Double Star Calculator - Orbit

Orbital Elements for BU701AB
WDS: BU701AB WDS ID/Discoverer
P: 554.460 Orbital period (years)
a: 1.4 Semi-major axis (arcseconds)
i: 124.1 Inclination (degrees)
Ω: 118.1 Longitude of ascending node (degrees)
T: 2288.310 Epoch of periastron passage (year)
e: 0.139 Eccentricity
ω: 105.4 Longitude of periastron (degrees)
Start-Year: 1747.77 Year
End-Year: 2302.23 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU701AB
Position: 222807.24+121455.5 Epoch-2000 right ascension and declination
WDS-ID: 22281+1215 WDS designation
Discoverer Code: BU701AB Discover designation and components
ADS number: 15962 Aitken Double Star catalog
HD number: 212989 HD catalog number
Hipparcos number: 110900 Hipparcos catalog number
V1: 7.34 Magnitude of the primary
V2: 9.62 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: Flags
Ephemerides: Ephemerides
Code: Cve2005 Reference

Double Star Orbit for BU701AB



WDS 6th Orbit including measures of BU701AB

-- 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 BU701AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.031   170.90
--------------------------
1747.77    0.820   345.28
1748.77    0.828   344.24
1749.77    0.836   343.22
1750.77    0.844   342.22
1751.77    0.852   341.23
1752.77    0.860   340.27
1753.77    0.869   339.32
1754.77    0.877   338.40
1755.77    0.885   337.49
1756.77    0.894   336.59
1757.77    0.902   335.72
1758.77    0.911   334.86
1759.77    0.919   334.01
1760.77    0.928   333.19
1761.77    0.937   332.37
1762.77    0.945   331.58
1763.77    0.954   330.79
1764.77    0.962   330.02
1765.77    0.971   329.27
1766.77    0.980   328.52
1767.77    0.988   327.79
1768.77    0.997   327.08
1769.77    1.005   326.37
1770.77    1.013   325.68
1771.77    1.022   324.99
1772.77    1.030   324.32
1773.77    1.038   323.66
1774.77    1.047   323.01
1775.77    1.055   322.37
1776.77    1.063   321.74
1777.77    1.071   321.12
1778.77    1.079   320.51
1779.77    1.086   319.91
1780.77    1.094   319.31
1781.77    1.102   318.73
1782.77    1.109   318.15
1783.77    1.117   317.58
1784.77    1.124   317.02
1785.77    1.132   316.46
1786.77    1.139   315.91
1787.77    1.146   315.37
1788.77    1.153   314.84
1789.77    1.160   314.31
1790.77    1.167   313.78
1791.77    1.173   313.27
1792.77    1.180   312.76
1793.77    1.186   312.25
1794.77    1.192   311.75
1795.77    1.199   311.26
1796.77    1.205   310.77
1797.77    1.211   310.29
1798.77    1.217   309.81
1799.77    1.222   309.33
1800.77    1.228   308.86
1801.77    1.233   308.39
1802.77    1.239   307.93
1803.77    1.244   307.47
1804.77    1.249   307.02
1805.77    1.254   306.57
1806.77    1.259   306.12
1807.77    1.263   305.67
1808.77    1.268   305.23
1809.77    1.272   304.79
1810.77    1.276   304.36
1811.77    1.281   303.93
1812.77    1.285   303.50
1813.77    1.288   303.07
1814.77    1.292   302.65
1815.77    1.296   302.22
1816.77    1.299   301.80
1817.77    1.302   301.39
1818.77    1.306   300.97
1819.77    1.309   300.56
1820.77    1.312   300.15
1821.77    1.314   299.74
1822.77    1.317   299.33
1823.77    1.319   298.92
