major axis (arcseconds)
i: 74.5 Inclination (degrees)
Ω: 169.8 Longitude of ascending node (degrees)
T: 1939.800 Epoch of periastron passage (year)
e: 0.359 Eccentricity
ω: 10.2 Longitude of periastron (degrees)
Start-Year: 1813.3 Year
End-Year: 2236.7 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU1158BC
Position: 003105.23-100501.9 Epoch-2000 right ascension and declination
WDS-ID: 00310-1005 WDS designation
Discoverer Code: BU1158BC Discover designation and components
ADS number: 426 Aitken Double Star catalog
HD number: 2761 HD catalog number
Hipparcos number: 2444 Hipparcos catalog number
V1: 9.69 Magnitude of the primary
V2: 9.09 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2017 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Doc2019a Reference

Double Star Orbit for BU1158BC



WDS 6th Orbit including measures of BU1158BC

-- 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 BU1158BC
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.567   329.01
--------------------------
1813.30    0.729     7.42
1814.30    0.720     7.75
1815.30    0.711     8.08
1816.30    0.701     8.42
1817.30    0.692     8.78
1818.30    0.682     9.14
1819.30    0.673     9.51
1820.30    0.663     9.89
1821.30    0.653    10.29
1822.30    0.644    10.69
1823.30    0.634    11.11
1824.30    0.624    11.54
1825.30    0.614    11.99
1826.30    0.604    12.45
1827.30    0.594    12.92
1828.30    0.584    13.41
1829.30    0.574    13.92
1830.30    0.564    14.45
1831.30    0.554    15.00
1832.30    0.544    15.56
1833.30    0.533    16.15
1834.30    0.523    16.76
1835.30    0.513    17.40
1836.30    0.503    18.06
1837.30    0.492    18.75
1838.30    0.482    19.47
1839.30    0.472    20.22
1840.30    0.461    21.00
1841.30    0.451    21.82
1842.30    0.441    22.68
1843.30    0.431    23.58
1844.30    0.420    24.52
1845.30    0.410    25.51
1846.30    0.400    26.55
1847.30    0.390    27.64
1848.30    0.380    28.79
1849.30    0.370    30.01
1850.30    0.361    31.29
1851.30    0.351    32.63
1852.30    0.341    34.06
1853.30    0.332    35.56
1854.30    0.323    37.16
1855.30    0.314    38.84
1856.30    0.305    40.62
1857.30    0.297    42.51
1858.30    0.288    44.50
1859.30    0.280    46.61
1860.30    0.273    48.85
1861.30    0.266    51.20
1862.30    0.259    53.69
1863.30    0.252    56.30
1864.30    0.247    59.04
1865.30    0.241    61.91
1866.30    0.236    64.90
1867.30    0.232    68.01
1868.30    0.229    71.22
1869.30    0.226    74.53
1870.30    0.224    77.90
1871.30    0.222    81.33
1872.30    0.222    84.79
1873.30    0.222    88.26
1874.30    0.223    91.71
1875.30    0.224    95.13
1876.30    0.227    98.48
1877.30    0.230   101.76
1878.30    0.233   104.95
1879.30    0.238   108.03
1880.30    0.243   110.99
1881.30    0.248   113.83
1882.30    0.254   116.54
1883.30    0.260   119.12
1884.30    0.267   121.58
1885.30    0.274   123.91
1886.30    0.282   126.12
1887.30    0.289   128.22
1888.30    0.297   130.20
1889.30    0.306   132.08
1890.30    0.314   133.85
1891.30    0.323   135.54
1892.30    0.331   137.13
1893.30    0.340   138.65
1894.30    0.349   140.08
1895.30    0.358   141.44
1896.30    0.367   142.74
1897.30    0.376   143.98
1898.30    0.385   145.15
1899.30    0.394   146.28
1900.30    0.403   147.35
1901.30    0.412   148.38
1902.30    0.421   149.36
1903.30    0.430   150.30
1904.30    0.438   151.21
1905.30    0.447   152.08
1906.30    0.455   152.92
1907.30    0.463   153.73
1908.30    0.471   154.51
1909.30    0.479   155.26
1910.30    0.487   156.00
1911.30    0.494   156.71
1912.30    0.501   157.40
1913.30    0.508   158.07
1914.30    0.515   158.72
1915.30    0.521   159.35
1916.30    0.527   159.97
1917.30    0.533   160.58
1918.30    0.539   161.17
1919.30    0.544   161.76
1920.30    0.549   162.33
1921.30    0.553   162.89
1922.30    0.558   163.44
1923.30    0.561   163.99
1924.30    0.565   164.53
1925.30    0.568   165.06
1926.30    0.571   165.59
1927.30    0.573   166.11
1928.30    0.575   166.63
1929.30    0.576   167.14