1824.77    1.322   298.52
1825.77    1.324   298.11
1826.77    1.326   297.71
1827.77    1.328   297.31
1828.77    1.330   296.91
1829.77    1.332   296.51
1830.77    1.333   296.11
1831.77    1.334   295.72
1832.77    1.336   295.32
1833.77    1.337   294.92
1834.77    1.338   294.53
1835.77    1.339   294.13
1836.77    1.340   293.74
1837.77    1.340   293.35
1838.77    1.341   292.95
1839.77    1.341   292.56
1840.77    1.341   292.17
1841.77    1.341   291.77
1842.77    1.341   291.38
1843.77    1.341   290.99
1844.77    1.341   290.60
1845.77    1.341   290.20
1846.77    1.340   289.81
1847.77    1.340   289.42
1848.77    1.339   289.02
1849.77    1.338   288.63
1850.77    1.337   288.23
1851.77    1.336   287.84
1852.77    1.335   287.44
1853.77    1.333   287.04
1854.77    1.332   286.65
1855.77    1.330   286.25
1856.77    1.329   285.85
1857.77    1.327   285.45
1858.77    1.325   285.05
1859.77    1.323   284.64
1860.77    1.321   284.24
1861.77    1.319   283.83
1862.77    1.317   283.43
1863.77    1.314   283.02
1864.77    1.312   282.61
1865.77    1.309   282.20
1866.77    1.306   281.78
1867.77    1.304   281.37
1868.77    1.301   280.95
1869.77    1.298   280.53
1870.77    1.295   280.11
1871.77    1.292   279.69
1872.77    1.288   279.27
1873.77    1.285   278.84
1874.77    1.282   278.41
1875.77    1.278   277.98
1876.77    1.275   277.54
1877.77    1.271   277.11
1878.77    1.267   276.67
1879.77    1.264   276.23
1880.77    1.260   275.78
1881.77    1.256   275.34
1882.77    1.252   274.89
1883.77    1.248   274.44
1884.77    1.244   273.98
1885.77    1.239   273.52
1886.77    1.235   273.06
1887.77    1.231   272.60
1888.77    1.226   272.13
1889.77    1.222   271.66
1890.77    1.218   271.18
1891.77    1.213   270.70
1892.77    1.208   270.22
1893.77    1.204   269.74
1894.77    1.199   269.25
1895.77    1.194   268.75
1896.77    1.190   268.26
1897.77    1.185   267.75
1898.77    1.180   267.25
1899.77    1.175   266.74
1900.77    1.170   266.23
1901.77    1.165   265.71
1902.77    1.160   265.18
1903.77    1.155   264.66
1904.77    1.150   264.13
1905.77    1.145   263.59
1906.77    1.140   263.05
1907.77    1.135   262.50
1908.77    1.130   261.95
1909.77    1.125   261.40
1910.77    1.120   260.83
1911.77    1.115   260.27
1912.77    1.109   259.70
1913.77    1.104   259.12
1914.77    1.099   258.54
1915.77    1.094   257.95
1916.77    1.089   257.36
1917.77    1.084   256.76
1918.77    1.079   256.15
1919.77    1.073   255.54
1920.77    1.068   254.93
1921.77    1.063   254.31
1922.77    1.058   253.68
1923.77    1.053   253.04
1924.77    1.048   252.40
1925.77    1.043   251.76
1926.77    1.038   251.11
1927.77    1.033   250.45
1928.77    1.028   249.78
1929.77    1.024   249.11
1930.77    1.019   248.43
1931.77    1.014   247.75
1932.77    1.009   247.06
1933.77    1.005   246.36
1934.77    1.000   245.66
1935.77    0.996   244.95
1936.77    0.991   244.23
1937.77    0.987   243.51
1938.77    0.982   242.78
1939.77    0.978   242.05
1940.77    0.974   241.31
1941.77    0.970   240.56
1942.77    0.966   239.80
1943.77    0.962   239.04
1944.77    0.958   238.27
1945.77    0.954   237.50
1946.77    0.950   236.72
1947.77    0.946   235.93
1948.77    0.943   235.14
1949.77    0.939   234.34
1950.77    0.936   233.54
1951.77    0.933   232.73
1952.77    0.929   231.92
1953.77    0.926   231.10
1954.77    0.923   230.27
1955.77    0.920   229.44
1956.77    0.918   228.60
1957.77    0.915   227.76
1958.77    0.913   226.91
1959.77    0.910   226.06
1960.77    0.908   225.21
1961.77    0.906   224.35
1962.77    0.904   223.49
1963.77    0.902   222.62
1964.77    0.900   221.75
1965.77    0.898   220.87
1966.77    0.897   220.00
1967.77    0.895   219.12
1968.77    0.894   218.23
1969.77    0.893   217.35
1970.77    0.892   216.46
1971.77    0.891   215.57
1972.77    0.890   214.68
1973.77    0.890   213.79
1974.77    0.889   212.89
1975.77    0.889   212.00
1976.77    0.889   211.10
1977.77    0.888   210.21
1978.77    0.889   209.31
1979.77    0.889   208.42
1980.77    0.889   207.53
1981.77    0.890   206.63
1982.77    0.890   205.74
1983.77    0.891   204.85
1984.77    0.892   203.96
1985.77    0.893   203.07
1986.77    0.894   202.19
1987.77    0.895   201.31
1988.77    0.897   200.43
1989.77    0.898   199.55
1990.77    0.900   198.67
1991.77    0.902   197.80
1992.77    0.904   196.94
1993.77    0.906   196.07
1994.77    0.908   195.22
1995.77    0.911   194.36
1996.77    0.913   193.51
1997.77    0.916   192.67
1998.77    0.918   191.83
1999.77    0.921   190.99
2000.77    0.924   190.16
2001.77    0.927   189.34
2002.77    0.930   188.52
2003.77    0.933   187.70
2004.77    0.937   186.89
2005.77    0.940   186.09
2006.77    0.944   185.30
2007.77    0.947   184.51
2008.77    0.951   183.72
2009.77    0.955   182.94
2010.77    0.959   182.17
2011.77    0.963   181.41
2012.77    0.967   180.65
2013.77    0.971   179.90
2014.77    0.976   179.15
2015.77    0.980   178.41
2016.77    0.985   177.68
2017.77    0.989   176.96
2018.77    0.994   176.24
2019.77    0.998   175.52
2020.77    1.003   174.82
2021.77    1.008   174.12
2022.77    1.013   173.43
2023.77    1.018   172.74
2024.77    1.023   172.06
2025.77    1.028   171.39
2026.77    1.033   170.72
2027.77    1.038   170.06
2028.77    1.043   169.41
2029.77    1.048   168.77
2030.77    1.053   168.13
2031.77    1.059   167.49
2032.77    1.064   166.86
2033.77    1.069   166.24
2034.77    1.075   165.63
2035.77    1.080   165.02
2036.77    1.085   164.42
2037.77    1.091   163.82
2038.77    1.096   163.23
2039.77    1.102   162.64
2040.77    1.107   162.07
2041.77    1.113   161.49
2042.77    1.119   160.93
2043.77    1.124   160.36
2044.77    1.130   159.81
2045.77    1.135   159.26
2046.77    1.141   158.71
2047.77    1.146   158.17
2048.77    1.152   157.63
2049.77    1.157   157.10
2050.77    1.163   156.58
2051.77    1.169   156.06
2052.77    1.174   155.54
2053.77    1.180   155.03
2054.77    1.185   154.53
2055.77    1.191   154.03
2056.77    1.196   153.53
2057.77    1.202   153.04
2058.77    1.207   152.55
2059.77    1.212   152.07
2060.77    1.218   151.59
2061.77    1.223   151.12
2062.77    1.229   150.65
2063.77    1.234   150.18
2064.77    1.239   149.72