1930.30    0.577   167.65
1931.30    0.578   168.16
1932.30    0.578   168.67
1933.30    0.578   169.18
1934.30    0.578   169.70
1935.30    0.577   170.21
1936.30    0.575   170.72
1937.30    0.573   171.24
1938.30    0.571   171.76
1939.30    0.568   172.29
1940.30    0.565   172.82
1941.30    0.561   173.36
1942.30    0.557   173.90
1943.30    0.553   174.46
1944.30    0.548   175.02
1945.30    0.543   175.59
1946.30    0.537   176.18
1947.30    0.531   176.78
1948.30    0.525   177.39
1949.30    0.518   178.02
1950.30    0.511   178.66
1951.30    0.503   179.33
1952.30    0.496   180.01
1953.30    0.487   180.72
1954.30    0.479   181.45
1955.30    0.470   182.20
1956.30    0.461   182.99
1957.30    0.452   183.81
1958.30    0.443   184.66
1959.30    0.433   185.55
1960.30    0.423   186.48
1961.30    0.413   187.45
1962.30    0.403   188.48
1963.30    0.393   189.56
1964.30    0.382   190.69
1965.30    0.372   191.89
1966.30    0.361   193.16
1967.30    0.350   194.51
1968.30    0.340   195.94
1969.30    0.329   197.47
1970.30    0.319   199.10
1971.30    0.308   200.84
1972.30    0.298   202.70
1973.30    0.287   204.69
1974.30    0.277   206.83
1975.30    0.268   209.13
1976.30    0.258   211.60
1977.30    0.249   214.25
1978.30    0.241   217.09
1979.30    0.233   220.14
1980.30    0.225   223.40
1981.30    0.218   226.87
1982.30    0.212   230.56
1983.30    0.207   234.45
1984.30    0.203   238.52
1985.30    0.199   242.74
1986.30    0.197   247.09
1987.30    0.196   251.52
1988.30    0.196   255.98
1989.30    0.197   260.43
1990.30    0.199   264.80
1991.30    0.202   269.07
1992.30    0.206   273.18
1993.30    0.211   277.12
1994.30    0.217   280.86
1995.30    0.223   284.38
1996.30    0.231   287.69
1997.30    0.239   290.79
1998.30    0.248   293.68
1999.30    0.257   296.36
2000.30    0.266   298.86
2001.30    0.276   301.18
2002.30    0.286   303.34
2003.30    0.297   305.35
2004.30    0.308   307.21
2005.30    0.319   308.95
2006.30    0.330   310.57
2007.30    0.342   312.08
2008.30    0.353   313.50
2009.30    0.365   314.83
2010.30    0.376   316.07
2011.30    0.388   317.24
2012.30    0.400   318.34
2013.30    0.412   319.37
2014.30    0.424   320.35
2015.30    0.435   321.28
2016.30    0.447   322.15
2017.30    0.459   322.98
2018.30    0.471   323.77
2019.30    0.483   324.52
2020.30    0.495   325.24
2021.30    0.506   325.92
2022.30    0.518   326.57
2023.30    0.530   327.19
2024.30    0.541   327.78
2025.30    0.553   328.35
2026.30    0.565   328.90
2027.30    0.576   329.42
2028.30    0.587   329.93
2029.30    0.599   330.41
2030.30    0.610   330.88
2031.30    0.621   331.33
2032.30    0.632   331.77
2033.30    0.643   332.19
2034.30    0.654   332.59
2035.30    0.665   332.99
2036.30    0.675   333.37
2037.30    0.686   333.73
2038.30    0.697   334.09
2039.30    0.707   334.44
2040.30    0.717   334.77
2041.30    0.728   335.10
2042.30    0.738   335.42
2043.30    0.748   335.73
2044.30    0.758   336.03
2045.30    0.768   336.32
2046.30    0.777   336.61
2047.30    0.787   336.89
2048.30    0.796   337.16
2049.30    0.806   337.43
2050.30    0.815   337.69
2051.30    0.824   337.94
2052.30    0.834   338.19
2053.30    0.843   338.43
2054.30    0.851   338.67
2055.30    0.860   338.90
2056.30    0.869   339.13
2057.30    0.878   339.35
2058.30    0.886   339.57
2059.30    0.894   339.79
2060.30    0.903   340.00
2061.30    0.911   340.21
2062.30    0.919   340.41
2063.30    0.927   340.61
2064.30    0.935   340.81
2065.30    0.942   341.00
2066.30    0.950   341.19
2067.30    0.957   341.38
2068.30    0.965   341.57
2069.30    0.972   341.75
2070.30    0.979   341.93
2071.30    0.986   342.10
2072.30    0.993   342.28
2073.30    1.000   342.45
2074.30    1.007   342.62
2075.30    1.013   342.79
2076.30    1.020   342.95
2077.30    1.026   343.11
2078.30    1.033   343.27
2079.30    1.039   343.43
2080.30    1.045   343.59
2081.30    1.051   343.75
2082.30    1.057   343.90
2083.30    1.062   344.05
2084.30    1.068   344.20
2085.30    1.074   344.35