2065.77    1.244   149.26
2066.77    1.250   148.81
2067.77    1.255   148.36
2068.77    1.260   147.91
2069.77    1.265   147.47
2070.77    1.270   147.03
2071.77    1.275   146.59
2072.77    1.280   146.16
2073.77    1.285   145.73
2074.77    1.290   145.30
2075.77    1.295   144.88
2076.77    1.299   144.46
2077.77    1.304   144.04
2078.77    1.309   143.63
2079.77    1.313   143.22
2080.77    1.318   142.81
2081.77    1.322   142.40
2082.77    1.327   142.00
2083.77    1.331   141.60
2084.77    1.335   141.20
2085.77    1.340   140.81
2086.77    1.344   140.41
2087.77    1.348   140.02
2088.77    1.352   139.64
2089.77    1.356   139.25
2090.77    1.360   138.87
2091.77    1.364   138.49
2092.77    1.368   138.11
2093.77    1.371   137.73
2094.77    1.375   137.36
2095.77    1.378   136.98
2096.77    1.382   136.61
2097.77    1.385   136.24
2098.77    1.388   135.88
2099.77    1.392   135.51
2100.77    1.395   135.15
2101.77    1.398   134.79
2102.77    1.401   134.42
2103.77    1.404   134.06
2104.77    1.406   133.71
2105.77    1.409   133.35
2106.77    1.412   133.00
2107.77    1.414   132.64
2108.77    1.417   132.29
2109.77    1.419   131.94
2110.77    1.421   131.59
2111.77    1.423   131.24
2112.77    1.425   130.89
2113.77    1.427   130.54
2114.77    1.429   130.20
2115.77    1.431   129.85
2116.77    1.433   129.51
2117.77    1.434   129.16
2118.77    1.436   128.82
2119.77    1.437   128.48
2120.77    1.438   128.13
2121.77    1.439   127.79
2122.77    1.440   127.45
2123.77    1.441   127.11
2124.77    1.442   126.77
2125.77    1.443   126.43
2126.77    1.444   126.09
2127.77    1.444   125.75
2128.77    1.444   125.42
2129.77    1.445   125.08
2130.77    1.445   124.74
2131.77    1.445   124.40
2132.77    1.445   124.06
2133.77    1.445   123.72
2134.77    1.445   123.39
2135.77    1.444   123.05
2136.77    1.444   122.71
2137.77    1.443   122.37
2138.77    1.442   122.03
2139.77    1.441   121.69
2140.77    1.441   121.35
2141.77    1.439   121.01
2142.77    1.438   120.67
2143.77    1.437   120.33
2144.77    1.435   119.98
2145.77    1.434   119.64
2146.77    1.432   119.30
2147.77    1.430   118.95
2148.77    1.429   118.60
2149.77    1.427   118.26
2150.77    1.424   117.91
2151.77    1.422   117.56
2152.77    1.420   117.21
2153.77    1.417   116.86
2154.77    1.415   116.51
2155.77    1.412   116.15
2156.77    1.409   115.80
2157.77    1.406   115.44
2158.77    1.403   115.08
2159.77    1.400   114.72
2160.77    1.396   114.36
2161.77    1.393   114.00
2162.77    1.389   113.63
2163.77    1.385   113.27
2164.77    1.381   112.90
2165.77    1.377   112.53
2166.77    1.373   112.15
2167.77    1.369   111.78
2168.77    1.365   111.40
2169.77    1.360   111.02
2170.77    1.356   110.64
2171.77    1.351   110.25
2172.77    1.346   109.86
2173.77    1.341   109.47
2174.77    1.336   109.08
2175.77    1.331   108.68
2176.77    1.326   108.28
2177.77    1.320   107.87
2178.77    1.315   107.47
2179.77    1.309   107.06
2180.77    1.303   106.64
2181.77    1.297   106.22
2182.77    1.291   105.80
2183.77    1.285   105.38
2184.77    1.279   104.95
2185.77    1.273   104.51