2086.30    1.079   344.50
2087.30    1.084   344.64
2088.30    1.089   344.79
2089.30    1.095   344.93
2090.30    1.100   345.07
2091.30    1.104   345.21
2092.30    1.109   345.35
2093.30    1.114   345.49
2094.30    1.118   345.63
2095.30    1.123   345.76
2096.30    1.127   345.90
2097.30    1.131   346.03
2098.30    1.135   346.17
2099.30    1.139   346.30
2100.30    1.143   346.43
2101.30    1.147   346.56
2102.30    1.151   346.69
2103.30    1.154   346.82
2104.30    1.158   346.94
2105.30    1.161   347.07
2106.30    1.164   347.20
2107.30    1.167   347.32
2108.30    1.170   347.45
2109.30    1.173   347.57
2110.30    1.176   347.70
2111.30    1.179   347.82
2112.30    1.181   347.94
2113.30    1.184   348.06
2114.30    1.186   348.19
2115.30    1.189   348.31
2116.30    1.191   348.43
2117.30    1.193   348.55
2118.30    1.195   348.67
2119.30    1.197   348.79
2120.30    1.198   348.91
2121.30    1.200   349.02
2122.30    1.202   349.14
2123.30    1.203   349.26
2124.30    1.204   349.38
2125.30    1.206   349.50
2126.30    1.207   349.61
2127.30    1.208   349.73
2128.30    1.209   349.85
2129.30    1.209   349.96
2130.30    1.210   350.08
2131.30    1.211   350.20
2132.30    1.211   350.31
2133.30    1.212   350.43
2134.30    1.212   350.55
2135.30    1.212   350.66
2136.30    1.212   350.78
2137.30    1.212   350.89
2138.30    1.212   351.01
2139.30    1.212   351.13
2140.30    1.212   351.24
2141.30    1.211   351.36
2142.30    1.211   351.47
2143.30    1.210   351.59
2144.30    1.209   351.71
2145.30    1.209   351.82
2146.30    1.208   351.94
2147.30    1.207   352.06
2148.30    1.205   352.18
2149.30    1.204   352.29
2150.30    1.203   352.41
2151.30    1.201   352.53
2152.30    1.200   352.65
2153.30    1.198   352.77
2154.30    1.197   352.89
2155.30    1.195   353.00
2156.30    1.193   353.12
2157.30    1.191   353.24
2158.30    1.189   353.37
2159.30    1.186   353.49
2160.30    1.184   353.61
2161.30    1.182   353.73
2162.30    1.179   353.85
2163.30    1.176   353.97
2164.30    1.174   354.10
2165.30    1.171   354.22
2166.30    1.168   354.35
2167.30    1.165   354.47
2168.30    1.162   354.60
2169.30    1.159   354.73
2170.30    1.155   354.85
2171.30    1.152   354.98
2172.30    1.148   355.11
2173.30    1.145   355.24
2174.30    1.141   355.37
2175.30    1.137   355.50
2176.30    1.133   355.63
2177.30    1.129   355.77
2178.30    1.125   355.90
2179.30    1.121   356.04
2180.30    1.117   356.17
2181.30    1.113   356.31
2182.30    1.108   356.45
2183.30    1.104   356.59
2184.30    1.099   356.73
2185.30    1.094   356.87
2186.30    1.089   357.01
2187.30    1.084   357.16
2188.30    1.079   357.30
2189.30    1.074   357.45
2190.30    1.069   357.60
2191.30    1.064   357.75
2192.30    1.058   357.90
2193.30    1.053   358.06
2194.30    1.047   358.21
2195.30    1.041   358.37
2196.30    1.036   358.53
2197.30    1.030   358.69
2198.30    1.024   358.85
2199.30    1.018   359.01
2200.30    1.012   359.18
2201.30    1.005   359.34
2202.30    0.999   359.51
2203.30    0.993   359.69
2204.30    0.986   359.86
2205.30    0.980     0.04
2206.30    0.973     0.22
2207.30    0.966     0.40
2208.30    0.959     0.58
2209.30    0.952     0.77
2210.30    0.945     0.96
2211.30    0.938     1.15
2212.30    0.931     1.35
2213.30    0.924     1.54
2214.30    0.916     1.75
2215.30    0.909     1.95
2216.30    0.901     2.16
2217.30    0.893     2.37
2218.30    0.886     2.59
2219.30    0.878     2.81
2220.30    0.870     3.03
2221.30    0.862     3.26
2222.30    0.854     3.49
2223.30    0.846     3.73
2224.30    0.838     3.97
2225.30    0.829     4.21
2226.30    0.821     4.46
2227.30    0.812     4.72
2228.30    0.804     4.98
2229.30    0.795     5.25
2230.30    0.787     5.52
2231.30    0.778     5.80
2232.30    0.769     6.08
2233.30    0.760     6.38
2234.30    0.751     6.68
2235.30    0.742     6.98
2236.30    0.733     7.30






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 14:40:02



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