2186.77    1.266   104.08
2187.77    1.260   103.63
2188.77    1.253   103.18
2189.77    1.246   102.73
2190.77    1.239   102.28
2191.77    1.232   101.81
2192.77    1.225   101.34
2193.77    1.218   100.87
2194.77    1.211   100.39
2195.77    1.204    99.91
2196.77    1.196    99.42
2197.77    1.189    98.92
2198.77    1.181    98.42
2199.77    1.173    97.91
2200.77    1.165    97.39
2201.77    1.157    96.87
2202.77    1.149    96.33
2203.77    1.141    95.80
2204.77    1.133    95.25
2205.77    1.125    94.70
2206.77    1.117    94.13
2207.77    1.108    93.56
2208.77    1.100    92.98
2209.77    1.091    92.39
2210.77    1.083    91.80
2211.77    1.074    91.19
2212.77    1.066    90.57
2213.77    1.057    89.94
2214.77    1.048    89.31
2215.77    1.039    88.66
2216.77    1.030    88.00
2217.77    1.022    87.33
2218.77    1.013    86.64
2219.77    1.004    85.95
2220.77    0.995    85.24
2221.77    0.986    84.52
2222.77    0.977    83.79
2223.77    0.968    83.04
2224.77    0.959    82.28
2225.77    0.950    81.50
2226.77    0.941    80.71
2227.77    0.932    79.91
2228.77    0.923    79.08
2229.77    0.914    78.25
2230.77    0.905    77.39
2231.77    0.897    76.52
2232.77    0.888    75.64
2233.77    0.879    74.73
2234.77    0.871    73.81
2235.77    0.862    72.87
2236.77    0.854    71.91
2237.77    0.845    70.93
2238.77    0.837    69.93
2239.77    0.829    68.91
2240.77    0.821    67.87
2241.77    0.813    66.81
2242.77    0.805    65.73
2243.77    0.797    64.63
2244.77    0.790    63.51
2245.77    0.782    62.36
2246.77    0.775    61.20
2247.77    0.768    60.01
2248.77    0.761    58.80
2249.77    0.755    57.58
2250.77    0.748    56.32
2251.77    0.742    55.05
2252.77    0.736    53.76
2253.77    0.731    52.45
2254.77    0.725    51.11
2255.77    0.720    49.76
2256.77    0.715    48.39
2257.77    0.710    47.00
2258.77    0.706    45.59
2259.77    0.702    44.16
2260.77    0.698    42.72
2261.77    0.695    41.26
2262.77    0.692    39.79
2263.77    0.689    38.31
2264.77    0.686    36.82
2265.77    0.684    35.31
2266.77    0.682    33.80
2267.77    0.681    32.28
2268.77    0.680    30.75
2269.77    0.679    29.22
2270.77    0.679    27.69
2271.77    0.679    26.16
2272.77    0.679    24.62
2273.77    0.680    23.09
2274.77    0.681    21.56
2275.77    0.682    20.04
2276.77    0.684    18.52
2277.77    0.686    17.02
2278.77    0.688    15.52
2279.77    0.691    14.03
2280.77    0.694    12.56
2281.77    0.697    11.09
2282.77    0.701     9.65
2283.77    0.705     8.22
2284.77    0.709     6.80
2285.77    0.713     5.40
2286.77    0.718     4.02
2287.77    0.723     2.66
2288.77    0.728     1.32
2289.77    0.734   360.00
2290.77    0.740   358.70
2291.77    0.746   357.42
2292.77    0.752   356.16
2293.77    0.758   354.92
2294.77    0.765   353.70
2295.77    0.772   352.50
2296.77    0.779   351.33
2297.77    0.786   350.17
2298.77    0.793   349.04
2299.77    0.801   347.93
2300.77    0.808   346.84
2301.77    0.816   345.77






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 18:40:18



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